PB Models Crescent Bullet

It's always better to be slightly nose heavy than tail heavy because that can be corrected later, but a tail-heavy model just ends up in a binbag.

Remember the golden rule, A nose heavy model fly s badly , a tail heavy one fly s once .

Garry

RobC wrote:

alan cantwell wrote: Always inverted, with just the tip of the finger, and a correct cg is very important, It's perhaps the most critical measurement on any aircraft, Bullet CG is 80 mm from leading edge at the root, inverted, slightly nose down, empty tank, or in a lekky version, with the batteries in flying position

That's my point Alan, just the width of your fingertips gives 5mm or more latitude, then there's different peoples interpretation of 'slightly nose down'. Unless the centre of mass lines up with the wing upper surface this can add a few more mm variation into the mix.
Anyway, thanks for checking as that confirms I'm within 5mm now.

You have to have some levity here, anything over 15 lbs tends to make the fingers sore, but use a surface that's too small, and you could damage the structure, The middle of your index finger will do, and slightly nose down is just that, slight, that's easy enough to interpret, surely

It's only powering the radio and servos, he has a proper engine for propulsion.

Ha Ha i think its for the receiver Eric he has a proper engine for power

I've just said that.

how long are your legs Eric? I reckon mine could swing 12" but it would leave furrows in the grass. Even it's big brother, the Tornado, is struggling in long grass with a 12" prop. I think yours must be the bigger ARTF version, the original is only 50" span and 4 1/2lbs. .60 power would be a tad over the top. It certainly wouldn't be tail heavy though