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CRJ Issues

Posted: Thu Jan 17, 2013 1:08 pm
by JustinWheat
I bought the crj 200 from x aviation. Since day 1 I can't figure this thing out. When engaging the autopilot at cruise I get bad pitch oscillations. Along with this are loss of power in both engines. I have the aircraft in crz power in the thrust ref page when this happens. Any help with these known issues would be greatly appreciated. Great aircraft by the way.

Re: CRJ Issues

Posted: Thu Jan 17, 2013 1:40 pm
by Keith Smith
What's your indicated airspeed when you get into the oscillations? The power setting isn't the driving factor. What matters is your airspeed.

If it's within about 10-15kts of VNE, the a/p will command a pitch up to try to slow down to avoid the plane falling apart (since it can't control the throttle) :)

Then, once the speed backs off, it tries to descend to the selected altitude, and the cycle continues :)

Re: CRJ Issues

Posted: Thu Jan 17, 2013 1:57 pm
by JustinWheat
So if I'm understanding this correctly I need to back off the throttle a bit huh? I get a more definite answer but I think IAS was in lower threes when this occurred.

Re: CRJ Issues

Posted: Thu Jan 17, 2013 2:45 pm
by Keith Smith
Yes, I usually settle on around 88.5% N1 in cruise at FL240'ish. Much above that and you're going to run into speed issues.