What is V-1 flying bomb?
{{Infobox weapon |name = V-1 flying bomb <br> Fieseler Fi 103 <br>''Flakzielgerät 76 (FZG-76)'' |image = Bundesarchiv Bild 146-1975-117-26, Marschflugkörper V1 vor Start.jpg |caption = |origin = [[Nazi Germany]] |type = Guided missile <!-- Type selection --> |is_explosive = yes |is_missile = yes <!-- Service history --> |service = 1944–1945 |used_by = ''[[Luftwaffe]]'' |wars = [[World War II]] <!-- Production history --> |designer = Robert Lusser |design_date = |manufacturer = [[Fieseler]] |unit_cost = 5,090 [[German Reichsmark|RM]]<ref>Zaloga, Steven 2005, p11. ''V-1 Flying Bomb 1942–52''. Oxford, UK: Osprey Publishing. ISBN 978-1-84176-791-8</ref> |production_date = |number = |variants = <!-- General specifications --> |spec_label = |weight = {{convert|2150|kg|lb|abbr=on}} |length = {{convert|8.32|m|abbr=on}} |part_length = |width = {{convert|5.37|m|abbr=on}} |height = {{convert|1.42|m|abbr=on}} |diameter = <!-- Explosive specifications --> |filling = [[Amatol|Amatol-39]] |filling_weight = {{convert|850|kg|lb|abbr=on}} |detonation = |yield = <!-- Vehicle/missile specifications --> |engine = [[Argus As 014|Argus As 109-014]] [[Pulse jet engine]] |engine_power = |payload_capacity = |fuel_capacity = |pw_ratio = |vehicle_range = {{convert|250|km|mi|abbr=on}} <ref>Werrell, Kenneth P. 1985, p53. ''The Evolution of the Cruise Missile''. Maxwell Air Force Base, Alabama: Air University Press</ref> |speed = {{convert|640|km/h|mph|abbr=on}} flying between {{convert|600|to|900|m|ft|abbr=on}} |guidance = [[Gyrocompass]] based [[autopilot]]}} The '''V-1 flying bomb''' (also called the '''Buzz Bomb''' or '''Doodlebug''') was a [[World War II]] [[weapon]].<ref>Cooksley, Peter 1979. ''Flying Bomb, the story of Hitler's V-Weapons in World War II''. New York: Charles Scribner's Sons.</ref><ref>Haining, Peter 2002. ''The Flying Bomb War: contemporary eyewitness accounts of the German V1 and V2 raids on Britain 1942–1945''. London: Robson Books. ISBN 978-1-86105-581-1</ref> It was a flying bomb, an early cruise [[