Mailing List flyrotary@lancaironline.net Message #63546
From: Mark McClure <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Engine Mount design
Date: Mon, 10 Jul 2017 18:01:01 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Neil,

Are these offsets for Glasair or other aircraft?  I was told by Factory Rep that the Glasair had minimal offsets.  So I was not going to build them in. The other issue I see is that degrees are based on the exact same thrust point which I have never been able to get them to give me and I do not have a cowling to generate.

Mark


On Jul 10, 2017, at 5:31 PM, Neil Unger <flyrotary@lancaironline.net> wrote:

Mark,  Do not forget the "offsets" with the engine.  The exact numbers can only be sourced from the factory, but from memory the engine has to face to the right 1.5 degrees and down 1.78 degrees.  Check these figures with the factory.  regards,  Neil.


On 7/11/2017 6:35 AM, Mark McClure wrote:
Well I think I have designed my mount for the Glasair.  Overall I think it will be a bit overkill but I am ok with that.

Should put the CG close to the same spot as for the Lyco.  Thrust point in the same spot.  Green bars were part of the Glasair mount for a Lycoming. (There was also one between the two upper points but I don’t think any of them are truly necessary with the stabilization of the plate.  Yellow bar I am calling optional at this point to make it easier to work with intake/exhaust.  Another idea we had was to weld on a flange for both sides of the yellow bar and have it bolt on during final install.

Thoughts?

Mark



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