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Old 4th Nov 2012, 21:41
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barit1
 
Join Date: Feb 2005
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R-1340 prop speeds
There are both direct-drive and geared (3/2) versions; the direct-drive model is much more common. The geared version (R-1340-AN-2) was built primarily for large blimps, with oversize prop for low-speed efficiency.
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