Calculate helicopter rate of climb

[mstram]

This is for R.C. helis, but I would guess?? it might apply to full scale as well.

Using the Darkhorse calculator :
Dark Horse - Helicopter Power & Setup Advanced Calculator

or Motocalc or webocalc http://flbeagle.rchomepage.com/soft...c_imperial.html

or other R.C. power/thrust calculators yields similar results for static thrust, for a heli.

Is there a ballpark estimate / formula to convert excess thrust to climb rate for a heli, assuming a straight up vertical climb ?

Mike