Saturday, November 07, 2009

Quest MLAS - stability

My MLAS, prior to paint, comes in at 3oz. I measured the actual CG and set the overrides. I haven't tried to apply a 'phantom' cone to account for base drag. With a B6, the margin drops to 0.32. With a C6, it drops to 0.26. It's almost hard to believe that CG shift of a mere 0.2 inches will result in instability, but I guess there is always a tipping point. Time will tell if it is stable at all. But, I'm going to trust the manufacturer for the initial B6 flight. According to the sim, a B6-4 is about right and even with the sim being optimistic, a -4 is probably as good as a -2.