Dan Heath wrote: >>I think, and I know someone will correct me if I am wrong about this, that the RAF48 has a lower stall speed than does the "new wing".<<
The one thing that was held constant when the new wing was developed was the lift coefficient (and therefore stall speed), so if the aircraft weighs the same, stall speed should be the same. The only downside to the "new wing" is that the aileron forces go up due to the cusp on the bottom of the trailing 25% of the chord. The resulting upward forces on the ailerons tighten up the linkages and cables, resulting in higher stick forces to turn at higher speeds. But as somebody put it to me...."Is that a bad thing?". Maybe not, but it allows folks to claim a "lack of harmony" in aileron/elevator forces, not that there was any with the original RAF 48 airfoil, just more pronounced. "Fixing" the cusp leads to a lower lift coefficient, so don't do it... Mark Langford ML at N56ML.com website at http://www.N56ML.com --------------------------------------------------------
