5.6 KiB
| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| V-1 flying bomb | 3/11 | https://en.wikipedia.org/wiki/V-1_flying_bomb | reference | science, encyclopedia | 2026-05-05T13:26:18.502881+00:00 | kb-cron |
The Walter catapult accelerated the V-1 to a launch speed of 320 km/h (200 mph), well above the needed minimum operational speed of 240 km/h (150 mph). The V-1 reached the British coast at 550 km/h (340 mph), but continued to accelerate to 640 km/h (400 mph) by the time it reached London, as its 570 L (150 US gal) of fuel burned off. On 18 June 1943 Hermann Göring decided on launching the V-1, using the Walter catapult, in large launch bunkers, called Wasserwerk (the German word for "water works"), and lighter installations, called the Stellungsystem. The Wasserwerk bunker measured 215 m (705 ft) long, 36 m (118 ft) wide, and 10 m (33 ft) high. Four were initially to be built: Wasserwerk Desvres, Wasserwerk St. Pol, Wasserwerk Valognes, and Wasserwerk Cherbourg. Stellungsystem-I was to be operated by Flak Regiment 155(W), with 4 launch battalions, each having 4 launchers, and located in the Pas-de-Calais region. Stellungsystem-II, with 32 sites, was to act as a reserve unit. Stellungsystem-I and II had nine batteries manned by February 1944. Stellungsystem-III, operated by FR 255(W), was to be organized in the spring of 1944, and located between Rouen and Caen. The Stellungsystem locations included distinctive catapult walls pointed towards London, several J-shaped stowage buildings referred to as "ski" buildings as on aerial reconnaissance photographs the buildings looked like a ski on its side, and a compass correction building which was constructed without ferrous metal. In the spring of 1944, Oberst Schmalschläger had developed a more simplified launching site, called Einsatzstellungen (meaning ca. "deployed emplacement"). Less conspicuous, 80 launch sites and 16 support sites were located from Calais to Normandy. Each site took only two weeks to construct, using 40 men, and the Walter catapult only took 7–8 days to erect, when the time was ready to make it operational. Once near the launch ramp, the wing spar and wings were attached and the missile was slid off the loading trolley, Zubringerwagen, onto the launch ramp. The ramp catapult was powered by the Dampferzeuger trolley. The pulse-jet engine was started by the Anlassgerät, which provided compressed air for the engine intake, and initial electrical supply for the engine spark plug, and autopilot. The Bosch spark plug was only needed to start the engine, while residual flame ignited further mixtures of gasoline and air, and the engine would be at full power after 7 seconds. The catapult would then accelerate the bomb above its stall speed of 320 km/h (200 mph), ensuring sufficient ram air.
== Operation Eisbär ==
Mass production of the FZG-76 did not start until the spring of 1944, and FR 155(W) was not equipped until late May 1944. Operation Eisbär, the missile attacks on London, commenced on 12 June. However, the four launch battalions could only operate from the Pas-de-Calais area, amounting to only 72 launchers. They had been supplied with missiles, Walter catapults, fuel, and other associated equipment since D-Day. None of the nine missiles launched on the 12th reached England, while only four did so on the 13th. The next attempt to start the attack occurred on the night of 15/16 June, when 144 missiles reached England, of which 73 struck London, while 53 struck Portsmouth and Southampton. Damage was widespread and Eisenhower ordered attacks on the V-1 sites as a priority. Operation Cobra forced a retreat from the French launch sites in August, with the last battalion leaving on 29 August. Operation Donnerschlag began from Germany on 21 October 1944.
== Operation and effectiveness ==
The first complete V-1 airframe was delivered on 30 August 1942, and after the first complete As.109-014 was delivered in September, the first glide test flight was on 28 October 1942 at Peenemünde, from under a Focke-Wulf Fw 200. The first powered trial was on 10 December, launched from beneath an He 111. The LXV Armeekorps z.b.V. ("65th Army Corps for special deployment) formed during the last days of November 1943 in France commanded by General der Artillerie z.V. Erich Heinemann was responsible for the operational use of V-1.
The conventional launch sites could theoretically launch about 15 V-1s per day, but this rate was difficult to achieve on a consistent basis; the maximum rate achieved was 18. Overall, only about 25% of the V-1s hit their targets, the majority being lost due to a combination of defensive measures, mechanical unreliability, or guidance errors. At least six V-1s are known to have landed erroneously in Sweden. With the capture or destruction of the launch facilities used to attack England, the V-1s were employed in attacks against strategic points in Belgium, primarily the port of Antwerp. Launches against Britain were met by a variety of countermeasures, including barrage balloons and aircraft such as the Hawker Tempest and newly introduced jet Gloster Meteor. These measures were so successful that by August 1944 about 80% of V-1s were being destroyed The Meteors suffered from frequent cannon failures, and accounted for only 13 V-1s destroyed. In all, about 1,000 V-1s were destroyed by aircraft. The intended operational altitude was originally set at 2,750 m (9,000 ft), but repeated failures of a barometric fuel-pressure regulator led to the operational height being halved in May 1944, bringing V-1s into range of the 40 mm Bofors light anti-aircraft guns commonly used by Allied AA units.