
The Hiller Model 1033 was a one man, foldable, self-rescue and observation helicopter. Two prototypes built for the US Navy.
Additional 10 units build in England as Saunders Roe G-46






The YOH-5 was designed for the US Army LOH competition and lost against the Hughes OH-6, but 246 units were built for the civilian market
- Crew: 1+4
- Length: 8.50 m
- Rotor diameter: 10.80 m
- Height: 2.80 m
- Weight: 621 kg / 1247 kg
- Powerplant: 1 × Allison 250 turboshaft
- Speed: 105 knots
- Range: 560 km



Designed from the X-18, was the winner of a contract for a tri-service VTOL transport plane.
With a max weight of 19000 Kg and a top speed of 690 Km/h remains the largest VTOL aircraft ever to fly until the development of the V-22 Osprey. Only 5 units were built







