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Date: Sun, 12 Sep 2004 17:20:20 -0400
From: Ernest Christley <echristley@nc.rr.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Engine off the floor
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David Staten wrote:
> I am more worried about the stamped sheetmetal pan than anything else, 
> Ed... Maybe I am misunderstanding your intentions, but you are going to 
> weld the ears to the pan? or are you going to just bolt them to the 
> engine in the corners (sandwiching either them, or the pan, against the 
> block)..? I'm sure the bolts would be fine, since we use similar bolts 
> in the more common "sandwich" mounts that are being marketed for the 
> rotary, and if there is a concern, use longer corner pieces that recruit 
> more bolts to the cause. Wouldn't it be possible to use a sandwich plate 
> of your own using the steel plate you are considering, but having it 
> mostly cut out within the dimensions of the block/pan (almost like a 
> gasket shaped plate with the ears on it.. )..
> 
> Dave
> 

My thought was to place the ears under the pan.  Bolts would pass 
through the arms and then the pan.  IN ADDITION, the arms would be 
welded to the pan.  The IN ADDITION part is the core of the confusion I 
think.  I agree with the other comments that the oil pan is not a part 
to be trusted to do the job alone, but the vertical sheet of crappy .050 
steel would help stiffen the arms.  I've been thinking that the arms 
would tend to twist without some extra support.

The other stated concern, removal of the oilpan is a moot point here. 
The supporting beams of the mount will block any attempt to remove the 
pan with the engine on top.  That was what got me thinking in this 
direction. (A leads to B, which gets you to C...)

-- 
http://www.ernest.isa-geek.org/
"Ignorance is mankinds normal state,
   alleviated by information and experience."
                                   Veeduber