Jim Wilson wrote: > Here is my local config for the p51d yasim propeller. Most of these > values are pretty much on target according to actual specifications. > The problem is that it "appears" to not produce sufficient thrust.
I did actually get started on this at one point. :) The first problem I ran into is that getting a manual pitch propeller tuned is REALLY hard. Because of the way the numbers work (pitch in YASim isn't an angle, it's a multiplier) it is very easy to move the propeller into a pitch range where the efficiency drops near zero. What I ultimately did was set the prop to have a standard variable pitch governor and hack a printf() into the YASim loop to tell me what settings the prop was actually using. Then, a few days later, my copy of the F-51D Mustang POH arrived. It turns out that this model (which I assume was identical to the wartime P-51D -- they were surplus items, not new construction) in fact had a standard RPM governor for its prop speed lever -- not a manual pitch system at all. What is the source for defining the Mustang's prop control as manual-pitch? If it's not needed, I can all but guarantee that solver tuning will be much easier without it. Andy _______________________________________________ Flightgear-devel mailing list [email protected] http://mail.flightgear.org/mailman/listinfo/flightgear-devel 2f585eeea02e2c79d7b1d8c4963bae2d
