Prompt
The modern world relies on massive economies of scale to keep us alive and well fed. Ships longer than football fields, refineries as large as small cities, giant warehouses, etc. Many of these targets are shockingly vulnerable to relatively small drones costing less than $100,000 and boasting ranges up to 3000 km.
The implications for the civilized world are severe when a combination of pariah states like Russia, Iran, North Korea, Yemen, or Cuba can threaten most of the free world.
The adaptation to reduce this threat is twofold:
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Develop a new air defense paradigm that emphasizes highly mobile and inexpensive platforms.
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Harden and disperse targets so hits aren't so impactful.
Why Have One-Way Attack Drones Been So Effective?
It isn't immediately obvious that the current class of long-range one-way attack drones should be effective at all. They fly barely faster than a car drives, are extremely loud, and have relatively small payloads. Their slow speed makes them easy to shoot down, the sound and other non-stealthy features aid detection, and long range versions have ~30 kg payloads that are a fraction of standard 250-1000 kg cruise missile and bomb payloads. Some recent "jet" models travel faster or carry larger payloads but are still much slower than standard cruise missiles. The volume launched in Ukraine and Russia wasn't even that daunting compared to long planned for aircraft and cruise missile barrages until recently.
There has been an argument that the low cost (<$100,000) of these drones means they are too expensive to shoot down for modern air defenses, but this is dated. There are now a host of interception options like US APKWS rockets, attack helicopter machine guns, point defense anti-aircraft artillery, and Ukrainian interceptor drones that cost less than attacking drones. Even with these new methods interception rates are 90% at best and often significantly worse.
The difficulty lies in several features:
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Waves demand high peak interception capacity.
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Flight paths and altitudes are designed to avoid known enemy air defense assets.
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The new, inexpensive interception options are relatively short range or immobile, making it difficult to task them to every incoming drone.
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Even though these drones have long ranges, many targets are relatively short range where space and time for interception are short.
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Many targets have their own "fuel" that negates the disadvantages of small warheads. Refineries and commercial warehouse roofs can burn well beyond initial damage. Ships can lose critical machinery even if most of the ship is fine.
The reasoning behind the two defensive thrusts becomes apparent. Air defense assets need to be mobile and numerous to counter drone waves. And critical targets shouldn't suffer catastrophic losses from 30 kg warheads.
Mobile, Inexpensive Air Defense
The modern paradigm for air defense is designed to counter expensive targets like jets, cruise missiles, and ballistic missiles. First line anti-ballistic missile systems use exoatmospheric interceptors that can protect entire regions with a single site and a footprint of a few acres. Lower tier missile defense batteries have a coverage radius of hundreds of kilometers. And fighter jets have 500-1000 km combat radiuses with missiles that can fly a few hundred kilometers more. Radars on ships, shore, and specialized radar aircraft reach out hundreds of kilometers. It is an absurdly efficient paradigm - as long as the enemy targets remain expensive.
This paradigm appears frayed even without drones. Short and medium range ballistic missiles are difficult to defend and now very accurate even in the hands of middling powers.
Defense planners chose the previous strategy for a reason. Switching to cheaper assets with shorter ranges means drastically increasing the number of units and their logistics footprints. It takes 1600 units with a 10 km effective radius to get the same coverage area as one with a 400 km radius.
The replacements have to be exceptionally cheap, low footprint, and eke out every bit of performance available. One of the best options could be a Vertical Take-off and Landing (VTOL) drone gun fighter.
Making a Modern Drone Gun Fighter
In several posts I've almost included a section about a guns-only drone air superiority fighter. I cut it each time because it was too fuzzy. Then I finally read "Boyd" by Robert Coram. The discussion of his Energy-Maneuverability framework and the development of the F-16 helped firm the idea.
Boyd's vision was for the F-16 to be the ultimate dogfighter. His models pointed towards an aircraft that was very lightweight and extremely agile with less focus on top speed, payload, or sensors. The key to the aircraft's performance was keeping weight down to make turning easier, keep thrust-to-weight ratio high, range acceptable, and cost down. Adding even small amounts of weight would make the fighter more sluggish and could snowball by requiring more structure to support the extra mass, which might need more engine power, or more fuel, and on and on. The weight diet is strict; each kilogram of payload might increase total aircraft weight by several kilograms.
The Pentagon's inertia pushed fighter designs away from this ideal, and Boyd constantly fought features that would add weight and dampen performance. Some of these were a built-in pilot's ladder, radar that increased the fuselage diameter to fit, and bombs. Boyd lost some of these battles though the F-16 still ended up being an iconic aircraft and is still in production.
What if we could make an even purer version of Boyd's dream come true in drone form? Its need is even clearer today with the proliferation of cheap targets that demand cheap counters.
Requirements and Scope
The goals for such a gun fighter should be:
- Extreme agility
- High thrust-weight ratio
- Low cost
- Minimal logistics footprint
- Long endurance
- A gun, and gun only
- Vertical takeoff and landing
To excel in gun combat, the aircraft needs a gun, but it also needs extreme agility to get in position for good shots and avoid being tagged by other planes, guns, or missiles.
