M4 flap settings
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M4 flap settings
So I read some short little snips about an STC to increase the flaps on an M4 from 15/25 to 20/30. Is this an actual approved mod and if so what is actually involved. I researched this a bit and couldn't come up with anything solid. [/i]
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Maule has the later ratchet. 30 mins to exchange and re rig flaps.
You get more flap deflection if you do not have the sliding gust lock mechanism which can be removed if you have it, but if you have the flap travel bridle cable, just move it along the hinge shaft.
Re bush the flap bell crank and replace its bolt to improve flap action also.
You get more flap deflection if you do not have the sliding gust lock mechanism which can be removed if you have it, but if you have the flap travel bridle cable, just move it along the hinge shaft.
Re bush the flap bell crank and replace its bolt to improve flap action also.
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Early ratchet is 15/35 degrees
Late ratchet is 20/40 degrees
Occasionally it is said that a 20/40/45 is seen though the flap handle needs reinforcement.
Many flaps are not adjusted correctly so full deflections under air load are not achieved, thus those aircraft have a fast final approach speed.
With upward hand pressure the flap should be flush with bottom of wing.
There should be a rubber/fabric pad glued to rear spar which bell crank bottoms against.
Flap return springs should hold bellcrank against this pad.
Bellcrank should not move up and down on the pivot bolt, only swivel.
Do not use alignment with wing root fairings or wingtips to set baseline adjustment for flaps or ailerons, Use alignment with bottom wing skin.
Late ratchet is 20/40 degrees
Occasionally it is said that a 20/40/45 is seen though the flap handle needs reinforcement.
Many flaps are not adjusted correctly so full deflections under air load are not achieved, thus those aircraft have a fast final approach speed.
With upward hand pressure the flap should be flush with bottom of wing.
There should be a rubber/fabric pad glued to rear spar which bell crank bottoms against.
Flap return springs should hold bellcrank against this pad.
Bellcrank should not move up and down on the pivot bolt, only swivel.
Do not use alignment with wing root fairings or wingtips to set baseline adjustment for flaps or ailerons, Use alignment with bottom wing skin.
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