Thread: Discussion Herr AT-6 Build thread
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Old Aug 24, 2009, 06:53 PM
rafe_b is offline
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Jay: the plans show the CG at the back edge of the main wing spar. I set it up a just a bit nose-heavy. That 3S/1800 could have been maybe a bit smaller and lighter (or moved back a fraction of an inch.)

I didn't mean to say the plane absolutely needs 100-150 watts. But that's about where mine would be, going by the old "100 watts per pound" rule. As they say, "whatever." The motor I used on the AT-6 is one that's been tried-and-true at 2S power on 13 oz. model, and the power rating suggests about 120-130 watts max. I wanted at least a 1:1 thrust-to-weight ratio, and I made sure it could deliver that before the maiden flight.

My AT-6 is 18.5 oz with a 5.1 ounce battery, so 13.4 oz w/o battery. Allowing 3 oz for your 2S/1200, your plane's weight is 14 oz. w/o battery.

In any case, when I fly it again, it will be at the club field (not the park) while nobody else is around. It's too damn fast for the park, and odds of crashing are too high.
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Last edited by rafe_b; Aug 24, 2009 at 07:01 PM.
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