Large numbers can tax budgets, maintenance labor, and facilities. The capability cluster of low cost, minimal logistics footprint, and vertical takeoff and landing addresses these concerns.
Most of the US military’s investments are in missile platforms (F-22, F-35, F-15). Missile platforms and gun fighters have conflicting requirements. A pure, inexpensive gun fighter can complement the missile-focused platforms without threatening their budget.
Trade-Off Space
The requirements push strongly towards an aircraft that is as lightweight, small, and stripped down as possible.
Agility strongly favors low non-fuel mass because it is easier to get favorable lift to mass ratios.
Aircraft that can turn on a dime also have enough lift that their lift over drag ratio is good, making long endurance feasible.
Most gun fights happen at subsonic speed, and adding supersonic capability negatively impacts other goals like agility, cost, weight, and fuel efficiency. Limiting out at high subsonic is reasonable.
A speed limit does not mean the thrust-to-weight ratio can't be high. A good ratio allows quick recovery from turns in dog fights and enables vertical takeoff and landing.
A simple camera and vision stack is sufficient for sensors, similar to Tesla's self-driving hardware. It is very low cost, compact, and light.
Radar stealth is less important. Focus should be on aerodynamics and cost/ease of production.
A lightweight, high lift, subsonic aircraft is very fuel efficient. Range and endurance can be exceptional.
An inexpensive aircraft can be disposable if it breaks, cutting the entire logistical repair and maintenance tail. Fuel sipping also keeps fuel deliveries minimal. Vertical takeoff and landing eliminates the need for vulnerable and scarce airfields.
Configuration
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The Gun
The gun is the point of the aircraft and drives all other design. .50 caliber guns are mass-produced, relatively simple, and can be extremely light at ~15 kilograms stripped down.
Ammo can add more weight than the gun with a typical fighter magazine size. Each round weighs about 0.1 kilograms. 1000 rounds would add 100 kilograms. More realistic is 100-150 rounds. The drone should have very good firing accuracy, will hunt in packs, and many targets will be smaller drones or fighters rather than Russian bombers.
Multiple 5.56mm guns could also work.
Total weight is 25-30 kilograms.
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Engine Selection
The weapon payload and VTOL requirement set the conditions for which engines and propulsion architectures are acceptable. Vertical takeoff, efficient cruise, and combat speed have very different optimal configurations.
The first configuration could be purely a fan/ducted fan. These can achieve vertical takeoff very efficiently but there are tradeoffs with top speed. A hybrid electric architecture with a small battery that helps on takeoff and landing with a fuel engine to charge and run the base fan motor load would increase the top speed without sacrificing vertical takeoff and landing. The top speeds would still be in the 200-300 mph range.
That is fast enough to tackle all low-cost one way attack drones and eliminate the capability gap below conventional jet aircraft. If the drone/missile is going too fast for this aircraft and still has range and payload then it will be expensive enough that shooting it down with conventional aircraft and mid-tier missiles like AIM-9 is fine. The cost of this powertrain could also be very low; a sub $100,000 total drone cost could be possible. The cost could still be below $400,000 at the same cost per kilogram as an F-35.
A jet engine model can get to true fighter performance. Modern, affordable options like the Kratos TDI-J85 exist, though they can be fuel hogs. An adaptive engine with an electric compressor like Astro Mechanica is working on would be almost perfect for the application. Vertical takeoff, efficient cruise, and high subsonic speeds are all feasible. The fighter could handle cruise missiles and tangle with conventional fighter jets at those speeds.
Assuming a baseline of two TDI-J85s, engine mass is 26 kg. The other configurations should be under 40 kg.
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Aerodynamics
The need for a high thrust to weight ratio limits how much extra mass is available for fuel. An excellent lift over drag ratio is critical for meeting endurance requirements. At the same time, the airframe needs to be able to execute aggressive 9g+ turns. As stated before, supersonic flight is out. There are too many tradeoffs when it’s not necessary.
Good lift-to-drag ratios and turning ability are somewhat correlated. A large wing area can help agility while also providing a lot of lift. But it increases parasitic drag, especially at high speeds. Thankfully, the aircraft only needs to fly faster for short periods of time. Once on station for patrol the aircraft can fly at low speeds where drag is much lower.
The aircraft can be extremely efficient during the vast majority of its operating hours but still be able to hit its performance goals in sprints.
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Structure
Most designs immediately reach for composite bodies, but manufacturability is extremely important. Modern sheet metal designs should be able to get close to composite on mass at a fraction of the cost and lead time, with excellent scalability.
A guess is that the structure including control surfaces and fuel lines would be 50 kilograms.
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Sensors and Communications
The obvious thing to do is use automotive grade cameras and computers, similar to Tesla's self-driving software. The cameras, wire, and computer together only weigh ~5 kilograms and use a few hundred watts of power. That keeps the mass budget reasonable and minimizes the cooling load.
