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#7
March 26th 05, 05:43 PM
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"Montblack" wrote in message
... Aluminum will weigh 5 x the mahogany? Wow. Specific gravity of Aluminum = 2.7 Specific gravity of Mahogany = ~.5 What's the cost difference between aluminum and wooden props? New Ed Sterba Birch prop ~ $600. New Sensenich Aluminum $2,000. These are rough figures. Why do people buy birch instead of mahogany? Birch has a specific gravity ~ .7 and is a lot stronger per pound than Mahogany when used for a prop. Rich S. 
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