Mixing on a cap/rudder
#1
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Mixing on a cap/rudder
I fly a midwest cap/bme50 combo. Flies great, with one issue. Requires about 30% mixing rudder/elevator to knife edge...seems like a lot. Without mixing it pitches to the belly.
If I keep the mixing on it ruins all of my straight line maeuvers, because when I try to correct with the rudder for wind changes it pitches up.
How are you guys doing it??? Is this typical for a cap???
If I keep the mixing on it ruins all of my straight line maeuvers, because when I try to correct with the rudder for wind changes it pitches up.
How are you guys doing it??? Is this typical for a cap???
#2
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Mixing on a cap/rudder
Just some thoughts........
30% is a lot. Are you real tailheavy?
You could a assign the mix to a switch enabling you to only activate it for sustained knifedge.
30% is a lot. Are you real tailheavy?
You could a assign the mix to a switch enabling you to only activate it for sustained knifedge.
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Mixing on a cap/rudder
Like OnTheEdge, I'm thinking that 30% mix requirement is a lot. If BPU699 is real tail heavy requiring a lot of "down" elevator to lift the tail for for straight and level flight, that would increase the amount of "up" necessary when in knife edge (to counteract the "down" already in). Moving the cg forward would definitely help. Wonder what elevator correction is need to maintain straight and level INVERTED flight? If it climbs uncorrected, then that proves the very tail heavy theory.
I balance my planes to require a very slight "push" elevator to maintain level inverted flight, and that minimizes the amount of mix necessary to correct rudder elevator coupling issues. I also haven't found I need a lot of stick throw for wind correction. Quarter stick or less is adequate, and produces only slight movement in the elevators (due to the always on mix) which doesn't produce big pitch changes.
Or, like others said, you could put the mix on a switch.
I balance my planes to require a very slight "push" elevator to maintain level inverted flight, and that minimizes the amount of mix necessary to correct rudder elevator coupling issues. I also haven't found I need a lot of stick throw for wind correction. Quarter stick or less is adequate, and produces only slight movement in the elevators (due to the always on mix) which doesn't produce big pitch changes.
Or, like others said, you could put the mix on a switch.