Flight Report Fw 190/665
Nr. 6
Bad Eilsan 

Condition: Engine BMW 801 D 2/25453.
Tight engine cowl.
Split flaps with reinforced actuator.
Armament: 2 MG 17, MG 2 151 without ammunition.
MG -FF – belt hatch. Actuated wheel doors.
Armored ring mounting in accordance with BSK 190.6-941.
Rudder bell crank in accordance with KBV 25326
(20° - rudder deflection, Ü ~ 1: 1.5).
Direct 551 pound (250 kg) bomb mounting with support struts,
BS 72325 (wooden bombs)
Maintenance-free landing gear shock struts 38.3803.


1. Investigation of flying qualities, particularly around the longitudinal axis, with direct mounting of a 551 pound (250 kg) wooden bomb on each wing.
2. Determination of the speed loss from the wing bombs, including mounting.
3. Endurance testing of the armored ring mounting.
4. Assessment of maintenance-free air shock struts.


1. The aileron shaking phenomena described in the previous flight report was eliminated, due to an increase in the distance between the wing underside and the bomb. The bomb struts now required to contain the lateral forces showed no vortex shedding in the dive.
2. As the accompanying graph shows, a loss of level speed with combat power of ~31 mph (50 km/h) is caused by the two 551 pound (250 kg) wing bombs with mountings. Based on previous measurements, a speed reduction of up to 9 mph (15 km/h) is expected from the fuselage bomb on ETC 501 rack, so that overall the machine is likely to be 40 mph (65 km/h) slower in the approach flight than on the return flight after dropping the bombs. The true air speeds with n = 2400 rpm are therefore as follows:

Sea level Full throttle height
Approach flight with bombs: 292 mph (470 km/h) 354 mph (570 km/h)
Return flight without bombs: 332 mph (535 km/h) 395 mph (635 km/h)

3. The armored ring mounting, in accordance with BSK 941, has been flown ~30 hours without faults.
4. An assessment of the air shock struts cannot be submitted because they already bottomed out with average roll bumps. In the subsequent examination, strut pressures were found to be only ~70 instead of 95 atü.

Langenhagen, 16.6.1943

Level speed with combat power


Flugbericht Fw 190/665 Nr. 6 (pdf)

Translation by Jörn Dietrich and Mike Williams

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