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Speed,Combat,Scale,Racing => Combat => Topic started by: Arlan McKee on February 11, 2015, 02:48:53 PM

Title: Bosta cg
Post by: Arlan McKee on February 11, 2015, 02:48:53 PM

Can anyone tell me where to balance a Bosta?

Thanks,
Arlan

Title: Re: Bosta cg
Post by: Howard Rush on February 11, 2015, 03:53:57 PM

My guess would be the front of the 1/4"-square spar.  I asked Neal.  I'll endeavor to report his advice.

Title: Re: Bosta cg
Post by: Howard Rush on February 11, 2015, 05:41:19 PM

He said, "I don't honestly remember, but it is proportionally the same place as a Nemesis II.  One of the issues with the Bosta is that the center ribs are 10 inches, vs 9 on the Nemesis II, which pushes the honkin' motor out 10%.  I used to put a Tigre as close to the leading edge as I could, and recess a Fawx about 1/4 inch into the LE."

Nemesis CG goes at the front of the spar.  Spars are probably the same fraction of chord, so my guess was probably close.

Title: Re: Bosta cg
Post by: Arlan McKee on February 11, 2015, 08:29:24 PM

Thanks, Howard.
That is exactly where it balances
I will have a little more diminutive Fox 15bb providing the honk, so I don't have a nose-heavy issue.
I did, however, build it with a single carbon fiber boom that can slide in or out. It looks really cool from the top
or bottom but I do miss that double airfoil look you get from the side with the balsa and ply booms.

Arlan