Turnbull's Controllable-pitch Propeller Now Tested
June 29 1927

wallace turnbull
propeller
science
aviation


Description
First test of Wallace Turnbull's controllable-pitch propeller.
Location
References
Controllable-pitch propellerexternal
Wallace Turnbullexternal
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Created By: johnny
Created On: 2015-04-30T22:35:37Z

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