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Old 09-15-2008 | 09:53 AM
  #15  
NM2K
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From: Ringgold, GA
Default RE: Shoestring CG?

ORIGINAL: Upnet

I looked on the GP website..but could not find the .pdf for the manual. Jeez....maybe I need to get the old eyeballs checked. Especially when I get this plane finished....and BEFORE I maiden her.
Wow....putting a .91 on it?? Hmmmmmmmmm........????? Maybe that would be suicidal....wonder if the airframe would hold up?

What do you all think? .61.....or.. .91?

Thanks for the link to the geistware.com

Thanks to all. I just love this site. So many people willing to help. You folks ARE the best!

-


The .91's sold by OS, ST and any other manufacturer that simply bored out a .61, are not as powerful as the true .90's and .91's that came out in their own original crankcases. Not to worry. A contemporary .91 built in a .61 crankcase would give you a tad more in vertical flight and barely anything noticable in level flight. The difference in displacement/power production is not as great as when one designs an engine to be a .91 in the first place.


Ed Cregger
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