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Aviation History
1945
1945 - 0904.PDF
FLIGHT MAY IOTH, 1945 \ (Left) Tail end. Trim and balance tabs are fitted to allcontrol surfaces. Tail gun emplacement is of very poor design. (Right) Above the " Prise de Guerre " is the reardorsal turret whilst the front dorsal remote barbette and its sighting station are above the centre-section. HEINKEL He177 slab sides. The latter are stressed skin on major and secondary frames with- out stringers, the frames being 'of lipped angle section of heavy and light gauge. Top, or roof, panels are skinned on lipped angle frames notched for passage of the Z-section extruded stringers, and are attached to the side panels through rolled lipped-angle longerons. Bottom panels are similar in construction to the roof panels, but are attached to the side panels at the heavy extruded Z-section lower longerons. At the front end of the middle fuse- lage compartment the rear-dorsal gun- ner sits in a swing seat suspended from his gun mounting ring. This gun, a 13 mm., is electrically rotated but hand elevated, and is fed from large capacity ammunition boxes on the port side, expended shell cases being evacuated through a flexible duct leading to a hole in the floor. As stated, four of the crew occupy the main nose cabin of the aircraft and, by the size of it, they must be fairly cramped. To British eyes the control layout is "bitty," and no R.A.F.-trained pilot would feel happy with it. A 20 mm. gun gimbal is mounted through the front of the nose glazing, and the bomb sight is carried beneath it in the floor. In the roof behind the pilots sits the front dorsal gunner, this position being a sighting station for the two 13 mm. guns carried in a barbette further aft and remotely controlled electrically. On the rear bulkhead +he radio sets are mounted, and the operator also fires the Engine, ancillary service and flying instruments for the second pilot are mounted along the starboard wall. single. 20 mm. and 13 mm. guns carried in ventral mount- ings in the floor. With an aspect ratio of 9.9 for a wing area of 1,076 sq. ft., the Heinkel 177 has a wing loading of 63.6 lb./sq. ft. at an all-up weight of 68,500 lb. .Empty weight is 37,000 lb. Ratings for emergency and take-off a*e" 3,100 b.h.p. for 2,800 r.p.m. and +5.5 lb. boost at 6,900ft. Maximum continuous power is 2,260 b.h.p. at 2,300 r.p.m. and +1.7 lb. boost at 6,900ft., and economical cruising 1,780 b.h.p. at 2,100 r.p.m. and -0.41 lb. boost at 18,700ft. For take-off at 68,500 1b. the aircraft unsticks at 115 m.p.h. within the very reasonable distance of 1,140 yards, and- climbs at 171 m.p.h.
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