Nelson Hummingbird PG-185B
Nelson Hummingbird PG 185-B.
Designed by Harry Perl & Ted Nelson, Nelson developed the Hummingbird in 1953 after discontinuing the Dragonfly. It is a two-place tandem self-launching sailplane. The fixed gear is two wheels in tandem, the front one steerable with rudder pedals. It features an all-moving horizontal tail with anti-balance tab, spoilers and dive brakes, and styrofoam-filled leading edges. The original version, of which two were built, was almost all wood; later models were metal.
Built by the Nelson Aircraft Corporation of Irwin, Pennsylvania, which firm also makes the 45hp Nelson H-63CP four-cylinder horizontally-opposed two-stroke engine that powers it. This is mounted aft of the cockpit and drives a two-blade fixed-pitch pusher propeller; it retracts forward into the fuselage behind the one-piece tear drop cockpit canopy when not in use.
Two belong to the National Soaring Museum, and one belongs to the Smitsonian Air & Space Museum, Washington.
The Hummingbird is a tandem two-seater glider
Engine: 40 kW/ 40 bhp. Nelson H-59
Span: 54 ft 0 in / 16.46m
Length: 22 ft 0 in
Wing area: 185.0 sqft / 17.18sq.m
Aspect ratio: 15.76
Airfoil: Go 549 (root), Go 676 (tip)
Empty Weight: 363kg / 800lb
Gross Weight: 544kg / 1200 lb
Cruising speed: 80mph
MinSink: 25 at 89 kph / 48 kt / 55 mph
L/DMax: 0.91 m/s / 3.0 fps / 1.78kt