This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Collection Item Summary:
Charles M. Olmsted, a European trained physicist from Upstate New York, had an interest in flight from his early years. His success with gliders in the 1890's led to the formation of the Buffalo-Pitts-Olmsted Syndicate in 1910 to develop aircraft. Following failure of the related agricultural equipment manufacturing company, Olmsted formed the CMO Physical Laboratory, continuing to manufacture and sell his ultra-efficient propellers. Olmsted designs differed from other propellers, having a large surface near the blade base and very little surface at the tip. Olmsted's propellers represented a fundamental difference in design philosophy that has not been duplicated by any other designer.
This artifact is a right-turning tractor propeller designed in 1916 for the famous World War I Curtiss JN-4 "Jenny" training aircraft. However, it was not deemed by the Army to be any better than the ordinary type for tractor purposes and, therefore, not mass produced.
Collection Item Long Description:
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Country of Origin
- Type: Two-blade, fixed-pitch, maple.
- Diameter: 292 cm (115 in.)
- Chord: 46 cm (18 in.)
- Engine Application: Curtiss OX-5, V-8, liquid cooled, 75 kw (100 hp)