The Blue Yonder EZ Fun Flyer is a Canadian twin-engined ultralight aircraft that was designed by Wayne Winters and is produced by Blue Yonder Aviation of Indus, Alberta. The aircraft is supplied as a kit for amateur construction.^[1]

Design and development

Even though it is a Canadian design, the aircraft was designed to comply with the US FAR 103 Ultralight Vehicles rules, including the category's maximum empty weight of 254 lb (115 kg). The aircraft has a standard empty weight of 251 lb (114 kg). It features a strut-braced high-wing, inverted V-tail, a single-seat, open cockpit, conventional landing gear and twin engines in tractor configuration. The EZ Fun Flyer closely resembles the Ultraflight Lazair in configuration and dimensions.^[1]

The aircraft structure is made from aluminum tubing, with foam wing ribs. Its 34 ft (10.4 m) span wing is supported by a single lift strut per side. The engines are Radne Raket 120 single cylinder, 120cc, air-cooled, two stroke powered hang glider powerplants of 14 hp (10 kW) each, which give a cruise speed of 50 mph (80 km/h) and a rate of climb of 400 ft/min (2.0 m/s).^[1][2]

The construction time from the supplied kit is estimated by the designer at 160 hours.^[1]

Operational history

Only one example has been registered in Canada.^[3][4]

Specifications (EZ Fun Flyer)

Data from KitPlanes^[1]

General characteristics

• Crew: one
• Length: 15 ft (4.6 m)
• Wingspan: 34 ft (10 m)
• Wing area: 146 sq ft (13.6 m²)
• Empty weight: 251 lb (114 kg)
• Gross weight: 600 lb (272 kg)
• Fuel capacity: 6 U.S. gallons (23 L; 5.0 imp gal)
• Powerplant: 2 × Radne Raket 120 single-cylinder, two-stroke, 120cc, air-cooled powered hang glider engines, 14 hp (10 kW) each

Performance

• Cruise speed: 50 mph (80 km/h, 43 kn)
• Stall speed: 17 mph (27 km/h, 15 kn)
• Range: 100 mi (160 km, 87 nmi)
• Rate of climb: 400 ft/min (2.0 m/s)