Any reference to helicopter aerodynamics (if that isn't an oxymoron) is, in any case, irrlevant. Everone knows that the only reason they stay airborne is because they are so ugly that the earth repels them.....
Ray,
"FL 250, wind 244/70, 300 KDAS, smooth air, GPS pod, instrumented ac, autopilot (height hold) and autothrottle engaged."
"...no temporary loss of speed"
No $hit, Sherlock!