The Fieseler Fi 103/FZG-76 was known as the flying bomb, the Buzz bomb or the “Doodlebug” by the British public. some 10,000 of these pulse jet-powered weapons were launched, but only 2,419 are known to have reached the London area. 4,261 were downed by fighters, anti-aircraft guns, and barrage balloons. Fast fighters like the Gloster Meteor and Hawker Tempest would attempt to flip over the V1 if they couldn't shoot it down. Antwerp, Belgium was also hit by these bombs. 30,000 were manufactured in slave labor camps. 5,500 people were killed during the raids between June 1944 and March 1945.
The V1 engine could be heard for 10 miles (16 kilometers) and stopped when the device dropped its nose to the ground. Also, British double agents gave false reports indicating the V1s were overshooting their targets, and the Germans compensated by shortening their range, which led thousands to fall short of their target.
IWM Duxford has several preserved V1s, including an entire launch ramp.