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Old 09-16-2008, 06:07 AM
IvanK IvanK is offline
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Join Date: Oct 2007
Location: Australia
Posts: 886
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As in my previous post:

Spitfires were the first to be converted commencing on 24June 1940.
All Spitfires,Hurricanes and were converted to Constant Speed units by 16August 1940.
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