The Focke-Achgelis Fa 269. Another German Wonder Plane.

by Daniel Russ on May 12, 2016




It comes as no surprise to me to find that the Germans in World War II were also developing concept aircraft for Vertical Take Off and Landing functionality. The idea of course was that the runway wasas difficult to build and easy to target and harder to defend.


Heinrich Focke in 1941 designed the Focke-Achgelis Fa 269, a single seat tilt rotor aircraft with a high nose clearance and low tail clearance.


The only reason their prototype couldn’t be flown was that the Allies were hitting factories hard and apparently disrupted this aircraft


Two engines were to have been mounted on the wings beyond mid span and these would have driven very-large-diameter pusher propellers. For level flight these propellers would have been used in the orthodox position but for take-off and landing they would have pivoted downward and forward through about 85°. Actual propeller diameter would have been approximately equal to the aircraft’s semi-span. At the front of each engine there was a special pivoting gearbox, from which a drive shaft passed back between the engine cylinder banks to drive its propeller aft of the wing trailing edge. The whole of each shaft could be pivoted at the wing leading edge and out of the recess in the engine and wing, to swing its propeller beneath the wing. In the fully-down position, the plane of the propellers was almost parallel with the ground when the aircraft was at rest, and a very long tailwheel undercarriage, which retracted into the fuselage, was necessary because of the length of the drive shafts. Considerable development would have been needed for the special engines, gearboxes, drives and power-pivoting mechanisms, not to mention the propeller pitch-control system for use when landing and taking-off (when the conventional control surfaces would be ineffective). The project, apparently, did not have sufficient priority for development to be undertaken at this stage of the war, and no prototype was built. The only known data for the Fa 269 is that the design horizontal speed was 600km/h.

J.R.Smith, Antony L. Kay “German Aircraft of the Second World War”, 1972

And there is this comment in the thread of this blog

Barry, 22.09.2010

Powered by a BMW 801 buried in the fuselage the Fa 269 was designed to have a maximum speed of 570 km/h. The span would have been 10,00m with a length of 8,93m and a height of 3,23 with an armament of 2 x 30mm MK 108 cannon. Even before all the designs and models were destroyed in air raids and all development work was shelved in 1944, the earliest estimates for a flying example was 1947.
When one considers the problems encountered with the Boeing Bell Osprey some 40 to 50 years later even 1947 seems optimistic!




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