Inyourvest
8th May 2011, 19:31
Hi Guys,
Does anyone know how to calculate the OGE graph mathematically for the Robinson R22 and R44 helicopters?
Cheers
puntosaurus
8th May 2011, 20:45
Well they're pretty much straight lines, so the tool you need is linear interpolation (http://en.wikipedia.org/wiki/Linear_interpolation). You'll need to choose a temperature line first, and then calculate how far you are along the weight line. Apply the same percentage to the range of pressure altitude and voila ! At higher weights and temperatures there are some kinks in the graphs so you're going to have to put some checks in for that.
Hope that helps.