summerwind

there was a post a while back that had a program to which one could enter different props and rpm to calculate airspeed..................can't find it.
please post if you have something.

Rocketman612

My Feedback: (85)

Go to the following link.

http://ajmas.dyndns.org/?loc=projects/thrusthp


Pete

378

My Feedback: (4)

http://personal.osi.hu/fuzesisz/strc_eng/index.htm

summerwind

thx guys...........it did exactly what i needed.

ThumbSkull

My Feedback: (57)

Just watch the thrust calculation. It's way over-optimistic.

summerwind

i saw that...........
the speed estimate is what helps me.
sometimes a smaller diameter(1" in this case) with same pitch at 2,000rpm more gives better speed than the bigger prop at slower speed.
the calc's help to show what rpm difference is in play..............of course the real deal is in the real test itself, but it does give one a starting point.