Rockets

[Paciat]

V1s were "flying bombs" not missiles.

That's what they were named back then. Their type though, is a (guided) missile. It is rather a must for a bomb to not have it's own propulsion, hence, the V1 can't be a bomb in the technical sense of the word.

No, missels have rocket engines, V1 had a jet engine.
A bomb is an explosive weapon detonated by impact, proximity to an object, a timing mechanism, or other means.
Checked in the dictionary.

[Tico_1990]

http://en.wikipedia.org/wiki/V1_flying_bomb

type: guided missile.

Also in military terms, a bomb is not powered, aka, does not have any type of engine. Given the engine on the V1, it can't be a bomb in the technical sense of the word

[Otto Halfhand]

The Buzz bomb was propelled by an engine that worked on the principle of a jet engine. The original "jet engine" was developed by a Greek chap who lived in Syracuse during the fourth or fifth century BC. It was powered by steam. The V1 was powered by a spark plug that fired by compressiion. I'm not sure whether that makes it a diesel or an Otto  engine. When the spark plug ignited the vapor propellant the rapid acelleration of the fuel caused it to scream through baffles. Hence the intermitant Buzz Saw like sound that characterized the weapon. The V1 was originally dropped or launched from bombers which may explain the "bomb" terminology. THe RAF was good at shooting down German bombers so the Luftwaffe switched to a ground launch system.
A mortar shell is technically a bomb. It is launched by a solid fuel propulsion system.

IIRC the wings of the V1 were constructed of plywood!