Vacuum Tube Era
1935 - Watson Watt invented radar
1942 - Radar was miniaturized and shock proofed so that it could be mounted on a 40mm HE-T shell and fired at aircraft
1945 - Millions of those radar fused shells had been produced at a then year price
The 1942 radar/proximity/variable-time/self-destruct fuse cost US$732 in 1942 dollars or something like US$25,000 today.
The 2026 BAE Bofors 3P fuze which includes the radar proximity switch complete with the 40 x 365 mm PFHE round is estimated to cost in the range of US$1000-2500 each
In 80 years the technology has reduced in relative cost by an order of magnitude.
The technology is now found in factories, homes and cars for hundreds, sometimes tens, of 2026 dollars.
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Transistor Era
In 1970 the US produced an artillery shell capable of autonomous flight, the Copperhead.
Autonomous in this instance I am defining as the ability to adjust its flight path independently in flight to engage a specified target.
That laser guded, cannon launched UAV is still in service and apparently cost about US$75,000.
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Commodore 64 Era
In 1979 the British married up an improved proximity fuse, an MMW radar system with both receiver and transmitter onboard an 81 mm mortar round, with an autonomous flight control system and created the Merlin which could search a 300 x 300 m area on its own, detect targets and discriminate among them and choose independently which targets to attack. The 1979 price was estimated at US$18,000 or about US$30,000 in 2026 dollars.
In 1987 the Merlin seeker was patched onto the American Hellfire missile and brought into service as Brimstone missile that could be launched from fast movers in salvos that would find their own targets without the fast mover entering the target area. That missile is currently in service in Ukraine at a reputed unit cost of $100,000
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Intel Pentium and Windows 95 Era
In 1994 the US added a flight control sytem to an MRLS rocket creating the GMRLS (Guided MRLS) which, like the Copperhead, Merlin and Brimstone before it, would fly itself to a designated target. Autonomous flight by my definition. The complete GMRLS sells for about US$100,000 today.
In 1995 the US developed the JDAM (Joint Direct Attack Munition) kit which would allow any bomb in the US inventory to fly itself to a target, just like the GMRLS, at a cost of about US$18,000 a kit or about US$38,000 in today's money.
In 1998 the US developed the DAMASK seeker Direct Attack Munition Affordable Seeker as a JDAM derivative. For an additional US$12,700 (US$25,000 today), the bomb would fly itself to the target area, observe the target area, orient what it saw to the information available to it in its memory, decide on what, where and how to attack and then act by flyimg itself to the target and detonating.
JDAM plus DAMASK would have cost about US$30,000 then or US$60,000 plus the bomb with an Imaging Infrared sensor.
An SDB, derived from these technologies costs approximately US$40,000 to US$60,000 today.
The SDB II, with an MMW seeker like Merlin and Brimstone costs US$200,000 to US$250,000
The Quicksink kit, a more recent derivative costs about the same price.
By the early 2000s the US was strapping JDAM type flight control systems on everything from 70mm rockets, through 120mm mortar rounds and 155mm artillery rounds to MRLS rockets.
2004 PGM-M -120mm Mortar bombs - US$34,000
2005 APKWS II - 70mm Hydra rockets - US$15-20,000
2007 PGM-K - 155 mm Artillery shells - US$10,000
All unit costs, all 2026 dollars.
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Smartphone Era
in 2010 Israel introduced a PGM kit, the EPIK, that could be attached to any rocket, including the ubiquitous Soviet 122 mm, and have it fly itself to any target area, pick out its target and decide where and how to strike it and destroy it. And the 2010 price for the kit, the marginal cost on top of the cost of the rocket, was US$2000. US$2500 in today's money.
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The Era of the Cloud - the current era.
What is the minimum cost required to put a vehicle in flight, fly itself to a target, and then act according to instructions, with added bonus of being able to pause in flight, divert to another target or return to base to be reused?
US$200 - DJI Neo UAV
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1945 - US$25,000 to address a target with a Proximity Fused round that now only costs US$2500
1980 - US$30,000 to address a target with discriminating MMW radar round that picked out the tanks from the back ground
1995 - US$25.000 to send any projectile to address a target and have it fly itself to that target area, for $60,000 it would find a particular target
2010 - US$2,500 to send any projectile to any target area, have it fly itself to the area, decide on the target and the attack profile and prosecute
2025 - US$200 to send an aerial vehicle anywhere, have it fly itself to the area, decide on the target, how to attack and if to attack or if to divert to an alternate target, or return to base, or an alternate or request new orders.
And the intelligence issuing the new orders may not be human.
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If not today, then tomorrow.
And the prox fused rounds are now compatible with rounds in the 25-30 mm range and cost in the low hundreds of dollars a piece.
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And finally,
The Gepard 35mm typically fires 6x 35 mm AHEAD style rounds to neutralize a Shahed-style drone that is in range. Estimated cost per round is US$1000 or US$6000 per kill.
The Gepard or Boxer-SkyRanger 35 costs about US$35,000,000 and requires a crew of 3 on shift (15 to maintain 24/7 coverage)
...
The Ukrainians are reporting two Sting FPV interceptors per Shahed kill and 5 interceptors per all Russian losses.
At US$1000 per interceptor.
Or US$2,000 per Shahed kill
1500 kills in a month in 2026. Up to 70% of kills in some areas.
As to the image of buddy in a virtual mask flying his FPV into the target..
"Are Ukrainians using ai autonomously to detect incoming drones, target them, launch interceptors, fly them to the targets and hit them?"
"Yes, Ukrainian forces are actively deploying AI-powered autonomous systems to detect, track, and intercept Russian drones, a development that is transforming aerial warfare, particularly against Shahed-type loitering munitions. As of April 2026, these technologies are moving from experimental testing to operational use, allowing for the interception of targets with minimal or no human intervention in the final engagement phase."
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Even allowing for bumf, propaganda, misinformation, disinformation, maskirovka and just plain error, to my mind there seems to be a clear direction of travel:
cheaper,
smarter,
more widely distributed
more generally accessible.