Tail-rotor help please

[mcnscott]

hello,

I've spent hours dialing in my raptor 30 V2. My problem is I just can't get the heli to stop counterspinning. I have to put full right rudder trim when I'm not In HH mode, and then push the lever to the right a hair.

When I'm in HH mode the gyro puts so much right rudder on that the heli won't lift off the ground. I thought my mix was too rich because when I give it full throttle in HH mode the engine dies. I have adjusted the high needle from 3 turns out all the way to 1 turn out with the same result every time.

When the gyro HH mode is off and servo centered my rotor slider has the 4.5 mm space raptor techniques says. But I just can't get it to work right. Thank you!

I've checked out the gyro and stuff. When I first started it spun wildly, but I reversed it and now the spin is very slow, however, it is still spinning nontheless.

[tdswan]

OK.....As far as your mixture goes, it won't have THAT much affect on your tail unless the engine is running VERY poorly. Put your high speed (big) needle at 1 3/4 to 2 turns out from closed (not tight, just from where it stops turning) and stop worrying about that. Put the low speed at whatever it was at from the factory for now unless you are in and extreme altitude situation and let's concentrate on the tail....Making sure your headspeed is somewhat close to right as well.

First.....This advice will only help assuming everything in the rest of your mechanical build is correct or at least close to what the manual says. If your'e struggling with anything else, you need to first address those problems because they all can effect the tail.

Now....assuming everything else is squared away, let's get that tail to behave! Knowing the gyro and servo combo would be helpful, so these will be general directions. Make sure your tail linkage is COMPLETELY as friction free as you can get it!!!! THIS IS PARAMOUNT!!! All linkages MUST NOT bind and all your control rod guildes must me in line perfeclty, all ball-links must be resized in the linkage, bearing running freely and blades spinning in the right direction (if it were a wheel, it would pull the heli backwards). The ball on the servo horn should be on the outer hole OR per the gyro directions from center on the tail servo (it will usually say minimum XX mm from center).

Next... When the gyro is in Rate mode (with no stick inputs and no trim), the grey linkage should line up with the tail output shaft (or 4.5 mm per Raptor Technique). KEEP IN MIND that some gyros will not initialize correctly unless they are in HH mode when turned on. IF your gyro has a travel limit pot, now is the time to adjust the trimmer pot so that the linkage travels the full length of the tail output shaft and DOES NOT go too far or you run the risk of burning up your tail servo. Push your rudder stick all the way in one direction or the other and adjust the trimmer pot accordingly to get the most travel without binding in BOTH directions.

Fire it up...Once you lift off in rate mode, get it into a stable hover and note if the tail drifts either way. If the NOSE moves left, you need to put more pitch on the tail blades, if it moves left, less. Adjust this by shortening and lengthening the linkage with one of the ball-link ends by turning it in or out accordingly. You should not need or use any trim on the tail at all. Make all the adjustments mechanically.

Once you've got it perfect or at least so close that any more adjusting would throw it off the other direction, you're done! Flip it to HH mode and start playing with the gain. :D

Good luck, I hope this helps. I've re-vamped my explaination to make it as clear as I can. I've had others get a little confused. I hope it's clear.

Good luck!!!

[hellian]

I was having some of the same problems. I did some of the things tdswan already mentioned, plus I went back and took the boom out, and made sure the tail drive belt was properly set, and nice and snug.

[heli-cuzz]

I was having some of the same problems. I did some of the things tdswan already mentioned, plus I went back and took the boom out, and made sure the tail drive belt was properly set, and nice and snug.

Your tail belt should not be snug.

Squeeze the belt together right behind the belt drive gear. It should be about a 1/4 inch space between the belt when squeezing together. A belt that is to tight will decrease the life in your tail bearings and belt as well.

[Motions]

Actually on the Raptor, your tail belt should be fairly snug. Pressing on the belt between the drive pulley and idler pulley should give you about 1/8"-1/4" of movement. If it slaps the inside of the boom, it's too loose.

[tdswan]

Bumpin' it up.