tail pitch problems

[stelliott]

i just got my raptor set up and have put about tanks of fuel in it, for some reason it is not responding to my tail controls at all, after starting and idling up it goes in into a right hand spin if your looking from the back of the bird. if there is anyone out there that could help me on this please?

steven

[Motions]

WOW! Where to begin. It could be a number of things.

The first thing that comes to mind is the gyro is reversed. Can you tell us what gyro and servo your using and how you setup the tail?

[stelliott]

the gyro is a futaba gy 401 and a 9254 servo.... i did not set up the tail of the heli i had someone bild it for me but i cant seem to get ahold of him

[Motions]

I would definately go through the setup of the tail again to make sure everything is correct. Setup is 80% of flying helis and I can't express enough how important it is to learn how all the systems work and how to correctly set everything up. If you rely on someone else to setup and repair your model, your not going to have much fun in the hobby.

Do you know how to check for a reversed gyro and servo on the tail?

[stelliott]

no i do not could you please advise me how!

thanks for all the information

steven e elliott

[Motions]

This should get you started:

First, check for correct assembly of the tail rotor:
Stand on the right side of the helicopter looking at the tail rotor. Rotate the tail so that one blade is pointed straight toward the front. The leading edge of the front blade need to be pointed up. The blade grip arm for that blade also needs to be on the top. Rotate the tail rotor so the other blade is point to the front and check it also.
http://www.raptortechnique.com/images/tail01s.jpg (http://www.raptortechnique.com/images/tail01.jpg)

Check that the belt is the right direction:
Rotate the main gear so that the main blades spin clockwise (as viewed from the top) the tail needs to rotate counter clockwise (as viewed from the right side of the helicopter). If not, then when you installed the belt you did the 1/4 turn the wrong direction.

Check radio/gyro:
Move the rudder stick to the right, the control rod for the tail should be pulled toward the front of the helicopter. Next pick up the helicopter by the rotor head. Grab the tail boom and quickly rotate the helicopter so the nose goes to the left. Watch the control rod, it needs to move forward. If it does not then the gyro is reversed.

Check gyro mounting:
Replace the mounting tape if needed. The gyro should feel like it's on a cushion, if there is any slop then replace the tape.

Check rudder position:
Make sure the gyro is in rate mode. With the rudder stick on the radio centered and the trim centered there should be 4.5mm between the pitch slider and the tail rotor casing with the collective stick centered up/down and left/right.
http://www.raptortechnique.com/images/tailpitchs.jpg (http://www.raptortechnique.com/images/tailpitch.jpg)

Flying:
First, start the engine and verify that it is not turning backwards. Get the heli light on the skids (not off the ground) and give a small right rudder command. If the nose goes to the right and it rotates at the corresponding speed then try going to left. If the nose goes left, then you are set to go, if not then if everything before was correct then the gyro is having a vibration problem.

[stelliott]

thanks motions for all the info i have tryed all of the advice that you have giving me and still am having the same issues. The last thing to check is the vibration issue i have checked and rechecked the tail ass but all looks good there....

thanks again for the info

steven e elliott