In 1928 Hartland Engine & Machine co built a 7-cylinder air-cooled radial aero engine, designed by Nick Rowinski, which produced 125hp.
Piston
Hart Aero Zipster

Plans and manual on CD $25 Printed plans and Manaul $75 Materials Kits $3495 Quick Build Kit $4795 Deluxe Kit $5995 Partial kits available along with many options.
Stall: 23 kt / 27 mph / 43 kmh
Cruise: 55 kt / 63 mph / 101 kmh
VNE: 78 kt / 90 mph / 145 kmh
Empty Weight: 113 kg / 249 lbs
MTOW Weight: 249 kg / 550 lbs
Climb Ratio: 450 ft/min / 2 m/s
Take-off distance (50ft obstacle): 600 ft / 183 m
Landing distance (50ft obstacle): 600 ft / 183 m
Hart Aero Aero Sport

The Hart Aero Sport is our answer to the cry for an FAA legal, safe, three axis, back to basics aircraft that fits the Ultralight category using a Rotax 447 or the new Light Sport Aircraft and Sport Pilot rules using a Rotax 447 or Rotax 503. With three axis controls and dual controls, it handles just like a “real” airplane. The Hart Aero Sport is a full three axis aircraft with a center mount stick & is covered with the certified poly fiber or ceconite process. This kit comes ready to assemble with all machining & required welding pre-done. Assembly time is normally around 100/200 man hours depending on experience. Price 2009: 4999 US$
Stall: 22 kt / 25 mph / 41 kmh
Cruise: 70 kt / 81 mph / 130 kmh
VNE: 100 kt / 115 mph / 185 kmh
Empty Weight: 125 kg / 275 lbs
MTOW Weight: 261 kg / 575 lbs
Climb Ratio: 1000 ft/min / 5 m/s
Glide Ratio: 16:1
Take-off distance (50ft obstacle): 250 ft / 76 m
Landing distance (50ft obstacle): 250 ft / 76 m
Hart Aero Lite Flyer Biplane

The Lite Flyer Biplane is Hart Aero’s FAA legal, three axis dual control, back to basics aircraft that fits the new Light Sport Aircraft and Sport Pilot rules. With three axis controls and dual controls, it handles just like a “real” airplane, the Lite Flyer has a center mount stick & is covered with the certified poly fiber process. This kit comes ready to assemble with all machining & required welding pre-done. Assembly time is normally around 100/200 man hours depending on experience. Price 2009: 6499 US$
Stall: 24 kt / 28 mph / 44 kmh
Cruise: 60 kt / 69 mph / 111 kmh
VNE: 100 kt / 115 mph / 185 kmh
Empty Weight: 142 kg / 312 lbs
MTOW Weight: 357 kg / 787 lbs
Climb Ratio: 750 ft/min / 4 m/s
Glide Ratio: 12:1
Take-off distance (50ft obstacle): 300 ft / 91 m
Landing distance (50ft obstacle): 300 ft / 91 m
Hart Aero Aero Trainer

The Aero Trainer is Hart Aero’s FAA legal, three axis dual control, back to basics light sport training aircraft With three axis controls and dual controls, with a center mount stick & is covered with the certified poly fiber or ceconite process. This kit comes ready to assemble with all machining & required welding pre-done. Assembly time is normally around 100/200 man hours depending on experience. 2009 Price: 5999 US$
Stall: 25 kt / 29 mph / 46 kmh
Cruise: 65 kt / 75 mph / 120 kmh
VNE: 100 kt / 115 mph / 185 kmh
Empty Weight: 135 kg / 297 lbs
MTOW Weight: 352 kg / 775 lbs
Climb Ratio: 900 ft/min / 5 m/s
Glide Ratio: 14:1
Take-off distance (50ft obstacle): 250 ft / 76 m
Landing distance (50ft obstacle): 250 ft / 76 m
Hart 1912 Racing Monoplane

William Ewart Hart in Australia, had in 1912 an experimental racing monoplane.
Harroun 1911 Monoplane

A monoplane powered by a 24 hp 2-cylinder engine, built by Ray Harroun in partnership with Carl S. Bates of the Bates Engineering Co. of Chicago. Construction was steel tubing, and it was stated that the fuselage was covered by aluminum sheet. Total weight was said to be 460 pounds. Supposedly 5 other monoplanes were under construction at the time.
Harris Spitfire

Harry Harris of Tauranga, New Zealand, constructed his own 2/3 scale Spitfire. First flying in 2002. The fiberglass microlight features a hydraulic gear retraction.
For sale in Feb 2014, the asking price was NZ$23,000

Engine: Rotax 582, 65 hp
Prop: Warp Drive 3 Blade
Cruise: 85 kts.
Fuel capacity: 50lt
Fuel burn: 13lt per Hr

Harris LW-108 Geodetic
The LW-108 offers the comfort of side-by-side seating under an enclosed canopy. Possibly the most outstanding feature of this low-wing taildragger is its unique geodetically-constructed fuselage. It is said to be both lightweight and economical to build, while providing exceptional strength without sacrificing a low-drag fuselage shape. The framework is all spruce and plywood.
Gross Wt. 1000 lb
Empty Wt. 585 lb
Fue1 capacity 16 USG
Wingspan 28’l”
Length 19’4”
Engine 80hp Con¬tinental.
Top speed 150 mph
Cruise 130 mph.
Stall 40 mph
Climb rate 1500 fpm
Takeoff run 500 ft
Range 400 miles
Harris B-1
The Harris B-1 was a 90-112 hp 8-cylinder Vee configuration water cooled aero engine. It received ATC 22.