propellor design

Date:         03 Jan 97 04:36:35 
From:         pmacdou367@aol.com (PMacdou367)
Organization: AOL, http://www.aol.co.uk
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Can anyone explain the design differences between the Hamilton Satndard
propellors used on the C130 Hercules and the P-3 Orion which use faily
similar engines (T56-A-14/-15)? ie the P-3 uses rounded prop tips and the
C130 uses square prop tips, what are the reasons?

Thanks

Paul