McDonnell XH-20 Little Henry

https://en.wikipedia.org/wiki/McDonn...0_Little_Henry

The McDonnell XH-20 Little Henry was a 1940s American experimental lightweight
helicopter designed and built by McDonnell Aircraft.

The McDonnell Model 38 was a lightweight experimental helicopter sponsored by
the United States Army Air Force to test the concept of using small ramjets at
the tips of the rotor blades. As a functional helicopter it was of simple
open-frame steel-tube construction. Allocated the military designation XH-20 the
first of two first flew on the 29 August 1947.

Although the XH-20 flew successfully the ramjets were noisy and burnt a large
amount of fuel and plans to build a larger two-seat XH-29 were abandoned.


Role
Experimental ramjet-rotor powered helicopter

National origin
United States

Manufacturer
McDonnell Aircraft

First flight
29 August 1947

Primary user
United States Air Force

Number built
2

Specifications

General characteristics
Crew: 1
Length: 12 ft 6 in (3.81 m)
Height: 6 ft 8 in (2.03 m)
Empty weight: 290 lb (132 kg)
Powerplant: 2 × McDonnell Ramjets
Main rotor diameter: 20 ft (6.1 m)

Performance
Maximum speed: 50 mph (80 km/h; 43 kn)




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