Thread: Discussion 3DHS 47" Osiris
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Old Apr 25, 2012, 01:44 PM
Neil Morse is offline
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115 should be a fine place to start. I can't remember where I ended up with mine, I just moved it back until it got to a spot that I liked. CG is very much a matter of personal preference, so you should just experiment until it feels right to you, but as long as you start around the middle of the recommended range you will be fine for the maiden flight. The only other piece of advice I would give you is that this plane on 4S is a real rocket ship, but it doesn't NEED to go that fast to fly well. Don't be afraid to slow it down on your maiden until you get it trimmed out and are comfortable with it. I find that it has no bad habits at any speed.

As far as whether the CG is measured with the plane upright or inverted, I may be missing something but I've never thought that it made any difference. Depending on where they balance vertically, I think some planes are easier to hold on your fingertips inverted than upright, but other than that I don't see what difference it makes.

Neil
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