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Here is my other problem that I am wanting to tackle right now. When you
pull the yoke all the way back, it doesn't stay straight when it's clear back. I would like to put the gust lock pin in and see if while its in, if the elevator is in the neutral/straight position. However, I can't because the gust lock part, that holds the pin is missing all together! On some Cessnas particularly the 182 for sure the control yoke lock does not lock the elevator in neutral but slightly nose up. Giving the elevator a nose down force. This is to prevent the aircraft from taking off with the control yoke lock installed or otherwise locked, for example with something less visible than the factory lock. Elevators are set to neutral for rigging by using an external lock, typically a couple of pieces of soft wood and a long bolt or screw. If I have someone pull the yoke all the way back and I go back and lift the elevator, it moves about 2 more inches up before I feel it hit the stops. Sounds like the elevator at least is seriously out of rig. Properly rigged the elevator should hit the stop and then any internal stop under the panel should hit. Some aircraft don't have an internal stop or only have one. But in any event if you have two inches of movement on the elevator with someone pulling the yoke back you have a problem. I would also check the ailerons and rudder for similar rigging problems. John Dupre' |
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That makes some sense. I would think that the elevator being in the
neutral position should hold level flight at cruise though making it not have much lift at takeoff speed. That would be the case in an aerobatic plane that didn't have a negative incidence on the horizontal stabilizer built in for auto correct.. If neutral at takeoff caused a climb, then cruise speed would take a negitive force either by the elevator, or by the trim tab to keep the nose down at cruise which would make extra drag. I don't doubt that the gust lock holds it negitive but I don't think it would be for that reason. Hope that's worded okay, hard to explain. On some Cessnas particularly the 182 for sure the control yoke lock does not lock the elevator in neutral but slightly nose up. Giving the elevator a nose down force. This is to prevent the aircraft from taking off with the control yoke lock installed or otherwise locked, for example with something less visible than the factory lock. Elevators are set to neutral for rigging by using an external lock, typically a couple of pieces of soft wood and a long bolt or screw. Agreed, we will check it over comepletely. Wayne Sounds like the elevator at least is seriously out of rig. Properly rigged the elevator should hit the stop and then any internal stop under the panel should hit. Some aircraft don't have an internal stop or only have one. But in any event if you have two inches of movement on the elevator with someone pulling the yoke back you have a problem. I would also check the ailerons and rudder for similar rigging problems. John Dupre' |
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