The wing of the Douglas B-19 nearing completion in its steel jig. The tail section is at lower right. [ photo ]
The nacelle skin of the B-19 is Alclad of approximately .040 gauqe. The engine mount is of the new Lord "Dynafocal" type. with stainless-steel tube members running from the shock units to the individual cylinder heads. The cylinder head ttachment fitting is a special forging. The shock absorber fittings are three-piece dural castings, with one piece for the attachment to the bulkhead. and two pieces for clamping around the rubber shock absorbing units. The stiffeners of the nacelle are bulb-angle extruded sections except at each shock unit mounting where two "C" sections are used together to give added strength to carry the engine loads back into the nacelle structure. The nacelle is flush-riveted throughout with dural rivets countersunk where sections are heavy and counter-punched where skin is attached to skin- (or thin-) section members. [ drawing ]
Hoisting one of the four 2,000-horsepower Wright Duplex Cyclone engines into place. These engines will swing 16' diameter propellers that were recently developed. [ photo ]
A closeup of the tail section shows the rear gun turret position and the full cantilever construction of the fin and stabilizers. [ photo ]
The control cabin gives some idea of the size of the B-19. Here are ten men working, and all with ample room. in the forward part of the cabin, with a space much larger than this below the floor. The wing span of the ship is 210' and it will weigh, fully loaded, more than 140,000 lb. The load capacity is some 56,000 lb and the airplane is built for range and armament rather than speed, a lesson learned from the war. [ photo ]
Most of the wing was constructed while in a vertical steel jig. The nacelles are large enough for a member of the crew to repair the engines while in flight, with access through the wing. [ photo ]
A view inboard from near the left wing tip shows the wing to be set at a rather high angle of incidence. The main spar of the wing in general is of box beam construction with corrugated aluminum alloy forming the top and bottom. It has a tricycle landing gear. [ photo ]
This pictorial article was originally published in the October, 4010, issue of Aviation magazine, vol 39, no 10, pp 58-59.
The article consists of 7 captioned photos.
Photos are not credited, but are certainly from Douglas.