McDonnell XH-20 Little Henry


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

Development

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. Allotted 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.

Variants

Data from: U.S.Military Aircraft Designations and Serials since 1909
;XH-29
;XH-20
;McDonnell Model 38:experimental lightweight helicopter, two built.
;McDonnell Model 79:a proposed two-seat development, cancelled.

Operator