You could build a guidance package of solid state laser gyros, inclinometers, accelerometers and compass all feeding into a simple computer (eg Raspberry Pi) and get good enough accuracy to attack a city, obviously the further the missile had to fly the less accuracy you would get. No idea what the CEP would be after 100, 200 or a 1000 miles would be.
There was a New Zealand guy who built pulse jets who said he was going to build a unmanned "Cruise Missile" to prove it could be done. However he got into so much hot water the project went into permanent holding pattern so to speak.
https://en.wikipedia.org/wiki/Bruce_Simpson_(blogger)
There was a New Zealand guy who built pulse jets who said he was going to build a unmanned "Cruise Missile" to prove it could be done. However he got into so much hot water the project went into permanent holding pattern so to speak.
https://en.wikipedia.org/wiki/Bruce_Simpson_(blogger)