On Fri, Jun 17, 2011 at 12:17 AM, xsaint <xsa...@gmail.com> wrote: > Hello Folks... > > Was wondering if any nice souls will assist clear this doubt on mine... > > In YASIM, what does "actionpt" really refers to? > Is it the point the engines pull the air through? which the point will > be ahead of the engines or > is it the point at back the end of the engine where the exhaust takes place? > > OR > > Do we have different application for "actionpt" based on the aircraft we > are modeling. For example, > if it is a passenger jet, the actionpt is ahead of the engines and if > it is a military jet, then the actionpt is behind the nozzle? > > Thank you all for the clarifications > cheers
I've always understood actionpt to be the location where thrust should be applied with respect to the airframe. For a propeller-driven engine, I use the approximate location of the main thrust bearing. For a jet, I reckon it depends on the type of jet and the degree of bypass. An older jet engine develops its thrust from the exhaust chamber region. Modern engines with high bypass ratios develop more of their thrust from the fan, so the action point would likely move forward closer to where the main thrust bearings of the fan are located within the engine. I'm not an engine expert by any means, but these are the assumptions I've used. -Gary aka Buckaroo ------------------------------------------------------------------------------ EditLive Enterprise is the world's most technically advanced content authoring tool. Experience the power of Track Changes, Inline Image Editing and ensure content is compliant with Accessibility Checking. http://p.sf.net/sfu/ephox-dev2dev _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
