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Date: Wed, 01 Jun 2005 10:05:31 -0400
From: Ernest Christley <echristley@nc.rr.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: A little clarification...
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Mark R Steitle wrote:

>The motor mount can be a big hurdle, but the Continental bed mount
>turned out to be a blessing in disguise.  ...  Hardest part was to get the engine lined up with the airframe
>while I cut and fitted the pieces.  It helps to know how to weld, or
>know a good welder for this task.  
>
>  
>

I found a really easy way to do this using a laser level and a homemade 
stand.

http://ernest.isa-geek.org/Delta/Pictures/EngineStand.jpg

The stand can be thrown together in a few minutes from some 2x4s and 
assorted scrap wood. The top 'box' should fit the sides of the oil pan 
closely.  Drill 4 holes around the top so that a 5/16 bolt will drop 
in.  Put a nut on the bolt, then a washer and set one in each hole.  The 
bolts should rest just inside the oilpan flange.

Set the airplane up so that the level shines through the horizontal 
centerline.  Now move the stand in front of the airplane, and set the 
engine on it.  Adjust the nuts on the bolts to dial in the height, 
upthrust, and make it level. 

Now move the level to indicate the vertical centerline.  Slide the stand 
left or right, or turn it, to center it and get the correct left or 
right thrust.  Taps from a small hammer at the very bottom of the legs 
will let you move the stand in very small increments.

The second adjustment will most likely disturb the first, so iterate 
through both adjustments until nothing more needs to be done.  Now weld 
the motor mount together in place.


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