New ultra fly P-51 Mustang CG Question
 

I just finished building ultra fly p-51 mustang, I'm having trouble setting correct cg, manual saying 70mm back from leading edge.
I am measuring from leading edge next to fuselage, I'm using GP CG machine to balance the plane level at 70mm.(balancing plane upside down because of the low wing design)----is that correct

I took it out & could not fly it because when rolling on the ground, if the landing gear hit a small bump or a pebble the plane nose dives
& the prop gets destroyed. is this normal or is my cg all out of wack. i have a picture diagram below to explain better


please help me.

Thank you all.

RE: New ultra fly P-51 Mustang CG Question
 

Hi, I took a chance & tossed the plane in the air. Plane flys like a dream (perfect) with this setup.:D