Tag: igor sikorsky

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Things Pathfinder-tagged with 'igor sikorsky'

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October 16, 1943 - The U.S. Navy's First Helicopter
from "On This Day" In Engineering History posted in General Discussion
Pathfinder Tags: Hoverfly igor sikorsky October 16 R-4 Sikorsky YR-4B
Created on 10/16/2007 10:25 AM
by Steve Melito
May 24, 1940 – Sikorsky’s Helicopter Flight
from "On This Day" In Engineering History posted in General Discussion
Pathfinder Tags: aviation helicopters igor sikorsky May 24 powered flight
Created on 05/25/2007 6:00 AM
by Steve Melito
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