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08-02-2006, 08:50 PM
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Join Date: Aug 2005
Location: Mendon South Carolina
Posts: 1,391
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Pressure recovery Wheel Pants
Catchy name but I am confused as to what it means and the physics behind it.
Can someone explain (in small words) exaxctly what pressure recovery means relative to wheel pants.
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Milt Concannon
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08-03-2006, 08:36 AM
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Join Date: May 2005
Location: Rochester Hills, MI
Posts: 878
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pressure recovery
Fundamentally, it means the shape is designed to minimize flow separation on the downstream side of the fairing. Minimum form drag occurs if laminar (non-separated) flow can be maintained along the entire surface of any body moving though the air.
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Dennis Glaeser CFII
Rochester Hills, MI
RV-7A - Eggenfellner H6, GRT Sport ES, EIS4000, 300XL, SL30, TT Gemini, PMA6000, AK950L, GT320,
uAvionixEcho ADSB in/out with GRT Safe Fly GPS
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08-03-2006, 08:54 AM
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Join Date: Jan 2005
Location: Indianapolis, IN (KUMP)
Posts: 1,019
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What happened to the small words 
T.
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Thomas Short
KUMP - Indianapolis, IN / KAEJ - Buena Vista, CO
RV-10 N410TS bought / flying
RV-8 wings / fuse in progress ... still
1948 Cessna 170 N3949V
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08-03-2006, 09:36 AM
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VAF Moderator / Line Boy
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Join Date: Jan 2005
Location: Dayton, NV
Posts: 12,247
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Quote:
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Originally Posted by TShort
What happened to the small words
T. |
It is shaped so that the air sticks to it better! 
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Paul F. Dye
Editor at Large - KITPLANES Magazine
RV-8 - N188PD - "Valkyrie"
RV-6 (By Marriage) - N164MS - "Mikey"
RV-3B - N13PL - "Tsamsiyu"
A&P, EAA Tech Counselor/Flight Advisor
Dayton Valley Airpark (A34)
http://Ironflight.com
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08-03-2006, 09:39 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,408
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less drag.
Mike
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08-03-2006, 10:55 AM
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Join Date: Jan 2005
Location: Indianapolis, IN (KUMP)
Posts: 1,019
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LOL - That was sorta tongue in cheek but thanks for the replies - makes more sense now to this non-engineer !!
My understanding is that these are smaller and tighter fitting - any issues with grass or unimproved strips?
T.
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Thomas Short
KUMP - Indianapolis, IN / KAEJ - Buena Vista, CO
RV-10 N410TS bought / flying
RV-8 wings / fuse in progress ... still
1948 Cessna 170 N3949V
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08-03-2006, 11:20 AM
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Join Date: Aug 2005
Posts: 845
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Quote:
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Originally Posted by TShort
LOL - That was sorta tongue in cheek but thanks for the replies - makes more sense now to this non-engineer !!
My understanding is that these are smaller and tighter fitting - any issues with grass or unimproved strips?
T. |
I just replaced my old-style RV-6 pants with the newer PR pants, and the new ones are most assuredly not smaller! I was actually surprised at the improved performance because the new ones look so much larger than the old ones.
There's a side-by-side comparison here:
http://n466pg.blogspot.com/2006/06/t...-my-pants.html
Tight fit is up to you. I trimmed mine such that I don't have to worry about tire rubbing if the tire pressure is a little low. I have heard, though, that the newer ones can collect grass and stuff back behind the wheel. I haven't had that happen, but I haven't been flying with the new ones very often yet.
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Dave Gamble
Grove City, OH
RV-6 N466PG Purchased already flying - SOLD!
The Book: The PapaGolf Chronicles
Built RV-12
http://www.schmetterlingaviation.com
The Book: Being written.
The above web blogs and any links provided thereto are not instructional or advisory in nature. They merely seek to share my experiences in building and flying Van's RV airplanes.
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08-03-2006, 11:45 AM
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Join Date: Mar 2005
Location: Issaquah, WA
Posts: 146
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Quote:
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Originally Posted by Dgamble
I just replaced my old-style RV-6 pants with the newer PR pants, and the new ones are most assuredly not smaller! I was actually surprised at the improved performance because the new ones look so much larger than the old ones.
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There is actually a noticeable difference in performance between the two styles? |
08-03-2006, 12:45 PM
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Join Date: Aug 2005
Posts: 845
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Quote:
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Originally Posted by skelrad
There is actually a noticeable difference in performance between the two styles?
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They say there is, but my only real measurement I have is between no pants and PR pants. The old pants got a little, uh, worn during my TW transition, so I've left them on the work bench for quite awhile. The difference between no pants and PR pants has been unscientifically measured as 9 knots on a 150hp RV-6.
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Dave Gamble
Grove City, OH
RV-6 N466PG Purchased already flying - SOLD!
The Book: The PapaGolf Chronicles
Built RV-12
http://www.schmetterlingaviation.com
The Book: Being written.
The above web blogs and any links provided thereto are not instructional or advisory in nature. They merely seek to share my experiences in building and flying Van's RV airplanes.
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08-04-2006, 03:01 AM
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Join Date: Jun 2006
Location: San Francisco, CA
Posts: 219
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History of these things
I'm trying to remember... did the PR wheelpants start out as some team rocket option and then Van's picked them up?
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RV7A (aborted in 2007  )
Brooklyn, NY
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