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08-22-2011, 04:32 PM
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Join Date: Feb 2008
Location: Apache Junction, Az
Posts: 53
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Here is my data on power required with and without wheel fairings. Other data for drag is on my web page under flight testing.

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08-22-2011, 04:44 PM
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Join Date: Feb 2008
Location: Apache Junction, Az
Posts: 53
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Here is a comparison of thrust required for level flight with and without wheel fairings. (The previous post was power required for level flight). The wheel fairing reduced minimum drag from 257 lbs to 231 lbs at best glide airspeed.
Without wheel and leg fairings
With wheel and leg fairings

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02-12-2012, 08:54 PM
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Join Date: Jan 2006
Location: New Smyrna Beach, FL
Posts: 1,339
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A year or two ago I remember seeing a post about someone that was making after market main gear wheel pants for the -10. Not sure if it was on this forum or somewhere else. Anybody know the status of that project?
__________________
David Maib
RV-10 N380DM
New Smyrna Beach, FL
VAF Paid 1/21/2020
"In '69 I was 21, and I called the road my own"
Jackson Browne
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02-12-2012, 08:58 PM
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Join Date: Nov 2005
Location: KRTS
Posts: 1,798
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Very cool Mike, what did you use to gather that data?
__________________
Next?, TBD
IAR-823, SOLD
RV-8, SOLD
RV-7, SOLD
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02-14-2012, 04:45 AM
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Join Date: May 2007
Location: Rosharon, TX
Posts: 110
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Quote:
Originally Posted by pierre smith
Did you notice his funky air exit flap? Looks like an adjustable exit which he can close at speed for even less drag.
Notice the tape around all joints in the cowl, gear leg fairings and tail fairing.
He also has the fresh air vents closed and taped....no telling what under-hood mods he has too.
Mine will run 186 Knots down low, WOT with none of the above! The fit and finish and attention to detail by the guys in Big Fork, Montana, who built her, makes a big difference in beating Van's posted numbers for the -10.
Best,
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Sorry I'm so late to the party guys, I just saw this thread.
A little history on this particular -10 and my race speed.
The funky air exits, they are just that. Cowl flaps. Fully functional, open for TO, closed for cruse. Been there since HR 0. No other under cowl mods (at that time.....) Race prep included all seams taped, steps removed, and vents sealed. I also turned the prop up to 2750 for the race. Verdict is still out on if the prop speed helped or not, Bob A has done more research on that one.
The speeds that I've seen Pierre post, I'd venture to say we are almost identical. One day I'd like to go toe to toe and find out.
Real life numbers, 177 knts @ 8500ft @14 GPH.
What I've learned about the 10 in nearly 200 hrs. She does not like to be down low. You "can" go fast low, but you are going to burn a LOT of gas. Go to at least 8000 ft and let her run.
__________________
Nick "Rehab" Nafsinger
91TS Rosharon, TX
RV-4 Bought 2019
RV-10 Built 2010, Sold 2019
RV-8 SB, "Fuse in progress"
Last edited by Nick : 02-14-2012 at 05:22 AM.
Reason: Spelling
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02-14-2012, 05:00 AM
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Join Date: Jan 2005
Location: Louisville, Ga
Posts: 7,840
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Like mine.
Hi Nick,
My numbers pretty well match yours at 7,500 or so. Funny thing...I went 178 K TAS last week, at 75% power but I had a 140 lb. PT-6 gearbox in the back seat, so I had an ideal CG with only me in the front.
FYI, last May I did Top-time-of the day, running 188K TAS at 1200', WOT and burning near 23 GPH! during the Race-to-Ridgeland...a 145 mile 4 waypoint cross-country.
I'll let you in on my discovery...2630 RPM was 3 knots faster than last year's speed. These numbers from my Dynon 100 and the time calculated by individual stop watches at the finish line.
Best of luck,
__________________
Pierre Smith
RV-10, 510 TT
RV6A (Sojourner) 180 HP, Catto 3 Bl (502Hrs), gone...and already missed
Air Tractor AT 502B PT 6-15 Sold
Air Tractor 402 PT-6-20 Sold
EAA Flight Advisor/CFI/Tech Counselor
Louisville, Ga
It's never skill or craftsmanship that completes airplanes, it's the will to do so,
Patrick Kenny, EAA 275132
Dues gladly paid!
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02-14-2012, 09:41 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
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Quote:
Originally Posted by Nick
The funky air exits, they are just that. Cowl flaps. Fully functional, open for TO, closed for cruse.
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Nick, any chance of more details on this, like photos, and how it affects CHT's etc??
Thanks in advance.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011 
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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02-15-2012, 12:25 PM
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Join Date: May 2007
Location: Rosharon, TX
Posts: 110
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Quote:
Originally Posted by Mike S
Nick, any chance of more details on this, like photos, and how it affects CHT's etc??
Thanks in advance.
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Just for you Mike... New thread and everything. 
__________________
Nick "Rehab" Nafsinger
91TS Rosharon, TX
RV-4 Bought 2019
RV-10 Built 2010, Sold 2019
RV-8 SB, "Fuse in progress"
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02-15-2012, 12:34 PM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
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Thanks Nick, it is appreciated.
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011 
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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02-15-2012, 02:55 PM
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Join Date: Feb 2012
Location: Irvine,CA
Posts: 8
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I love that old video.
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