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04-10-2015, 07:28 AM
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Join Date: Jun 2006
Location: Ottawa, Ontario, Canada
Posts: 2,116
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Main tire radius
I'm going to construct some big wooden blocks for stability to rest the main gear axles on when I remove the wheels for bearing maintenance. I'm not at the hangar to take measurements, and I want to put the blocks together before I go out.
Can someone tell me the nominal distance of the main gear axles from the floor when the plane is sitting on normally inflated tires (RV-9A)? I need to know how high to make these blocks so they will just slide under the axles when I jack the plane up so the tires just clear the ground.
Thanks!
Phil
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Phil
RV9A (SB)
Flying since July 2010!
Ottawa, Canada
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04-10-2015, 07:43 AM
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Join Date: Oct 2005
Location: 08A
Posts: 9,477
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Michelin tire databook lists a 5:00-5 at a max inflated diameter of 14.2".
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Dan Horton
RV-8 SS
Barrett IO-390
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04-10-2015, 07:46 AM
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Join Date: Jun 2006
Location: Ottawa, Ontario, Canada
Posts: 2,116
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Quote:
Originally Posted by DanH
Michelin tire databook lists a 5:00-5 at a max inflated diameter of 14.2".
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Thanks Dan. So by that, the bottom of the axle would then be roughly 7 inches off the ground (half the tire diameter) - does that sound right?
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Phil
RV9A (SB)
Flying since July 2010!
Ottawa, Canada
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04-10-2015, 10:09 AM
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Join Date: Jan 2007
Location: Stuart, FL /Hartford, CT/Virgin Gorda,BVI
Posts: 3,122
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get some 2x4's cut 5 inches long. you will need about 4 or 5 of them to do the job. i just did a set of new tires yesterday 
the same blocks work well for the nose wheel removal too.
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Ed D'Arcy
RV6-A 5,200+ hrs, R-44 1,600 hrs, Helicycle 320 hrs, gyro sold,35,000 miles flown in 2015 
Stuart, Fl / S WINDSOR,Ct / Virgin Gorda, BVI - under major repair from hurricane damage
VAF #840 EAA AOPA FAC FABA QB SPA
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04-10-2015, 10:14 AM
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Join Date: Mar 2007
Location: Sonoma County
Posts: 3,821
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Then subtract 1/2 the axle diameter.
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VAF #897 Warren Moretti
2019 =VAF= Dues PAID
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04-10-2015, 11:21 AM
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Join Date: Jan 2005
Posts: 3,642
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I simply use a piece of 6x6 pressure treated lumber left over from the pole barn (hangar) construction. I don't think any specific height is needed.
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Steve M.
Ellensburg WA
RV-9 Flying, 0-320, Catto
Donation reminder: Jan. 2021
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