Re: COZY: engine leveling
All rotary mounts were built with 0* thrust, those few that have flown them have not had any issues. We asked. All of these mounts made prior to us making them were also made that way. Nobody on the RX lists had remarked about thrust issues either.
The Lycoming dynafocal rubber, especially the genuine Lord rubbers sag as they age, most likely at least the 1.5*. The half priced VIP dynafocal rubbers last longer but not as smooth as the Lord ones.
Whether under the thrust load of the engine in flight they come up hard against the mount and regain whatever sag we do not know. Probably under WOT during climb.
From: Hicks, Wayne
To: Steve Parkins ; cozygirrrl
Cc: gnorm76 ; cozy_builders ; canard-aviators
Sent: Mon, Mar 10, 2014 1:33 pm
Subject: RE: COZY: engine leveling
No, I don’t think this is correct. See earlier email chain today. We have an up thrust angle on purpose.
When I was building the engine mount there was a chapter that read, how to install your engine.
I was able to extrapolate from the side view of the M,s that the engine is square to the fire wall.
The 1.5 is for older people that are starting to sag.
On Mar 10, 2014, at 11:34 AM, cozygirrrl@... wrote: