Re: Prop Efficiency

From: John Kagan <john_kagan_at_hotmail.com>
Date: Tue, 29 Aug 2006 21:59:01 -0000

--- In Indoor_Construction_at_yahoogroups.com, "markdrela" <drela@...>
wrote:
> Your blade angles look way too small. The tip angle implies P/D =
> 1.00

I think this prop probably spends very little time at its lowest
pitch. But it's good to see that the Cl etc. work out well for how it
probably actually flies :)

# V(m/s) rpm Dbeta T(N) Q(N-m) Pshaft(W) Volts
        Amps effmot effprop adv
# 0.67 50.17 0 3.92E-03 7.06E-04 3.71E-03
        0.362 0.7908 0.013 0.7071 0.50205

Which parameter did you adjust to match up with the indoor prop
airfoils?
Received on Tue Aug 29 2006 - 15:02:47 CEST