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Old 11-09-2021, 05:19 PM
claycookiemonster's Avatar
claycookiemonster claycookiemonster is offline
Join Date: Oct 2007
Location: Midway, UT
Posts: 560
Default Prop extensions?

Both the Showplanes and James cowls require a prop extension. I've been going back and forth between Aerosport Power and Whirlwind to make sure everyone is ok with this. Now, Whirlwind is balking a bit at mounting their new 3-blade prop on an extension. I contacted the manufacturer of the extension, Sabre Manufacturing, and they said they make a 3" extension used in Red Bull races with 60lb props pulling 10 G's. They don't think this is any problem for me.

I understand manufacturers being hesitant to endorse ANYTHING GOES, but is this a real road block, or just the reality of Experimental airplanes and new combinations? I'm not EVER going to do anything close to the Red Bull guys, so I can talk myself into this. On the other hand, I have no desire to really approach the edge of safety and wisdom.

Anyone with prop extension experience have any perspective on this?
Clay "Cookiemonster" Cook
USAF: T-38, F-111F
American Airlines: 727, MD80, 757, 767, 737
RV8 #81751 project sold
RV8 #81651 project acquired
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