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Old 03-26-2021, 11:01 AM
yarddart yarddart is offline
Join Date: Jun 2006
Posts: 170
Default Rv3b

25psi no problems 30psi shimmy tires balanced wood stifners 3.8 size tire
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Old 03-26-2021, 11:04 AM
Dan Langhout's Avatar
Dan Langhout Dan Langhout is offline
Join Date: Mar 2008
Location: Huntsville, AL USA
Posts: 577
Default 37 . . . .

. . . . is what I run in my -7. I can still get some shimmy occasionally, but it's not bad. Much higher psi and it can rattle your teeth. YMMV.
My goal was to find the highest pressure that would still yield acceptable shimmy results. 37 seems to be it. Had the result been much lower than that, I would probably investigate the wooden leg dampers, etc.
Dan Langhout
2021 =VAF= Dues PAID . . . . .
RV-7 N528DP slow build
First Flight July 26th, 2014
762 hours and counting . . . .
Now based at Moontown (3M5)
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Old 03-26-2021, 11:27 AM
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DanH DanH is online now
Join Date: Oct 2005
Location: 08A
Posts: 9,948

Originally Posted by Sam Buchanan View Post
I guess RVers who aren't running at least 45 in their tires just aren't living in the real world.....
Sam, you are the good pilot based at the very fine airport. That's mighty real in my book.

Then there's the big dummies like me, trying be a hero and do a STOL arrival on this displaced threshold, steeper than normal to miss what I think was a bank building (remarkably close to the runway by Alabama standards), all at about 50 over gross, because we were going to a family wedding, and Ms. Patti doesn't travel light even under normal circumstances...

Get a little slow and it just doesn't flare like a fella might expect
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Dan Horton
Barrett IO-390
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Old 03-26-2021, 11:27 AM
swjohnsey swjohnsey is offline
Join Date: Nov 2018
Location: Kingsville, TX
Posts: 288

Originally Posted by Walt View Post
That's a LDG/TO every 6 minutes, do you ever leave the pattern?
You obviously believe in being very frugal, std. practice is to install new tubes with new tires.
You've been pretty lucky IMO, maybe you should buy a lottery ticket.

Maybe a higher quality tire would help, of course if you're trying to use every available ounce of rubber before changing tires that could be a problem as most RV's don't wear tires evenly.
I can actually do a stop and go every 5 minutes. I am frugal, don't know about very frugal. I have been using the Monster retreads. I've even been known to patch tubes. I've been given a couple of lottery tickets over the years but have never bought one.
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Old 03-26-2021, 06:54 PM
BillL BillL is offline
Join Date: Sep 2007
Location: Central IL
Posts: 5,891

Originally Posted by Walt View Post
35psi is my lower limit, if you start at 45 it will likely be at 35 after 3-4 months (depends on what brand tube you use to some degree).
Just a data point, but I did find DanH and Walt's advice helpful, it has not changed in years.

Not that "I" need to reinforce Walts comment, but I will. I use 45-47 on my 7 and it will hold a little longer that 3-4 months before reaching 35 (Air-Stop). The next set may not.

No one asked but -my tires don't wear in the middle, but on one side. Turning them around seems like more trouble that it's worth. (I am lazy)

Lord Kelvin:
I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.

Last edited by BillL : 03-27-2021 at 06:07 AM.
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