Huffman 1

This aircraft was designed and built by Mike Huffman during the late 1960s and early 1970s. It featured a welded steel-tube fuselage, aluminum wings and tail boom, and composite tail surfaces. Powered by a McCulloch 72-hp target drone engine, it was essentially an ultralight before the ultralight movement began.

Huff-Daland XLB-1

Keystone Aircraft Corpora¬tion built a total of 220 aircraft in the US Army Air Corps LB (light bombardment) category, venturing briefly also into the B (bombardment) and HB (heavy bombardment) classifications. All except ten of the LBs were twin engined aircraft, but had their origins in the single–engined XLB 1 prototype and nine pre series LB 1 biplanes produced in 1925 by Key¬stone’s predecessor company, Huff Daland and Co Inc of Ogdensburg, New York, which became Keystone in March 1927.

The XLB-1 three-seat, single-engine light bomber was tested in 1923, mount¬ing an 800 hp Packard and was developed as the twin-engined XLB-3, with a crew of five. The basic LB 1 airframe was redesigned by Keystone in 1927 as the twin engined XLB¬3A.

Hubertec Thermik

The Hubertec Thermik (English: Thermal) is a German ultralight trike, designed and produced by Hubertec of Aach, Rhineland-Palatinate. The aircraft was supplied as a complete ready-to-fly-aircraft.

The company is an industrial prototyping and exercise machine specialist that decided to produce an ultralight trike design as a sideline project.

HPK SP-1

Designed and built by Harold Hayden, Robert Kinney, Arthur Payne and Reno Benner in their spare time, over about five years, near Bristol, PA, USA.

Fuel is carried in the wing tips. Flaps are fitted.

Engine: Lycoming O-235-C1, 115 hp
Wing span: 25 ft
Wing area: 99 sq.ft
Length: 19.1 ft
Height: 8 ft 1 in
Gross weight: 1300 lb
Fuel capacity: 36 USG
Cruise: 145 mph
Wing loading: 13 lb/sq.ft
TO dist: 400 ft
Stall: 50 mph

Howland H-4 Chimp

Speed max: 100 mph.
Cruise: 63 mph.
Range: 100 sm.
Stall: 31 mph.
ROC: 650 fpm.
Take-off dist: 200 ft.
Landing dist: 250 ft.
Service ceiling: 14,000 ft.
Engine: Rotax 377, 35 hp.
HP range: 35-65.
Fuel cap: 5 USG.
Weight empty: 315 lbs.
Gross: 550 lbs.
Height: 6 ft.
Wing span: 28 ft.
Wing area: 112 sq.ft.
Seats: 1.
Landing gear: tail wheel.