Intended for advanced training, it was equipped with a powerful 187 kW (250 hp) engine.
This was a strengthened bicycle, with a 1.1 kW (1.5 hp) engine driving the rear wheel.
The smallest, to power a 12 kW engine for a fishing boat, is light and compact.
The design is powered by 390 kW engines, and has a top speed of 140 km/h.
However, these refinements made the aircraft too heavy to fly with its 37 kW (50 hp) engine.
It includes a more powerful 530 kW engine, and a different fire control system built by Kollsman.
The cable used has a diameter of 28 mm and it is driven by a 40 kW engine in the valley station.
It will have a 120 kW (160 hp) engine, seven-hour endurance.
Original prototype helicopter with two 164 kW engines mounted at the end of outriggers.
The aircraft uses coaxial rotors and a 45 kW engine.