Another benefit is that Tesla strips out all the image filters so the neural net trains on raw photon input. The standard cameras can see near infrared if they aren't filtered. That means the cheap, basic camera and neural net can develop night vision-like capabilities. Two cameras can be used in stereo format to estimate distance. And the computer is powerful enough to manage flying the airplane and handling tactics. Training the drone autonomy stack will not be trivial, but it is likely an order of magnitude or two easier than self-driving car software.
Communications can come from the Link-16 battlefield communications protocol or more modern versions like Anduril's Lattice. A StarShield (the military version of Starlink) receiver could also be very effective.
Total mass is 6 kg.
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Fuel
Fuel can fill up the remaining mass budget. The hardware mass total is 107-120 kilograms, leaving 30-43 kilograms available for fuel.
Full power should only be necessary for a few seconds during takeoff and landing or during extreme maneuvers. Most of the time the aircraft will be operating at a few percent of power in a slow cruise (great lift over drag also means slow stall speeds!).
The TDI-J85s would only be able to loiter for a few hours because their turndown is inefficient. The fan only and adaptive engine configurations might burn as little as 1 kg/hr in the most efficient cruise, allowing for plenty of time on station.
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Maintenance and Sustainment
These drones are cheap enough to be disposable and should never be repaired. At one point in the Pacific Theater in WWII the US Navy had so many new aircraft coming in that it would push aircraft that needed even minor repairs off the side of the deck into the ocean. That is the only reasonable way to handle drones like this, especially when there might be 1000 of these for every F-16 or F-35.
Fueling and reloading ammo should be the only ground operation. Even better that the fuel usage per aircraft is tiny and that 0.50 caliber rounds are easy to handle.
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Training
It makes sense at first to teleoperate/fly the drones to help train and inform the automation software development. That path puts the pilot peak in the thousands instead of tens or hundreds of thousands that might be necessary for global deployment. Competent pilots become a limiting factor quickly when the drones are easy to produce and maintain.
Manufacturing
Aircraft programs can be horrifically expensive. Not only is designing the aircraft complicated, but tooling and factory costs can be as much as half of the development cost.
The simplicity, small size, and lack of a human pilot reduce design costs by reducing the work content. There aren't as many systems to design and the design doesn't have to be perfect upfront because no humans will fly and the unit cost is very low.
Making the body and other parts out of laser-cut sheet metal can slash tooling costs. Laser cutting and laser welding are technologies that have undergone rapid improvement. 3D printed tooling is under development, too. A design utilizing these technologies could allow rapid and inexpensive production.
The marginal cost of these drones could easily be less than $100,000 for the fan version and a few hundred thousand for the adaptive engine.
Altering the Design
The combination of the simplistic design and new manufacturing technology changes how aircraft can evolve, too.
Sheet metal drone bodies without hard tooling can change easily.
Drone fighters will use end-to-end trained neural nets on cheap, automotive-grade hardware that eliminates most low-level code.
LLMs hooked to design software can also shorten the conceptual and detailed design phases.
The traditional aircraft with small modifications over time is the incorrect way to do things. If it becomes important to have a model that is stealthier, has a different gun, carries APKWS rockets, or whatever, it makes sense to redesign and optimize the aircraft around these changes rather than being stuck within the existing framework. We can see this in the current Ukraine war where there are dozens of drone models at any time that are constantly evolving and optimized for different missions.
Tactics
The aircraft would receive data and general orders from other platforms given its limited vision. That could be from networks of smaller scout drones, traditional radars, orders from human operators/supervisors, or any other sources. A wider sensor net serves as another weight saving measure.
The small footprint means the aircraft can base near the operating area.
Hundreds or thousands might patrol at one time around coastlines, borders, or naval formations to maintain a wall of coverage against drones and cruise missiles.
Eventually they might act as skirmishers for larger, traditional fighters by engaging enemy squadrons during missile fights to constrain their movement and increase kill percentage. If I was an F-35 pilot I think I'd rather have hundreds of subsonic gun fighters with me than 2 subsonic CCA missile carrier drones.
Ballistic Missile Defense
Ballistic missiles present many problems, but many of the answers are already known and long-range versions cost orders of magnitude more than long-range drones.
The first is a constant pressure to reduce the cost of interceptors to be comparable to the missiles. Upgraded endoatmospheric interceptors like a PAC-3 supplement exoatmospheric interceptors such as SM-3 and THAAD that are 4x more expensive. New versions are under development that will enable another step change down in costs. At the limit simple defensive batteries can be at the attacking missiles’ aim point and intercept in the last few thousand meters where the "head on" profile is a much easier shot.
Long-loiter time attack drones like the Reaper have also performed well hunting launchers in Iran. But they are too expensive and short in number relative to losses. The Ukraine conflict has shown a smaller, simpler version of these could cost 100x less even if it is several times more expensive than Ukrainian variants. General Atomics certainly won't build it, but there are companies in the US that can.
