Posted for "Scotty G" <WarbirdAeroPress@cox.net>:

 Marv and Rick,
 
 That was a great worksheet, but after looking at it, I didn't find what I was
looking for. How can I work numbers on a engine with a different weight? I
have a short engine mount.
 
 
 Scotty G
 UnleashedAirRacing.com
 SeptemberPops.com
 WarbirdAeroPress.com

[Without actually weighing the airplane it's difficult to estimate what the changes will be...  your moments will also be slightly different with the change in arm for short mount.  I think you will need to plug in your real measurements and weights in order to do a direct comparison.  W&B in a LNC2 isn't exactly the kind of thing you want to fudge.   I know of at least one LNC2 with a short mount, O320 & fixed pitch prop, and on that airplane, even with a 12lb platter at the base of the spinner there isn't enough weight forward to allow the carrying of a passenger without going aft CG.  Definitely not good.   <Marv>    ]