A WARBIRDS RESOURCE
GROUP WEBSITE
Warbird discussion forums
Warbirds-Online
Warbird News and commentary.
Warbird Registry
The histories of individual warbirds.
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HELICOPTERS
Aircraft are catagorized according to there maiden flight. Thier service life would often carry them between the era used.
1939-1945:
Sikorsky HNS
Sikorsky HO3
1946-1962:
Sikorsky HO4S
Sikorsky HSS-1 Seabat
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