Hardening Targets
Some ballistic missiles and drones are still going to get through. Likely targets need some resilience. The key theme is don't allow easy wins for attackers.
Ships
Even though it’s hard for low-payload aerial drones to sink large commercial ships, it is fairly easy to achieve "mission kills." The engine room and bridge are vulnerable before even considering knock on effects like insurance costs.
Ships traveling dangerous routes need designs where these critical nodes have some protection. In my post on naval shipbuilding I discussed some relatively cheap options for armor that could also be easy to repair.
Additionally, when ships are exposed to air power they often get smaller so each loss is less impactful. These smaller, specialized ships can make runs through danger areas like the Strait of Hormuz and link up with typical commercial vessels to transfer their cargo or go to a nearby port to unload.
Drones have very long ranges and can mount surprise attacks on shipping almost anywhere globally, but sustained attacks will likely be shorter range if shipping is protected by distributed, mobile air defense.
Buildings/Factories
Most warehouses and factories are too big to be significantly impacted by a small drone attack unless they have features like flammable roof materials that allow one drone to burn down a million square foot building. Roof fire ratings are important!
Refineries and Fuel
Refineries are the most difficult target to harden. They require relatively higher investment in air defense, along with spare equipment and reserve repair crews to quickly return plants to production.
The most vulnerable and difficult to repair portions involve turning heavier compounds into gasoline and diesel, so electrifying ground transportation is a strong substitute. It already takes monthly or greater strike frequency to damage Russian refinery output and that might decrease to weekly for teapot refineries that don't need to increase gasoline and diesel cuts from the raw crude.
Military Bases
Two strategies work for military force concentrations. The first is to cover vulnerable soldiers and equipment with concrete or rock (via digging). The second is to spread assets so thin they aren't feasible to target. Digging tends to be the most practical for near front lines where small drones are thick or for the most expensive systems, like bomber aircraft. Dispersing works for almost everything else. Disperse and dig!
US Power Projection
Despite the massive military budget, the US military is optimized for a relatively narrow mission set. It assumes that two armies are facing off. Scenarios where the enemy is hiding, underground, or just doesn't care are harder to deal with. Before recently the US could mostly ignore forces in these postures if it wanted. Any truly threatening opposition would fall within the optimized mission set.
The break point is that precision munitions have become orders of magnitude cheaper and more available over the last decade or two. Cheap drones and ballistic missiles taking pot shots at economically and militarily important targets make lesser powers harder to ignore.
That change collides directly with the US's strength of deploying ultra-powerful formations concentrated in a small number of bases that don't impose too heavily on host nations. These concentrations become a liability when precision is cheap.
A secondary concern is that the US has relied on an offensive focus since the 1940s. The relevance for an offensive focus has frayed when the US populace has a very low appetite for war, most countries in the world are aligned with the US-led bloc, almost all the outliers have nuclear weapons, and the said outliers can easily implement their own version of "disperse and dig" that blunts offensive power.
The US defense strategy needs to adapt. I will have a lot more to say in future posts and a talk I will give on the likely evolution of drone form factors at the 2026 Progress Conference (we are still in the 1st inning).
In brief, the US also needs low end air and sea power to complement its powerful offensive weapons. These platforms with long loiter times can counter cheap precision and efficiently prosecute dispersed targets. Loitering attack drones can wait for missile launchers and other high value targets to emerge out of hiding. Long-legged gun fighter drones and patrol boats can counter drones and small ocean surface combatants.
Equally key is that these low-intensity weapons can have small and distributed footprints that are easier to harden and more difficult to target. Large bases anywhere close to hostile actors are now obsolete in their current form.
There is an obvious deployment strategy in a world where US allies are richer, have more state capacity, have more desire for independence than ever, and the weapons paradigm is moving away from bespoke systems to those that are easy to operate and deploy. The US can help design and build weapons for allies in dangerous regions to operate with minimal training/advising footprints. Even if the US operates the systems, the forward deployed component can be tiny with a minimal logistics tail.
Flooding these zones with long loitering and low footprint weapons can diminish some of cheap precision's asymmetric advantage. Things won't be pleasant for everyone. The Gulf States come to mind. Opposition countries will work on the next iteration of capabilities and change will be constant for the next few decades, similar to the early 20th century.
The US should perform well in the new era because the constraints for further proliferation (and defense) are in intelligence, systems integration, and control of Low Earth Orbit, not manufacturing or assembly. A few dozen semi-trucks can carry one month’s worth of Russian and Ukrainian FPV drone production (a million units, a few hundred tons). Organizing that much mass isn't difficult for the US economy, if properly motivated. And it doesn't matter if US defense products are 30% more expensive than in Asia. What is really hard is putting useful intelligence into something that weighs 1 kg or 100 kg and can still fly at a reasonable range and price point. Remotely piloting every drone with humans is a massive bottleneck currently. Terminal Autonomy's Hornet fixed wing drone is an early example of how the US can stay on the frontier.
