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craig(at)craigandjean.com
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 Posted: Sat Jan 23, 2010 6:32 pm Post subject: Bolts for Rotax motor mount to firewall |
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I have the old bed-style motor mount. I'm surprised that the lower four corners (as opposed to the top center brace) fasten to the firewall with mere AN3 bolts. I thought it was a mistake in my fourth-hand kit but that is what the plans show too. What size bolts hold the newer ring-style mount to the firewall? Can anyone see any downside to stepping up to AN4?
-- Craig
[quote][b]
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dougsnash
Joined: 14 Apr 2008
Posts: 281
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| Posted: Sun Jan 24, 2010 7:12 am Post subject: Bolts for Rotax motor mount to firewall |
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The only downside to up-sizing your mount bolts that I can see is maintaining edge distance. If that is possible then you can do it I suppose.
A bigger question would be, have you heard of any problems with using -3 bolts in this application? If it ain't broke, etc, etc. There are eight bolts after all.
Do Not Archive
Doug MacDonald
CH-701 Scratch Builder
NW Ontario, Canada
--- On Sat, 1/23/10, Craig Payne <craig(at)craigandjean.com> wrote:
| Quote: | From: Craig Payne <craig(at)craigandjean.com>
Subject: Bolts for Rotax motor mount to firewall
To: zenith701801-list(at)matronics.com
Received: Saturday, January 23, 2010, 8:30 PM
I have the old
bed-style motor mount. I'm surprised that the lower
four corners (as opposed to
the top center brace) fasten to the firewall with mere AN3
bolts. I thought it
was a mistake in my fourth-hand kit but that is what the
plans show too. What
size bolts hold the newer ring-style mount to the firewall?
Can anyone see any
downside to stepping up to AN4?
--
Craig
|
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ggower_99(at)yahoo.com
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| Posted: Sun Jan 24, 2010 1:33 pm Post subject: Bolts for Rotax motor mount to firewall |
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Hello Craig,
Only add lightness and simplicity to your airctaft...
Start thinking that way and when finished you had added so much weight that will perform like an Armor Truck in a NASCAR race...
Saludos
Gary Gower
Flying from Chapala
701 912S 302 hrs of fun flying with same bed mount and AN-3 bolts...
--- On Sat, 1/23/10, Craig Payne <craig(at)craigandjean.com> wrote:
| Quote: |
From: Craig Payne <craig(at)craigandjean.com>
Subject: Bolts for Rotax motor mount to firewall
To: zenith701801-list(at)matronics.com
Date: Saturday, January 23, 2010, 9:30 PM
I have the old bed-style motor mount. I'm surprised that the lower four corners (as opposed to the top center brace) fasten to the firewall with mere AN3 bolts. I thought it was a mistake in my fourth-hand kit but that is what the plans show too. What size bolts hold the newer ring-style mount to the firewall? Can anyone see any downside to stepping up to AN4?
-- Craig
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