Balsa USA J3 Cub CG
#1
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Join Date: Feb 2002
Location: Houston, TX
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Balsa USA J3 Cub CG
Just finished my 1/4 scale Balsa USA J3. I have completed it's maiden flight and so far all is good. I think the recommended CG location is a bit forward. My reasoning is that elevator authority weakens on landing. It just wants to come down on the mains without much of a flair.
Any thoughts? I figure I can move the CG back 1/4" without hazard.
Thanks in advance for your input.
Bedford
Any thoughts? I figure I can move the CG back 1/4" without hazard.
Thanks in advance for your input.
Bedford
#2
My Feedback: (19)
Most kit built CUBs show a CG range that is way too far forward for my preferences. I usually start with a CG no further forward than 30% of MAC and work it back from there. You can get back to the 35%+ range before you even start to notice any instability and then all you might notice is the elevator getting more sensitive. A CUB should require only a tiny bit of elevator for flair on landing. If your CUB requires a lot of elevator, it is probably way nose heavy.