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General control line discussion => Open Forum => Topic started by: andreas johansson on June 08, 2007, 02:42:55 AM
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Hi
I´m curious, how does monoline work? How can you steer the aircraft with just one line?
Andreas
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It's magic. ;D
The one line is solid and is turned clockwise or counter clockwise for control input. Maybe someone can post a diagram of the system.
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Ok, I see. There must be a very special kind of handle then :)
Andreas
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Imagine a Yankee Twist Drill, Clint. You hold the handle with one hand and push-pull a knurled knob which causes the shaft to spin in one direction or the other. At the outerend (toward the plane), there's an interlocking latch which holds the line (.014 for ½A - - .021 for a .35 stunt plane) to the drill.
In the plane, there's a worm-and-cam which translates the radial spin of the line into a fore-and-aft motion like a conventional bellcrank.
In the Speedmaster Control Units, the process is even simpler. A vertical arm is rotated fore-and-aft by the spin of the line Motion is limited by air pressure on the control surface(s).
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Here is a picture of a handle and torque unit might help understand . The bobbin on the handle slides up and down the twisted wire which turns the wire to the torque unit in the airplane.
Willis