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  #11  
Old 11-06-2009, 08:09 PM
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jetjok jetjok is offline
 
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Location: Sutter Creek, CA
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Default Hmmm!

Quote:
Originally Posted by Mel View Post
Anyone remember the "close-able" wheel pants that Jim Bede designed many years ago? They had doors on each side that slid down to completely enclose the tires after take-off. Of course, you had to remember to open them for landing or be prepared for more fiberglass work.
Mel! I like it...alot! It seems that one could design a simple "clamshell" type door that would open far enough to allow plenty of clearance during takeoff and landing, but would completely enclose the tire once airborne.
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  #12  
Old 11-07-2009, 09:43 AM
jrs14855 jrs14855 is offline
 
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Location: Lake Havasu City AZ
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Default Lopresti

Google Lopresti wheel pants and look at the avweb article. A bit pricey at $1995 projected price.
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  #13  
Old 11-07-2009, 11:58 AM
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dpansier dpansier is offline
 
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Location: Green Bay, WI (GRB)
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Default Bede wheel pants

This expired patent will explain the inner workings of the clam shell type wheel pant.
Bede mentions a 10% speed increase with his design, the way I read this is 10% over a aircraft equipped with no wheel pants.

https://patents.google.com/patent/US.../en?oq=3750986
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Last edited by dpansier : 07-27-2020 at 08:16 PM. Reason: Updated link
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  #14  
Old 11-08-2009, 11:44 AM
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RONSIM RONSIM is offline
 
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Location: Largo, FL
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Default Brakes get way too hot already

I am thinking about opening up or ventilating the main gear fairings --- my brakes get way too hot with the very gentle use and don't cool very well between TO/LDG.
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  #15  
Old 11-08-2009, 12:29 PM
Lupin Lupin is offline
 
Join Date: Oct 2008
Location: Montreal
Posts: 12
Default

Quote:
Originally Posted by 10builder View Post
Years ago an A&P friend of mine suggested I look for bristle brush material attached to a long flexible strip that could be formed around the inside opening of the fairing. His thought was that if trimmed to just "brush" the tire it would prevent air from burbing inside the fairing and potentially reduce drag.

Allot of airliners use this. The Boeing 737 and Bombardier CRJ, both use strips of bristle material to seal the wheel well when the gear is retracted. I don't see why it couldn't be used on wheel pants if you can fit them in there....
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  #16  
Old 09-06-2018, 06:00 PM
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flyboykelly flyboykelly is offline
 
Join Date: Jun 2006
Location: Port Orange, FL (7FL6)
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Default

Quote:
Originally Posted by jrs14855 View Post
Google Lopresti wheel pants and look at the avweb article. A bit pricey at $1995 projected price.
I?m curious, does any one know why these never made it to market? Was there a flaw in the design, or were the proposed speed gains just not there?
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  #17  
Old 09-06-2018, 06:52 PM
cguarino cguarino is offline
 
Join Date: May 2005
Posts: 377
Default link doesn't work

Quote:
Originally Posted by dpansier View Post
This expired patent will explain the inner workings of the clam shell type wheel pant.
Bede mentions a 10% speed increase with his design, the way I read this is 10% over a aircraft equipped with no wheel pants.

http://www.google.com/patents/about?...BAJ&dq=3750986
I can't get this link to work.
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  #18  
Old 09-06-2018, 07:12 PM
Kyle Boatright Kyle Boatright is offline
 
Join Date: Aug 2005
Location: Atlanta, GA
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Default

Quote:
Originally Posted by cguarino View Post
I can't get this link to work.
That link is from an 8 year old post.
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  #19  
Old 07-26-2020, 08:23 PM
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dpansier dpansier is offline
 
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Default

Try this

https://patents.google.com/patent/US.../en?oq=3750986
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  #20  
Old 07-26-2020, 10:00 PM
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gmcjetpilot gmcjetpilot is offline
 
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Default

How much gap are we talking. In the day before the two piece pants you had large gaps. Baffle material was common. Once we got the two piece you could make it tight. The down side is different tire profiles have broader tread shoulders or shapes and even diameters and widths.

Is it worth it? Yes if you want more speed. Is this one change going to make a measurable difference? No but every little change adds up to measurable gains, even if small. If you have less than an inch all around I'd leave it alone.

As far as air, yes brakes can get hot but only for multi touch and goes.
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