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Charlie, I simply placed 1/8" thick strips of rubber (you know the red stuff) between the heat exchangers and mounts just so I wouldn't have metal to metal and its worked for over 12 years. Don't think I would do it with a 4 banger due to the vibration levels, but with the rotary I've had no problem.
Ed
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From: "Charlie England" <ceengland7@gmail.com>
Sent: Sunday, May 26, 2013 1:13 PM
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] oil cooler mount question
I've started design/fabrication/redesign of my oil cooler
mount/diffuser. Just as I had a 'final' answer on the mount & was
contemplating the diffuser, it occurred to me that I didn't have any
shock mount provisions for the heat exchanger. For those who have been
flying for a while, have any of you hard mounted the cooler to its
support structure? As the photo shows, the primary mount is direct to
the reduction drive plate. I would simply add the shock mounts, but if I
use this particular cooler (a CX Racing 30 row unit like the one on
Tracy's 20B), I won't have any room. I do have the option of buying a 25
row or using the 19 row I already have on hand, but I'd rather have a
bit too much capacity & throttle the exit air than start with too little
& have to rebuild everything.
Thanks,
Charlie
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