Mailing List flyrotary@lancaironline.net Message #15755
From: Tracy Crook <lors01@msn.com>
Subject: Re: [FlyRotary] Re: 4000FPM
Date: Fri, 21 Jan 2005 23:58:34 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Actually, that is a conservative estimate.  The RV-8 has 50% more HP than my RV-4 and "U2" wings (3 ft more wingspan than stock)  4000 fpm should be easy.  
 
I  noticed recently that Bruce Bohannon followed "my" formula and extended the wings of the Exxon Tiger (modified RV-4) by 3 feet in his effort to set higher time to climb and altitude records. 
 
Tracy   (waiting for "Ultra Monster Prop" [80  x 110 ]  to arrive )
Tracy, are you joking or serious?  This seems just possible enough that you MIGHT be serious.  

Ken Powell
Bryant, Arkansas
501-847-4721
 
-------------- Original message --------------
Uh oh, good thing Ed helped me get that 20B powered RV-8 project moving.
 
Tracy (shooting for 4000 fpm)
----- Original Message -----
Sent: Friday, January 21, 2005 1:49 PM
Subject: [FlyRotary] monster prop shrinking a bit

Greetings,
 
 
I talked to Clark at Performance Props today.  I’m going to go ahead and send my prop in for final finishing, since the engine is down anyway.  I reported that I’m currently getting 6000 rpm at 100 mph in climb, and 6800 rpm at WOT 8000 ft.  I requested 6500 rpm in climb, which will make top RPM about 7300 WOT at 8000.  He’s got to run the number, but the rough estimate is that the prop will change from it’s current 74”x88” form, to about 72”x82”.   He seemed very excited about what this will do for my performance, in both climb and cruise. 
 
I told him I need a guarantee that it will beat Tracy :-)   Seriously, I told him that I was getting 2400-2500 fpm climb now, and wanted 3000 fpm. He seemed pretty sure this change can get me there :-) 
 
Cheers,
Rusty (Tracy's going down)
 
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