The "Boon Jr" single-seat helicopter has been rebuilt twice by its 75yr-old designer, Mr A. Weilage of California, with the object of developing an inexpensive helicopter for missionary access to remote spots. Seen here at the recent Flabob EAA Fly-in, the aircraft now has a 102hp converted VW engine providing a cruise speed of 120km/h and a 400km range. Construction time was 250hr with no welding involved — all components are bolted together.

"Flight", 20 April 1972

The Weilage Boon was an American two-seater side-by-side light helicopter developed for use by missionaries during the 1960's. The Weilage Boon was powered by a Lycoming O-235-C four-cylinder horizontally-opposed air-cooled engine providing a top speed of 185km/h.

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