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#1
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![]() "SouthBayGuy" wrote in message link.net... Hello Everyone: 2. Auto Pilot Problem-Now THIS is the thing that is frustrating. When I'm flying any of the lighter aircraft, really anything other than the airliners, when the A/P is set for altitude it keeps the trim so nose high, the airplane can't pass 80 knots or so. This is especially bad in the 172 182 and Mooney. The twins do it to an extent; it doesn't really happen in the jets because you can set the A/P to maintain IAS. Is there ANY way to stop the A/P from setting the trim so nose high? I've also noticed that when flying along in A/P that periodically the plane will suddenly act like it was hit by a gust (even with wind turned off), slip, raise and fall a bit, then try to go back to the heading and altitude (and of course roll the elevator trim way high! UGH!). I have found there to be a "bug" in the 172 autopilot (KAP-140) as well. Whenever I engage the autopilot, which I usually only use in HDG or NAV mode, it takes pitch authority even though I don't have ALT hold set. I get around this by toggling the ALT hold on and off whenever I engage the autopilot. I usually don't use the ALT modes, so you may want to try toggling ALT ON, OFF, then back ON and see if you still have the problem. |
#2
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Thanks for your reply Jim:
I will try that! I generally use ALT/NAV/ and in the jets ALT/NAV/IAS because I tend to like to take a lot of long flights-east coast to europe, europe to asia west coast to oceania etc, in real time, not multiple sessions, so if I'm away from the computer for awhile i.e. sleeping or whatnot, the plane can continue to its destination or next stop if refueling is needed. If I'm still snoozing it will circle the airport till I get back to it (unless it flames out or runs out of fuel hehe). Regards to all and thanks so much for your help! "Jim Hendrickson" wrote in message news:uWNvb.5142$dO2.4437@lakeread03... "SouthBayGuy" wrote in message link.net... Hello Everyone: 2. Auto Pilot Problem-Now THIS is the thing that is frustrating. When I'm flying any of the lighter aircraft, really anything other than the airliners, when the A/P is set for altitude it keeps the trim so nose high, the airplane can't pass 80 knots or so. This is especially bad in the 172 182 and Mooney. The twins do it to an extent; it doesn't really happen in the jets because you can set the A/P to maintain IAS. Is there ANY way to stop the A/P from setting the trim so nose high? I've also noticed that when flying along in A/P that periodically the plane will suddenly act like it was hit by a gust (even with wind turned off), slip, raise and fall a bit, then try to go back to the heading and altitude (and of course roll the elevator trim way high! UGH!). I have found there to be a "bug" in the 172 autopilot (KAP-140) as well. Whenever I engage the autopilot, which I usually only use in HDG or NAV mode, it takes pitch authority even though I don't have ALT hold set. I get around this by toggling the ALT hold on and off whenever I engage the autopilot. I usually don't use the ALT modes, so you may want to try toggling ALT ON, OFF, then back ON and see if you still have the problem. |
#3
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Unfourtunately this didn't help...as soon as I ENGAGE the A/P...it starts
dialing the trim UP UP UP...Even with just NAV set. It must be a problem in my system somewhere :0( "Jim Hendrickson" wrote in message news:uWNvb.5142$dO2.4437@lakeread03... I have found there to be a "bug" in the 172 autopilot (KAP-140) as well. Whenever I engage the autopilot, which I usually only use in HDG or NAV mode, it takes pitch authority even though I don't have ALT hold set. I get around this by toggling the ALT hold on and off whenever I engage the autopilot. I usually don't use the ALT modes, so you may want to try toggling ALT ON, OFF, then back ON and see if you still have the problem. |
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