ianxbrown
Joined: 16 May 2009
Posts: 80
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 Posted: Tue Nov 03, 2009 8:04 am Post subject: Engine mount washer thickness calculation |
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You'll have to do some measuring to figure out the width of the washers, but my schoolboy trig would have it that the thickness of the washers would be given by:
Thickness required = 3/8" * Distance from top mounting bolts to bottom mounting bolts/Distance from top mounting bolts to base of spinner.
This is based on the sine law. The triangle having the angle that includes the 3/8" measurement and the triangle that includes the required washer calculation would both have the same angle (sine). Opposite over hypotenuse in both cases becomes the same value.
So, measure the distance from the firewall to the spinner and from the top to the bottom mounting bolts and divide the smaller number by the bigger one and use it to multiply by the height required (3/8", .375" or .9525 millimeters).
Good luck,
Ian Brown, RV-9A Bromont, Quebec
| Quote: | | Quote: |
Time: 03:28:23 AM PST US
From: "charlie heathco" <cheathco(at)cox.net (cheathco(at)cox.net)>
Subject: engine mount washers
Thanks for the info re washers, now who is the math whiz that knows how
thick the washer should be to raise the front 3/8"? I heard mention of
cutting a slot to enable sliping behind mount, anyone done this?
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