It cant be mounted solid enough to create no relative motion.  The rad
itself will flex trying to keep up with the vibration.  Rads do not like
vibration at all.

----- Original Message -----
From: "Finn Lassen" <finnlassen@netzero.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, December 29, 2003 10:29 PM
Subject: [FlyRotary] Re: aluminum hose bungs/fittings


> Russell Duffy wrote:
>
> > I'm now wondering if I couldn't just put about a dozen 1/8" pop
> > rivets, rather than welding the angle.  I have to admit, that I'm
> > thinking about easy of replacement if one ever gets damaged away from
> > home.  Assuming I keep a spare core with two AN12 fittings welded to
> > it, all I'd have to do to replace a core is drill out the
> > rivets, then drill and pop rivet the new core.
>
> That's the way I did it (but also JB-Weld inbetween the angles and the
> cores - probably not needed). Well, actually I do have two 1/4 threaded
> rods on the outside of the cores connecting the upper and lower angles.
> However, both Tracy and Ed have rubber spacing  - basically clamping the
> cores between their mounts.
> Tracy's comment was that my installation would never make it in a
> Lycoming environment (vibrations).
> I never fully understood that - if cores are solidly mounted to the
> engine there should be no realtive motion...
>
> Finn
>