The American umbrella is dead, long live the American umbrella!
Defending Against Massed Drone Attacks
2026 September 15 Twitter Substack See all postsA new air defense strategy is needed to counter long range attack drones.
Prompt
The modern world relies on massive economies of scale to keep us alive and well fed. Ships longer than football fields, refineries as large as small cities, giant warehouses, etc. Many of these targets are shockingly vulnerable to relatively small drones costing less than $100,000 and boasting ranges up to 3000 km.
The implications for the civilized world are severe when a combination of pariah states like Russia, Iran, North Korea, Yemen, or Cuba can threaten most of the free world.
The adaptation to reduce this threat is twofold:
Develop a new air defense paradigm that emphasizes highly mobile and inexpensive platforms.
Harden and disperse targets so hits aren't so impactful.
Why Have One-Way Attack Drones Been So Effective?
It isn't immediately obvious that the current class of long-range one-way attack drones should be effective at all. They fly barely faster than a car drives, are extremely loud, and have relatively small payloads. Their slow speed makes them easy to shoot down, the sound and other non-stealthy features aid detection, and long range versions have ~30 kg payloads that are a fraction of standard 250-1000 kg cruise missile and bomb payloads. Some recent "jet" models travel faster or carry larger payloads but are still much slower than standard cruise missiles. The volume launched in Ukraine and Russia wasn't even that daunting compared to long planned for aircraft and cruise missile barrages until recently.
There has been an argument that the low cost (<$100,000) of these drones means they are too expensive to shoot down for modern air defenses, but this is dated. There are now a host of interception options like US APKWS rockets, attack helicopter machine guns, point defense anti-aircraft artillery, and Ukrainian interceptor drones that cost less than attacking drones. Even with these new methods interception rates are 90% at best and often significantly worse.
The difficulty lies in several features:
Waves demand high peak interception capacity.
Flight paths and altitudes are designed to avoid known enemy air defense assets.
The new, inexpensive interception options are relatively short range or immobile, making it difficult to task them to every incoming drone.
Even though these drones have long ranges, many targets are relatively short range where space and time for interception are short.
Many targets have their own "fuel" that negates the disadvantages of small warheads. Refineries and commercial warehouse roofs can burn well beyond initial damage. Ships can lose critical machinery even if most of the ship is fine.
The reasoning behind the two defensive thrusts becomes apparent. Air defense assets need to be mobile and numerous to counter drone waves. And critical targets shouldn't suffer catastrophic losses from 30 kg warheads.
Mobile, Inexpensive Air Defense
The modern paradigm for air defense is designed to counter expensive targets like jets, cruise missiles, and ballistic missiles. First line anti-ballistic missile systems use exoatmospheric interceptors that can protect entire regions with a single site and a footprint of a few acres. Lower tier missile defense batteries have a coverage radius of hundreds of kilometers. And fighter jets have 500-1000 km combat radiuses with missiles that can fly a few hundred kilometers more. Radars on ships, shore, and specialized radar aircraft reach out hundreds of kilometers. It is an absurdly efficient paradigm - as long as the enemy targets remain expensive.
This paradigm appears frayed even without drones. Short and medium range ballistic missiles are difficult to defend and now very accurate even in the hands of middling powers.
Defense planners chose the previous strategy for a reason. Switching to cheaper assets with shorter ranges means drastically increasing the number of units and their logistics footprints. It takes 1600 units with a 10 km effective radius to get the same coverage area as one with a 400 km radius.
The replacements have to be exceptionally cheap, low footprint, and eke out every bit of performance available. One of the best options could be a Vertical Take-off and Landing (VTOL) drone gun fighter.
Making a Modern Drone Gun Fighter
In several posts I've almost included a section about a guns-only drone air superiority fighter. I cut it each time because it was too fuzzy. Then I finally read "Boyd" by Robert Coram. The discussion of his Energy-Maneuverability framework and the development of the F-16 helped firm the idea.
Boyd's vision was for the F-16 to be the ultimate dogfighter. His models pointed towards an aircraft that was very lightweight and extremely agile with less focus on top speed, payload, or sensors. The key to the aircraft's performance was keeping weight down to make turning easier, keep thrust-to-weight ratio high, range acceptable, and cost down. Adding even small amounts of weight would make the fighter more sluggish and could snowball by requiring more structure to support the extra mass, which might need more engine power, or more fuel, and on and on. The weight diet is strict; each kilogram of payload might increase total aircraft weight by several kilograms.
The Pentagon's inertia pushed fighter designs away from this ideal, and Boyd constantly fought features that would add weight and dampen performance. Some of these were a built-in pilot's ladder, radar that increased the fuselage diameter to fit, and bombs. Boyd lost some of these battles though the F-16 still ended up being an iconic aircraft and is still in production.
What if we could make an even purer version of Boyd's dream come true in drone form? Its need is even clearer today with the proliferation of cheap targets that demand cheap counters.
