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By: 24th March 2014 at 19:54 Permalink - Edited 1st January 1970 at 01:00
-I believe the rounded tips help reduce vibrations and make the P-3 quieter than its square-tipped counterparts.
By: 24th March 2014 at 20:00 Permalink - Edited 1st January 1970 at 01:00
-Thanks for that, I knew somebody would have the answer !
By: 24th March 2014 at 20:21 Permalink - Edited 1st January 1970 at 01:00
-http://www.pprune.org/tech-log/100428-prop-shapes.html
Squared off tips are less efficient, but allow higher solidity and therefore more power can be delivered to the airflow by a propeller of given diameter.C130 - short field takeoff is a primary performance requirement, so high power output is necessary.
P-3 - oceanic endurance is a primary performance requirement, so efficiency becomes the overriding concern.
All the above is just off the top of my head, so I await correction.
By: 24th March 2014 at 21:25 Permalink - Edited 1st January 1970 at 01:00
-Interesting reading, I am glad that I wasn't the only one that didn't know why !
By: 24th March 2014 at 23:39 Permalink - Edited 1st January 1970 at 01:00
-I used to round the tips of my RC aircraft propellors. That would quiet them down a little bit.
Posts: 299
By: Argonaut - 24th March 2014 at 19:53
I am sure somebody on here will know the answer. I am no expert on engines but just wondering why the Electra has square tips on the props and the Orion has rounded tips. Just noticed this now, after all these years, with the amount of TV footage of the P3s in Perth.