On Tue 7 August 2007 22:37, Berndt, Jon S wrote: > > Yes there is some differences needed to keep the right > > heading , when we modify the throttle value, but it is not > > exactly what you are describing. > > I haven't been able to look too closely at this, yet, but I have a > suspicion. If you look in the function FGPropeller::GetPowerRequired() > there is this line at the end of that function: > > vTorque(eX) = -Sense*PowerRequired / (RPS*2.0*M_PI); > > This calculates the torque caused by the propeller as it beats against > the atmosphere, and it does account for the sense that the propeller > turns in. > > Now, look in the function above it, Calculate(), and you will see this, > where the moment is calculated for the propeller: > > vMn = fdmex->GetPropagate()->GetPQR()*vH + vTorque*Sense; > > Do you see what is happening? The torque is getting multiplied by the > sense, again. I suspect that the equation should simply be: > > vMn = fdmex->GetPropagate()->GetPQR()*vH + vTorque; > > Can you try this out? > > Jon
Hello Jon I just tried FG rebuilt with that update, with P-38L when pushing the throttle and pulling.... and pushing ........ the aircraft reaction is better the aircraft heading is now close to be stable. When testing it with F4U-7 (french corsair) i continue to get the "welcome" right torque effect more or less according to the throttle position. I cannot answer instead of Torsten, may be you you have pointed to the right place. That update gives a positive result. Regards -- Gérard ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
