engine mount

[Lance Van Nostrand]

Matt,
My testing has shown that 1/8 ac ply will flex but not break.  The larger fuses today are a bit more demanding of stiffnes in the firewall than the skinny fuses of a few years ago.  Even a 1/8 ac ply firewall should have at least one rib across the back. If made from lite ply it weighs nothing.
--Lance
  ----- Original Message ----- 
  From: Rcmaster199 at aol.com 
  To: discussion at nsrca.org 
  Sent: Saturday, December 11, 2004 9:31 AM
  Subject: Re: engine mount


  In a message dated 12/11/2004 8:14:38 AM Eastern Standard Time, flyboy422 at juno.com writes:
    Hi,

        I'm building an Eclipse and was wondering what can be done to stiffen
    up the light firewall than comes with the kit to support a Hyde A mount
    so it doesn't flex? I'm running a O.S.140

                           John
  1/8" aircraft ply is plenty strong without any stiffeners in the backside of the FW. The beauty of the Hyde and Hyde style mounts is that there's relatively little energy transferred to the backplate. Most of the energy is absorbed bythe rubber snubber. Good luck

  MattK
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