rcFp

Can someone tell me if this machine is accurate.
i using one of these and seems to me that every minor change (the distance of the ruler pointers from LE, the level from which you leave the model) causes quite big CG difference
am I right ?

by the way is every low wing model should be balance upside down

thanks

RCaeroguy

My Feedback: (4)

What type of plane are you trying to balance? Mine works great for high and low wing planes but I have a hard time with a mid-wing plane like a Somethin' Extra.

tailskid

My Feedback: (34)

I've been using one since they came out and think it is very accurate - only 1 sq. In of space touching a wing panel is nice.

Yes, a small shift in its location will demonstrate the nose/tail heavy condition.

Jerry

glowplug

My Feedback: (1)

I don't think it's perfect, but it's a better method than "fingers on the spar". What I've learned with the GP CG machine is to make sure that the wires on the end of the rulers are just touching the leading edge of the wing....not forced against it. That will keep an accurate measurement. And yes, all low wing models should be balanced upside down. As RCAeroguy mentioned, mid wing models can be a bit trickier to balance.

Mike

TigreST

Check this link to the warbird area here on RCU. Some different thoughts on the "C.G. Machine" and other ideas related.

http://www.rcuniverse.com/showthread...627&forumid=34


Tonyy

rcFp

I am trying to balance mid wing plane and as i said slight changes causing different result
i will try a new set of tests with the plane upside down and i will let you all know