winsth Posted December 5, 2005 Report Posted December 5, 2005 Hi, I'm currently programming a "standalone" addon for FS9. This time it's a SAAB340. The SAAB does not have an autothrottle so I need to find a way to make the autopilot pitch for airspeed in IAS-mode. Does anyone have any leads for me? :) I guess one alternative is to control the elevator trim from the addon, but I'm not that good at physics. I can't figure out the correct formulas to maintain a selected IAS and at the same time prevent a phugoid. I guess I have to take things like trim position, angular acceleration, vertical acceleration, delta-IAS etc. into consideration? Please help! This is one of the last things to complete on my SAAB... Fly safe!!
winsth Posted December 6, 2005 Author Report Posted December 6, 2005 ...cont'd... Of course I'm also interested in comments/questions on this topic - not only a solution. Am I the only one finding the lack of "IAS by pitch" in MSFS annoying - or am I not looking hard enough? There are a lot of aircraft "out there" (IRL) with the IAS-mode connected to the elevator - not to the throttles. I can't belive I'm the only one interested in this mode so grab your pen... ehrr.. keyboard.. and share with this forum/topic what you know. :) Have a great day! And Peter... I truly admire your work!
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