Re: [Flightgear-devel] YASim Prop wash and the p51d
Am Montag, den 22.06.2009, 11:16 -0400 schrieb Jim Wilson: Hi Andy, Looking through the code I don't see anything that considers prop wash. That's still true correct? Assuming it is, I came across an old posting at http://www.mail-archive.com/flightgear-de...@flightgear.org/msg07479.html and while this looks interesting, I'm kind of wondering if there's a way we could just add a prop-wash-diameter value to hstab and use that (with prop pitch, rpm, and IAS) to plug in additional lift into the solver. It is really desireable to have such a feature available. It would make the simulation of powerful Propeller Aircraft much more realistic. Today the high Power Props lack controlability on take off. This was often critizised and led to the deletion of Aircraft from the Base package due to the lack of user friendliness. While discussing the p51d FDM with Jim, we came to notice the lack of the slipstream effecting the control surfaces. This can hardly be faked by any current means as the additional Effectivity vanishes with the Aircraft gaining speed and every feature I can use to simulate this (effectivity, lift, incidence) increases with speed and is therefor useless. Additionally, the effect is of course dependant of the power and propeller pitch setting. Another point missing is the slipstream effect on the rudder. It causes a pronounced tendency to pull against the turning direction of the propeller. It is caused by the spiral slipstream hitting the rudder. Again, this effect vanishes with higher Airspeed. All these isn't noticeable with multi engined Aircraft. They were not designed to utilize the Slipstream. Thanks, Jim Greetings -- Detlef Faber http://www.sol2500.net/flightgear -- ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] YASim Prop wash and the p51d.
Hi Andy, Looking through the code I don't see anything that considers prop wash. That's still true correct? Assuming it is, I came across an old posting at http://www.mail-archive.com/flightgear-de...@flightgear.org/msg07479.htmland while this looks interesting, I'm kind of wondering if there's a way we could just add a prop-wash-diameter value to hstab and use that (with prop pitch, rpm, and IAS) to plug in additional lift into the solver. Thanks, Jim -- Are you an open source citizen? Join us for the Open Source Bridge conference! Portland, OR, June 17-19. Two days of sessions, one day of unconference: $250. Need another reason to go? 24-hour hacker lounge. Register today! http://ad.doubleclick.net/clk;215844324;13503038;v?http://opensourcebridge.org___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] YASim Prop wash and the p51d
Hi Andy, Looking through the code I don't see anything that considers prop wash. That's still true correct? Assuming it is, I came across an old posting at http://www.mail-archive.com/flightgear-de...@flightgear.org/msg07479.html and while this looks interesting, I'm kind of wondering if there's a way we could just add a prop-wash-diameter value to hstab and use that (with prop pitch, rpm, and IAS) to plug in additional lift into the solver. Thanks, Jim -- Are you an open source citizen? Join us for the Open Source Bridge conference! Portland, OR, June 17-19. Two days of sessions, one day of unconference: $250. Need another reason to go? 24-hour hacker lounge. Register today! http://ad.doubleclick.net/clk;215844324;13503038;v?http://opensourcebridge.org ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
