Invader Mark III ultralight aircraft, by Ultra-Efficient Products, Ultralight Aircraft Magazine.
Ultra-Efficient Products, Invader Mark III
Ultralight Aircraft Magazine - The Mark III invader was originally designed by Nick Leighty and Rick Berstling in 1982, as a part 103 legal ultralight aircraft. It uses a welded aluminum tube construction in the fuselage, mated to a double sleeved aluminum irrigation pipe extending out to the the V tail. The wings are constructed from wood using foam ribs covered in standard aircraft covering materials.
Early model Mark III Ivaders for two axis control, with all of the controls working off of the control stick, in later models rudder pedals were added. The aircraft is a pusher, in a mid-wing configuration, with a tricycle gear, and a steerable nose wheel.
The Mark III invader can be powered by engines ranging from 14 to 36 hp. These include the 14 hp single cylinder yeah my engine on up through the Rotax 377 and 447.
Problems were reported with separation of the ribs from the main spar.
Mark III invader Part 103 Legal Ultralight Aircraft
Mark III invader can be powered by engines ranging from 14 to 36 hp. These include the 14 hp single cylinder yeah my engine on up through the Rotax 377 and 447. Problems were reported with separation of the ribs from the main spar.
Invader Mark III Ultralight Aircraft Specifications And Images
Length: 18 ft (5.5 m)
Wingspan: 31 ft (9.4 m)
Height: 4 ft (1.2 m)
Wing area: 140 sq ft (13 m2)
Empty weight: 245 lb (111 kg)
Gross weight: 475 lb (215 kg)
Fuel capacity: 2.5 U.S. gallons (9.5 L; 2.1 imp gal)
Powerplant: 1 × Yamaha , 14 hp (10 kW)
Performance
Cruise speed: 40 mph (35 kn; 64 km/h)
Stall speed: 20 mph (17 kn; 32 km/h)
Range: 100 mi (87 nmi; 161 km)
Service ceiling: 4,000 ft (1,219 m)
G limits: +4/-4
Maximum glide ratio: 14:1
Rate of climb: 500 ft/min (2.5 m/s)
The Mark III invader was originally designed by Nick Leighty and Rick Berstling in 1982, as a part 103 legal ultralight aircraft. It uses a welded aluminum tube construction in the fuselage, mated to a double sleeved aluminum irrigation pipe extending out to the the V tail. The wings are constructed from wood using foam ribs covered in standard aircraft covering materials.
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