> >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

 Alfonso Lebron-Berges wrote:

Glup!!! Sorry. I had a tractor in my thoughts.

Thanks for the correction.

Alfonso Lebron-Berges

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