Nose turns slowly to the left ???

[cannonspaceball]

Hello, I a Newbie, I bought a heli the middle of January not knowing sod all about anything to do with heli's, I have been out to night and flown my 7th and 8th tank ever.

I can get my Raptor to hover but have a problem that I cant figure out.

The nose turns very slowly to the left no input on rudder

Raptor 30v2 39tt DX8 TX
Gyro gy401 s9254 tail servo mounted on tail boom

Tried a mechanical set-up the 4.5mm gap tail (Raptor technique)

I have tried to hover in Rate(normal) mode but find myself over compensating the rudder and if it turn towards me put it back down, but when i did keep in straight it's only about 3 clicks(left) on the trim to keep it straight or so I think, As only new at this I have not got the confidence to even let the tail go more than 90 degrees.

I have centred trim and re initialized the Gyro.Then played with Gyro rates from 20% to 90% but made on difference the nose still turns to the left very slowly.

Cant see any binding in linkages and all free and move smoothly

But I have noticed tonight the clutch seem to grinding a little would this cause vibration and confuse the Gyro.....It going to have to be looked at/replaced anyway, got to figure out how to do that as well.

Cheers

[horsham rc]

are the trims on you tx all centered? have you tried one click at atime on the trim? gyro rates (20=90) one of those settings would be out of headinghold i think? not good...im to a beginner and have little info that will be correct but this may help.
im sure you will get the aswers soon.

[challis349]

Have you tried altering the tail linkage, I can't remember if it needs to be longer or shorter, but change it by on full turn in one direction, if this gets worse, twist the ball link 2 full turns in the opposite direction to see if it gets better

[cannonspaceball]

Rubber trim is in the centre when I had it in HH. I could of been a bit clearer I have tried the Gyro gain in the TX at various setting ranging from 20 to 90 eg at 20,30,40,50,etc

I tried to trim out of HH hold but not good enough yet to keep the rappy level.

Cheers Horsham

[challis349]

Shouldn't really use trim in hh anyway, I meant on the linkage rod going from servo to the tail, sounds mechanical, not something in tx

[davie]

nose turning to the left normaly is vibration related if everything is set up ok ,what you can do is try tying the gyro down a bit tighter with velcro this will change how the vibs react with the gyro if it stops the drift then you should be looking to see what i causing the vibes

[waveydavey]

Unfortunately the 401 does this. You'll get posts now that say no they don't you just have to set them up right.

Try setting the mechanical linkage so that the nose doesn't move when into the wind. You can tell which way to adjust it by if it's nose left and you have to add nose right to counter it then when the heli is on the deck push rudder right see which way the linkage needs to be adjusted to give you right trim. Don't guess, you don't need to, once it's holding into the wind without any drift, let the gyro initialise again and see if it's any better. What sort of mount is it on, hard or soft?

[cannonspaceball]

Thanks Everybody,

The Gyro is mounts at rear it was brand new and stuck down with the double sided tape that came with it,(pic) added attachment (if it worked)
Is that good enough or should I be looking for alternative method to stick it down?

Think the trim is slightly out so will try turning links one turn at a time, and see what happens,

I tried to hover the heli into wind, across and down wind as I thought it might be the wind but does the same.

Davie mentioned vibration, I've turned the blades tonight and can hear grinding from the clutch area so that needs looking at....Would this cause vibration enough to effect the Gyro.

And just a quick thanks to everybody as only join here a few days ago and lots of help already.

[waveydavey]

The grinding part doesn't sound too good.

[cannonspaceball]

The grinding part doesn't sound too good.

Great just what I wanted to hear LOL.....If I just ignore it just will it go away.........Time to take the engine out I thinks

[Steve]

You must make sure that gyro is in HH mode when you turn it on, with no sub or stick trim added. You can add a bit of trim once it's flying, but must remember to put it all back to zero every time you restart for the next flight.

Do the rate mode setup process and adjustment as well to get it to hover hands off as Dave has said already with zero trim. Then restart in HH mode.

Learn to fly it as it is - you're at the early stages of flying and probably are trying to avoid using the rudder at the moment, but just get used to adding a tiny dab of right rudder as and when required to bring it back to tail in. You're going to have to start flying the rudder as you improve, so why not start now?

Clutch grinding - is this when the heli is hovering or when it is on the bench? If it's during flight then probably a bearing has gone in the starter stack and yes this would cause vibes.

[kerhs]

Trim it in heading hold until the drift has gone, land, motor off, Flick the gain switch in and out of heading hold 3 times with the switch landing back in heading hold. Turn the heli power off, put the tx rudder trim back to zero. Then test fly again.

I think it also tells you in the instructions, but its been a while since I've used a 401.

[cannonspaceball]

Cheers Steve, just been to have a look at the heli & thought would remove the starter coupling to see if I could see any visible play in the bearing, found the bloody thing was just about to fall off.

Fixed it back on.... loctited in the grommet screws now, I've spun the blades and the grinding grating seem to have gone fingers crossed its fixed it.

Will try what you've said and good point will have to use that rudder soon or later.

[cannonspaceball]

Kerhs..just got the instruction out it does say in that but hadn't a clue what it was about when fitting it.

Going to print this out and take it with me for a fly tommoz weather permitting.

Thanks everybody got lots to try now.

[cannonspaceball]

Thanks Everbody,

Been out tonight and flown 2 tanks, the grinding noise has gone, must of been the starter coupling coming loose.

The nose turning left, I have turned linkage in 2 turns shorter(more pitch on rear blades) and it's just sits straight now in HH

A Happy flying bunny now