Requirements and Scope
The goals for such a gun fighter should be:
To excel in gun combat, the aircraft needs a gun, but it also needs extreme agility to get in position for good shots and avoid being tagged by other planes, guns, or missiles.
Large numbers can tax budgets, maintenance labor, and facilities. The capability cluster of low cost, minimal logistics footprint, and vertical takeoff and landing addresses these concerns.
Most of the US military’s investments are in missile platforms (F-22, F-35, F-15). Missile platforms and gun fighters have conflicting requirements. A pure, inexpensive gun fighter can complement the missile-focused platforms without threatening their budget.
Trade-Off Space
The requirements push strongly towards an aircraft that is as lightweight, small, and stripped down as possible.
Agility strongly favors low non-fuel mass because it is easier to get favorable lift to mass ratios.
Aircraft that can turn on a dime also have enough lift that their lift over drag ratio is good, making long endurance feasible.
Most gun fights happen at subsonic speed, and adding supersonic capability negatively impacts other goals like agility, cost, weight, and fuel efficiency. Limiting out at high subsonic is reasonable.
A speed limit does not mean the thrust-to-weight ratio can't be high. A good ratio allows quick recovery from turns in dog fights and enables vertical takeoff and landing.
A simple camera and vision stack is sufficient for sensors, similar to Tesla's self-driving hardware. It is very low cost, compact, and light.
Radar stealth is less important. Focus should be on aerodynamics and cost/ease of production.
A lightweight, high lift, subsonic aircraft is very fuel efficient. Range and endurance can be exceptional.
An inexpensive aircraft can be disposable if it breaks, cutting the entire logistical repair and maintenance tail. Fuel sipping also keeps fuel deliveries minimal. Vertical takeoff and landing eliminates the need for vulnerable and scarce airfields.
Configuration
The Gun
The gun is the point of the aircraft and drives all other design. .50 caliber guns are mass-produced, relatively simple, and can be extremely light at ~15 kilograms stripped down.
Ammo can add more weight than the gun with a typical fighter magazine size. Each round weighs about 0.1 kilograms. 1000 rounds would add 100 kilograms. More realistic is 100-150 rounds. The drone should have very good firing accuracy, will hunt in packs, and many targets will be smaller drones or fighters rather than Russian bombers.
Multiple 5.56mm guns could also work.
Total weight is 25-30 kilograms.
Engine Selection
The weapon payload and VTOL requirement set the conditions for which engines and propulsion architectures are acceptable. Vertical takeoff, efficient cruise, and combat speed have very different optimal configurations.
The first configuration could be purely a fan/ducted fan. These can achieve vertical takeoff very efficiently but there are tradeoffs with top speed. A hybrid electric architecture with a small battery that helps on takeoff and landing with a fuel engine to charge and run the base fan motor load would increase the top speed without sacrificing vertical takeoff and landing. The top speeds would still be in the 200-300 mph range.
That is fast enough to tackle all low-cost one way attack drones and eliminate the capability gap below conventional jet aircraft. If the drone/missile is going too fast for this aircraft and still has range and payload then it will be expensive enough that shooting it down with conventional aircraft and mid-tier missiles like AIM-9 is fine. The cost of this powertrain could also be very low; a sub $100,000 total drone cost could be possible. The cost could still be below $400,000 at the same cost per kilogram as an F-35.
A jet engine model can get to true fighter performance. Modern, affordable options like the Kratos TDI-J85 exist, though they can be fuel hogs. An adaptive engine with an electric compressor like Astro Mechanica is working on would be almost perfect for the application. Vertical takeoff, efficient cruise, and high subsonic speeds are all feasible. The fighter could handle cruise missiles and tangle with conventional fighter jets at those speeds.
Assuming a baseline of two TDI-J85s, engine mass is 26 kg. The other configurations should be under 40 kg.
Aerodynamics
The need for a high thrust to weight ratio limits how much extra mass is available for fuel. An excellent lift over drag ratio is critical for meeting endurance requirements. At the same time, the airframe needs to be able to execute aggressive 9g+ turns. As stated before, supersonic flight is out. There are too many tradeoffs when it’s not necessary.
Good lift-to-drag ratios and turning ability are somewhat correlated. A large wing area can help agility while also providing a lot of lift. But it increases parasitic drag, especially at high speeds. Thankfully, the aircraft only needs to fly faster for short periods of time. Once on station for patrol the aircraft can fly at low speeds where drag is much lower.
The aircraft can be extremely efficient during the vast majority of its operating hours but still be able to hit its performance goals in sprints.
Structure
Most designs immediately reach for composite bodies, but manufacturability is extremely important. Modern sheet metal designs should be able to get close to composite on mass at a fraction of the cost and lead time, with excellent scalability.
A guess is that the structure including control surfaces and fuel lines would be 50 kilograms.
Sensors and Communications
The obvious thing to do is use automotive grade cameras and computers, similar to Tesla's self-driving software. The cameras, wire, and computer together only weigh ~5 kilograms and use a few hundred watts of power. That keeps the mass budget reasonable and minimizes the cooling load.
