John Slade wrote:

(Snip)  Add in the redrive at  35 lb, the mount plate at 5 and
about 5 lb of water
 and we come to about 260 lb for the 13B compared with the Lcy at 310.  Of
 course there will be other items like prop extension, oil and mount, but
 these will be about the same on both. So, if we have a difference of around
 50 lb, does this mean I should mount the 13B aft of the plans point for the
 Lyc to keep the airplane C of G in the same place? If the recommended engine
 C of G is x inches from the aircraft C of G how far aft should the 13B go

 back to compensate for 50 lb?

Alfonso Lebron-Berges wrote:

Maybe I didn't understand the above but it seems to me that if the
13B weight is less, then it should be moved forward instead of aft of
the plans point for the Lyc. Can anybody correct me if I am wrong?

Alfonso Lebron-Berges

John is building a pusher Al.

Paul Lamar
 
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