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  #1  
Old 12-18-2019, 08:54 PM
2Ways2Fly 2Ways2Fly is offline
 
Join Date: Jul 2019
Location: Tucson Az
Posts: 6
Default Tire pressure

What are you using for tire pressures on the RV-3?
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  #2  
Old 12-19-2019, 06:33 AM
oaklandaviator oaklandaviator is offline
 
Join Date: Dec 2014
Location: Las Vegas, NV
Posts: 160
Default Tire pressure

We run 23 to 25 psi to control any shimmy tendencies. Lower pressures seem to shimmy less at the expense of tire life. Much under 20 and I start worrying about where we'll have the rubber spin on the rim, but we haven't had it happen even at very low pressures of around 15. Harder to push in the hangar below 20 and I'm sure the takeoff roll is longer...
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  #3  
Old 12-19-2019, 02:39 PM
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RWoodard RWoodard is offline
 
Join Date: Jan 2005
Location: Brighton, Colorado
Posts: 504
Default

The original builder of my RV-3 listed 29psi as the desired tire pressure for my 3. I?ve always just used his recommendation. My plane is on the heavy side so maybe that?s why I?m at a bit higher psi.
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Rod Woodard
Brighton, Colorado (CO12)
RV-3 IO-320
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  #4  
Old 12-19-2019, 09:46 PM
2Ways2Fly 2Ways2Fly is offline
 
Join Date: Jul 2019
Location: Tucson Az
Posts: 6
Default

Thanks guys
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  #5  
Old 01-16-2020, 08:15 AM
yarddart yarddart is offline
 
Join Date: Jun 2006
Posts: 206
Default 20psi

Hr1 20psi per jh
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  #6  
Old 01-16-2020, 09:26 AM
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Ironflight Ironflight is offline
VAF Moderator / Line Boy
 
Join Date: Jan 2005
Location: Dayton, NV
Posts: 13,310
Default

Anything over 26 in ours gives us noticeable gear leg shimmy - and that is WITH wooden dampers installed. Airplane handles fine at that pressure, and we’ve run through two sets of tires in 750 hours, so I call wear acceptable.
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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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  #7  
Old 01-22-2020, 10:44 AM
flysrv10 flysrv10 is offline
 
Join Date: Jan 2010
Location: Florida
Posts: 449
Default

Quote:
Originally Posted by 2Ways2Fly View Post
What are you using for tire pressures on the RV-3?
Dresser Tire has a chart for tire pressure. Depends of the size and no of plys. Good place to start.
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  #8  
Old 01-23-2020, 10:06 AM
dnh98221 dnh98221 is offline
 
Join Date: Oct 2018
Location: Anacortes
Posts: 33
Default Under pressure

I used to run ~25 psi in my -3, but now run closer to 50 psi. I've never had shimmy throughout that range. Not only is the plane easier to roll around there's no chance of slipping a tire on the rim. When we do formation ground maneuvers we often spin on one of the mains.

Dan
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RV-3B
PA-18
C180
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  #9  
Old 01-23-2020, 12:51 PM
Chris Cooper Chris Cooper is offline
 
Join Date: Jan 2017
Location: Aberdeen, UK
Posts: 65
Default

At 23psi, no shimmy. At 26 psi and over lots of shimmy on the left leg at the end of the roll. I found this out by letting the tyres gradually deflate. No science!
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Chris Cooper
www.busyaviation.co.uk
RV3A - bought
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  #10  
Old 01-23-2020, 01:30 PM
jrs14855 jrs14855 is offline
 
Join Date: Apr 2008
Location: Lake Havasu City AZ
Posts: 2,943
Default Shimmy

Anyone tried balancing the wheel pants by putting weight in the front of wheel pant??
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