Another benefit is that Tesla strips out all the image filters so the neural net trains on raw photon input. The standard cameras can see near infrared if they aren't filtered. That means the cheap, basic camera and neural net can develop night vision-like capabilities. Two cameras can be used in stereo format to estimate distance. And the computer is powerful enough to manage flying the airplane and handling tactics. Training the drone autonomy stack will not be trivial, but it is likely an order of magnitude or two easier than self-driving car software.
Communications can come from the Link-16 battlefield communications protocol or more modern versions like Anduril's Lattice. A StarShield (the military version of Starlink) receiver could also be very effective.
Total mass is 6 kg.
Fuel
Fuel can fill up the remaining mass budget. The hardware mass total is 107-120 kilograms, leaving 30-43 kilograms available for fuel.
Full power should only be necessary for a few seconds during takeoff and landing or during extreme maneuvers. Most of the time the aircraft will be operating at a few percent of power in a slow cruise (great lift over drag also means slow stall speeds!).
The TDI-J85s would only be able to loiter for a few hours because their turndown is inefficient. The fan only and adaptive engine configurations might burn as little as 1 kg/hr in the most efficient cruise, allowing for plenty of time on station.
Maintenance and Sustainment
These drones are cheap enough to be disposable and should never be repaired. At one point in the Pacific Theater in WWII the US Navy had so many new aircraft coming in that it would push aircraft that needed even minor repairs off the side of the deck into the ocean. That is the only reasonable way to handle drones like this, especially when there might be 1000 of these for every F-16 or F-35.
Fueling and reloading ammo should be the only ground operation. Even better that the fuel usage per aircraft is tiny and that 0.50 caliber rounds are easy to handle.
Training
It makes sense at first to teleoperate/fly the drones to help train and inform the automation software development. That path puts the pilot peak in the thousands instead of tens or hundreds of thousands that might be necessary for global deployment. Competent pilots become a limiting factor quickly when the drones are easy to produce and maintain.
Manufacturing
Aircraft programs can be horrifically expensive. Not only is designing the aircraft complicated, but tooling and factory costs can be as much as half of the development cost.
The simplicity, small size, and lack of a human pilot reduce design costs by reducing the work content. There aren't as many systems to design and the design doesn't have to be perfect upfront because no humans will fly and the unit cost is very low.
Making the body and other parts out of laser-cut sheet metal can slash tooling costs. Laser cutting and laser welding are technologies that have undergone rapid improvement. 3D printed tooling is under development, too. A design utilizing these technologies could allow rapid and inexpensive production.
The marginal cost of these drones could easily be less than $100,000 for the fan version and a few hundred thousand for the adaptive engine.
Altering the Design
The combination of the simplistic design and new manufacturing technology changes how aircraft can evolve, too.
Sheet metal drone bodies without hard tooling can change easily.
Drone fighters will use end-to-end trained neural nets on cheap, automotive-grade hardware that eliminates most low-level code.
LLMs hooked to design software can also shorten the conceptual and detailed design phases.
The traditional aircraft with small modifications over time is the incorrect way to do things. If it becomes important to have a model that is stealthier, has a different gun, carries APKWS rockets, or whatever, it makes sense to redesign and optimize the aircraft around these changes rather than being stuck within the existing framework. We can see this in the current Ukraine war where there are dozens of drone models at any time that are constantly evolving and optimized for different missions.
Tactics
The aircraft would receive data and general orders from other platforms given its limited vision. That could be from networks of smaller scout drones, traditional radars, orders from human operators/supervisors, or any other sources. A wider sensor net serves as another weight saving measure.
The small footprint means the aircraft can base near the operating area.
Hundreds or thousands might patrol at one time around coastlines, borders, or naval formations to maintain a wall of coverage against drones and cruise missiles.
Eventually they might act as skirmishers for larger, traditional fighters by engaging enemy squadrons during missile fights to constrain their movement and increase kill percentage. If I was an F-35 pilot I think I'd rather have hundreds of subsonic gun fighters with me than 2 subsonic CCA missile carrier drones.
Ballistic Missile Defense
Ballistic missiles present many problems, but many of the answers are already known and long-range versions cost orders of magnitude more than long-range drones.
The first is a constant pressure to reduce the cost of interceptors to be comparable to the missiles. Upgraded endoatmospheric interceptors like a PAC-3 supplement exoatmospheric interceptors such as SM-3 and THAAD that are 4x more expensive. New versions are under development that will enable another step change down in costs. At the limit simple defensive batteries can be at the attacking missiles’ aim point and intercept in the last few thousand meters where the "head on" profile is a much easier shot.
Long-loiter time attack drones like the Reaper have also performed well hunting launchers in Iran. But they are too expensive and short in number relative to losses. The Ukraine conflict has shown a smaller, simpler version of these could cost 100x less even if it is several times more expensive than Ukrainian variants. General Atomics certainly won't build it, but there are companies in the US that can.
