Lembaga Industri Penerbangan Nurtanio NU-85 / NU-90 Belalang
This aircraft is a low-wing conversion of the Piper Cub L-4J.
The prototype, designated NU-85, flew on April 17, 1958, and proved to be such an improvement over the original L-4J that the Indonesian Air Force was having all its L-4Js converted into Belalangs, with the production designation NU-90.
The programme was started in 1959 and the NU-90 became the standard primary trainer at the Air Force Flying School.
Engine: Continental C90-12F, 90 hp
Span: 31 ft l in
Length: 25 ft 3 in
Height: 6 ft 8 in
Wing area: 161.5 sq.ft
Gross weight: l,500 lb
Empty weight: l,038 lb
Max speed: 115 mph
Cruising speed: 90 mph
Max rate of climb at SL: 600 ft/min
Service ceilmg: 12,000 ft
TO run: 500 ft
Landing run: 400 ft
Range: 350 miles