redbarondos Posted May 1, 2013 Share Posted May 1, 2013 hello everyone. I hope some among you could help me: moving the throttles to ground idle from flight engine torque is as follows # 1500 lbs # 2500 lbs # March 1700 lbs # 1700 lbs, it does not happen every time, however What is worrying is that the plane winks right not left as would be expected Quote Link to comment Share on other sites More sharing options...
Steve1300 Posted May 1, 2013 Share Posted May 1, 2013 I would expect the aircraft to yaw right (is that what "wink" means?). From F.I. to G.I., it still puts our positive torque which would pull the left wing forward more than the right one. I would also expect that your prop is not dropping past the low pitch stop every time in the same manner as the others. Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted May 1, 2013 Share Posted May 1, 2013 Is the Low pitch stop retracting? Sounds like it is NOT... This is why your aircraft is moving right (Forward thrust) TQ on the left; ground idle blade angle on the right (DRAG) so you "wink" right. Check for the LPS to retract... Quote Link to comment Share on other sites More sharing options...
SEFEGeorge Posted May 1, 2013 Share Posted May 1, 2013 LPS sounds like the culprit to me. Could be a nasty situation given the right circumstances. Quote Link to comment Share on other sites More sharing options...
redbarondos Posted May 2, 2013 Author Share Posted May 2, 2013 We have check low pitch stop several times and it's ok. But right now the situation is worst Engine 1 2 3 4 Lbs 500 500 1700 1700 any idea? Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted May 2, 2013 Share Posted May 2, 2013 Start engines, record NULL start temps, record minimum TQ readings, go to reverse get TQ and FF readings, go to Flight Idle get TQ and FF readings, advance throttles to crossover record TQ and FF and also watch the TIT change (Rich/Lean) and record TIT increase or decrease. Retard Throttles to Flight Idle record TQ and FF, Ground Idle record time for LPS retract as well as TQ and FF numbers... Quote Link to comment Share on other sites More sharing options...
Lkuest Posted May 2, 2013 Share Posted May 2, 2013 We have check low pitch stop several times and it's ok. But right now the situation is worst Engine 1 2 3 4 Lbs 500 500 1700 1700 any idea? If you've got 500 in lbs in High Speed Ground Idle, you definately need to calibrate your torque indicators. It takes much more than that just to maintain RPM within limits. Even in Low Speed, it's typically between 600-800. Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted May 3, 2013 Share Posted May 3, 2013 Start engines, record NULL start temps, record minimum TQ readings, go to reverse get TQ and FF readings, go to Flight Idle get TQ and FF readings, advance throttles to crossover record TQ and FF and also watch the TIT change (Rich/Lean) and record TIT increase or decrease. Retard Throttles to Flight Idle record TQ and FF, Ground Idle record time for LPS retract as well as TQ and FF numbers... The reason I ask is because these numbers make no sense to me... Engine 1 2 3 4 Lbs 500 500 1700 1700 Quote Link to comment Share on other sites More sharing options...
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