Hardening Targets
Some ballistic missiles and drones are still going to get through. Likely targets need some resilience. The key theme is don't allow easy wins for attackers.
Ships
Even though it’s hard for low-payload aerial drones to sink large commercial ships, it is fairly easy to achieve "mission kills." The engine room and bridge are vulnerable before even considering knock on effects like insurance costs.
Ships traveling dangerous routes need designs where these critical nodes have some protection. In my post on naval shipbuilding I discussed some relatively cheap options for armor that could also be easy to repair.
Additionally, when ships are exposed to air power they often get smaller so each loss is less impactful. These smaller, specialized ships can make runs through danger areas like the Strait of Hormuz and link up with typical commercial vessels to transfer their cargo or go to a nearby port to unload.
Drones have very long ranges and can mount surprise attacks on shipping almost anywhere globally, but sustained attacks will likely be shorter range if shipping is protected by distributed, mobile air defense.
Buildings/Factories
Most warehouses and factories are too big to be significantly impacted by a small drone attack unless they have features like flammable roof materials that allow one drone to burn down a million square foot building. Roof fire ratings are important!
Refineries and Fuel
Refineries are the most difficult target to harden. They require relatively higher investment in air defense, along with spare equipment and reserve repair crews to quickly return plants to production.
The most vulnerable and difficult to repair portions involve turning heavier compounds into gasoline and diesel, so electrifying ground transportation is a strong substitute. It already takes monthly or greater strike frequency to damage Russian refinery output and that might decrease to weekly for teapot refineries that don't need to increase gasoline and diesel cuts from the raw crude.
Military Bases
Two strategies work for military force concentrations. The first is to cover vulnerable soldiers and equipment with concrete or rock (via digging). The second is to spread assets so thin they aren't feasible to target. Digging tends to be the most practical for near front lines where small drones are thick or for the most expensive systems, like bomber aircraft. Dispersing works for almost everything else. Disperse and dig!
US Power Projection
Despite the massive military budget, the US military is optimized for a relatively narrow mission set. It assumes that two armies are facing off. Scenarios where the enemy is hiding, underground, or just doesn't care are harder to deal with. Before recently the US could mostly ignore forces in these postures if it wanted. Any truly threatening opposition would fall within the optimized mission set.
The break point is that precision munitions have become orders of magnitude cheaper and more available over the last decade or two. Cheap drones and ballistic missiles taking pot shots at economically and militarily important targets make lesser powers harder to ignore.
That change collides directly with the US's strength of deploying ultra-powerful formations concentrated in a small number of bases that don't impose too heavily on host nations. These concentrations become a liability when precision is cheap.
A secondary concern is that the US has relied on an offensive focus since the 1940s. The relevance for an offensive focus has frayed when the US populace has a very low appetite for war, most countries in the world are aligned with the US-led bloc, almost all the outliers have nuclear weapons, and the said outliers can easily implement their own version of "disperse and dig" that blunts offensive power.
The US defense strategy needs to adapt. I will have a lot more to say in future posts and a talk I will give on the likely evolution of drone form factors at the 2026 Progress Conference (we are still in the 1st inning).
In brief, the US also needs low end air and sea power to complement its powerful offensive weapons. These platforms with long loiter times can counter cheap precision and efficiently prosecute dispersed targets. Loitering attack drones can wait for missile launchers and other high value targets to emerge out of hiding. Long-legged gun fighter drones and patrol boats can counter drones and small ocean surface combatants.
Equally key is that these low-intensity weapons can have small and distributed footprints that are easier to harden and more difficult to target. Large bases anywhere close to hostile actors are now obsolete in their current form.
There is an obvious deployment strategy in a world where US allies are richer, have more state capacity, have more desire for independence than ever, and the weapons paradigm is moving away from bespoke systems to those that are easy to operate and deploy. The US can help design and build weapons for allies in dangerous regions to operate with minimal training/advising footprints. Even if the US operates the systems, the forward deployed component can be tiny with a minimal logistics tail.
Flooding these zones with long loitering and low footprint weapons can diminish some of cheap precision's asymmetric advantage. Things won't be pleasant for everyone. The Gulf States come to mind. Opposition countries will work on the next iteration of capabilities and change will be constant for the next few decades, similar to the early 20th century.
The US should perform well in the new era because the constraints for further proliferation (and defense) are in intelligence, systems integration, and control of Low Earth Orbit, not manufacturing or assembly. A few dozen semi-trucks can carry one month’s worth of Russian and Ukrainian FPV drone production (a million units, a few hundred tons). Organizing that much mass isn't difficult for the US economy, if properly motivated. And it doesn't matter if US defense products are 30% more expensive than in Asia. What is really hard is putting useful intelligence into something that weighs 1 kg or 100 kg and can still fly at a reasonable range and price point. Remotely piloting every drone with humans is a massive bottleneck currently. Terminal Autonomy's Hornet fixed wing drone is an early example of how the US can stay on the frontier.
The American umbrella is dead, long live the American umbrella!