Paul, I measured the longerons on the Legacy. They come out to  9.25" below
the top of the cowl or 1.125" below the top hardpoints.  The  drawing shows
the thrust line to be 1.5" below the longeron line, then angles down 1
degree and to the right 2 degrees.

Bill Bradburry

Paul, I was incorrect when I indicated above that the drawing shows  the
thrust line to be 1.5" below the longeron line.  Another  look at the
drawing shows it to be 2.5" instead.

Bill Bradburry

Can you take a direct side shot of the existing motor mount?
Also Jerry could measure the current existing mount when he gets it
and determine the thrust line from those measurements since
he has dwg's on Lycoming dynafocal mounts.


Paul Lamar ...No rotor no motor.

I only have the pics that I sent.  The mount is not here now so I  can not
take more pics.  I will send the mount to Jerry when we are ready  to start
the modification.

Bill Bradburry

OK No problem Bill. Jerry can used these dwg to figure out
exactly where the thrust line is from the old mount

---------------------------------------------------------------
From this overlay the engine looks higher and not lower.
Not to worry Bill we will figure it out exactly when we get the
old mount.

Paul Lamar ...No rotor no motor.

The overlays are very useful.  How did you manage to scale the engine
to the photo?   However you did it, its great.  Jerry

In Rhino you can scale and move background bit maps (jpgs) around.

You draw the engine to scale first. Then you place the background
bit map and scale it to fit some known dimension.

That is a very powerful feature. Once you know a few dimensions
on a photograph you can measure all other dimensions.
The pictures have to be taken dead on perpendicular
however to work the best. Here is another example.
Not quite perpendicular unfortunately.


Paul Lamar ...No rotor no motor.

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