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rex aileron & elevator control

Old 10-13-2006, 06:09 PM
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Default rex aileron & elevator control

Hey guys:I have a new problem with my rex.When I put in aileron I get very little movement and full elevator movement if I turn the rotor 90* I get full aileron and very little elevator.Same thing each 90* turn.These turns are done by hand,if I try to fly the controls are very sloppy,very little control.Before this she was flying great.
thanks Fred
Old 10-13-2006, 06:12 PM
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Default RE: rex aileron & elevator control

When you say full elevator movement are you watching the paddes?

The paddles move 90 degrees before the action occurs so if the paddles are out left and right then the elevator stick should move them, if they are straight out and back then the aileron stick should move them. If you are getting interaction your servos and linkages probably arent 90 degrees.

Slop is due to something being loose or incorrectly assembled.
Old 10-13-2006, 06:16 PM
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Default RE: rex aileron & elevator control

Hi,yes the paddles are moveing,same as the servo,s every 90*
Old 10-13-2006, 07:47 PM
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Default RE: rex aileron & elevator control

Make sure everything is tight, but that the pushrods move very easily without being sloppy or loose. If the servos are a bit loose or the gears in the servos are stretched you'll get sloppy controls. Helis must be basically perfect to fly right so routine maintenance is very important.
Old 10-14-2006, 01:48 AM
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Default RE: rex aileron & elevator control

If I'm reading this correctly that is what is suppost to happen. All actions start 90 degree before it suppost to, this allows the flybar to be in the correct postion when it's suppost to. IE the flybar starts to turn upwards when it is over the nose so that when it gets to the right of the helicopter it is in the up postion. Hope that made since, to further make it clearer do this by hand. Put an input into the Tx now push the flybar up or down as if it was flowing with the air and you will see that the flybar is in the correct location for what you want the helicopter to do.
Old 10-14-2006, 08:01 AM
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Default RE: rex aileron & elevator control

Its called gyroscopic precession.
Old 10-14-2006, 02:42 PM
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Default RE: rex aileron & elevator control

the back of the swash plate comes up when its turned by hand.I have checked all the rods and all the control hourns are 90*
thanks Fred
Old 10-16-2006, 09:55 AM
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Default RE: rex aileron & elevator control

ORIGINAL: ffdq

the back of the swash plate comes up when its turned by hand.
The swash plate should ONLY move if you move a TX stick. If you turn the blades by hand and the swash plate tips then something is broken between the swash plate and the servos.

Follow ALL the links from the swash plate downwards. Check for cracked plastic and loose screws.
Old 10-16-2006, 12:35 PM
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Default RE: rex aileron & elevator control

Hey guys,I found the problem well the guy in my lhs found it.It turned out to be the washout linkage screwa were to tight and not letting the swashplate move.I tighten the scerws while I was going over everything.No exp.on helis.killed me.Thanks for the help.
Fred

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