RunRyder - tail spinning

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Beginners Corner > tail spinning

kingtweeter
Heliman
Location: Oregon

Need help, first helicopter,Hirobo Eagle 2 EX,icg400,when the rotor speed comes up, the tail starts to spin counter clockwise really fast until I correct it the it then it almost stays where I put it should it do this everytime I start it does not sound right to me,can anybody help

04-30-2002 Over year old.

poerQwa
Veteran
Location: Rotterdam, The Netherlands

Sounds like a setup problem to me.
You should always try to get your mechanical setup close to perfect before correcting things on your transmitter.

Try correcting your mechanical tailrod setup before going to your transmitter

, maybe your gyro adds something but I don't know how the ICG operates.

Good luck,

Regards,

Marc

04-30-2002 Over year old.

z11355
rrMaster
Location: 10000 is enough time wasted.

sounds like you need to verify:

1. tail servo direction is correct (w/o gyro)
2. gyro direction is opposite the correct servo direction.

Give a right tail rotor command, the t/r control rod should be
pulled forward toward the canopy. If not, reverse the servo in the TX.

Then, holding the machine, jerk the tail to left (clockwise), you should
see the gyro command the t/r control rod backwards.

04-30-2002 Over year old.

HOMEPAGE

kingtweeter
Heliman
Location: Oregon

Ok lets see if I understand any of this,With the gyro unhooked,I move the stick to the right the t\r control moves towards the canopy,if I hook the gyro up it does the same.With the gyro hooked up and on when I turn the helicopter clockwise it pushes the t/r out,so I guess I should turn it around in the radio.....sorry this my first time at this and it makes no sense yet

05-01-2002 Over year old.

z11355
rrMaster
Location: 10000 is enough time wasted.

if the rod moves forward when you give it
a right command but moves backwards when
you jerk the machine (thereby simulating a right
command), then the 'direction' of the servo
and gyro is correct.

It may a simple matter of the t/r not being set
correctly. To get into the ballpark, fold the
tail blades together. You should have about
1.25-1.5" of space between the tips of the tail
blades when the Tx stick is untouched and
in the center.

BTW, are you aware that an Eagle 2 EX is
quite expensive to learn (read: crash/repair)
on? It is worth considering buying a lowend
30 size machine to learn on and put the Eagle
on a shelf for a while lest you burn out on spending lots of $$$ buying parts for the Eagle
if/when you crash.

05-01-2002 Over year old.

HOMEPAGE

kingtweeter
Heliman
Location: Oregon

Ya I know the parts thing I buried in the ground last night,I found out today.......the school of hard knocks......on the wallet too.I think part of the problem is the servo that goes to the tail rotor it is a 9202,not fast enough.I will find out this weekend if the tail still spins like that I need to look some where else for the problem.I really new better when the tail started going around and around that I should stop and try to find the problem.Also it wags really hard in flight,that started a mess that I could not get out of.So I have a digtal servo coming,and a few parts also.If this happens to much more I will get a smaller one to learn on.Thanks for your help

05-01-2002 Over year old.

z11355
rrMaster
Location: 10000 is enough time wasted.

the 9202 isn't part of the rapid spinnning
problem. The wagging is another story and
you can sort of control that by reducing the gain
of the gyro.

I'd strongly recommend finding some
experienced local help, even if you have to
do some serious driving.

05-01-2002 Over year old.

HOMEPAGE

Helinuts
Senior Heliman
Location: Knoxville

9202

ya the servo is ok i have a Raptor i beat the snot out of with a 9202 and a csm 540 it will wag with hard 3d but it holds solind in normal flight and so should yours ........

05-04-2002 Over year old.

Virtual1
Senior Heliman
Location: Waterloo, Iowa - USA

I'm assuming you don't have a HH gyro, or it's not in HH mode, so it's spinning a little around on lift-off or while light on the skids. You might be spooling up with the tail blades pitched way to one extreme or the other. It's a good idea to "zero" your tail blades before spooling up. If they start with a bit of pitch to them, as soon as you go light on the skids it's going to try to turn, until your gyro can catch it anyway. Also, if you have a heading-hold gyro, make sure it's in heading-hold mode.

05-04-2002 Over year old.

HOMEPAGE

kingtweeter
Heliman
Location: Oregon

Ya....I have found to much on the setup of this copter I took the word of somebody else about how well setup it was.If anybody can answer this question it would be very helpful,I was looking to set the tail rotor servo rod ,if I center the travel on the shaft, the rotor blades are pitched way more one way than the other is that normal,or should the blades have no pitch in neutral

05-04-2002 Over year old.

Virtual1
Senior Heliman
Location: Waterloo, Iowa - USA

There are two things to keep in mind when setting up your tail linkage.

1. you want the servo arm and the linkage to meet at or very close to a 90 degree angle. Center the tail servo. Then take the servo's arm off the horn and adjust its position on the horn to be at a nice right angle wit hthe linkage. (you can usually get it within a few degrees if you want to be picky about it)

2. the tail blades will need to have a small amount of pitch to them to counter the main rotor torque when hovering - about 10 degrees iirc - this is your "neutral" point. That's where you want the linkage to be placing your tail blades when the servo is in that centered 90 degree position in step 1. By 10 degrees pitch I mean 10 pushing the opposite direction your blades turn. For a clockwise rotor as viewed from above, this would be blowing to the right side of the heli, as viewed from the tail. You'll need to adjust the length of the linkage (hopefully just adjust a ball link a few twists) to get this set right.

The finishing touch is to set the travel limit of the tail rotor servo on your gyro to prevent it from binding (meeting the mechanical limit) at either extreme. If your heli was designed properly, it should have about the same amount of pitch difference in both directions, from the 10 degree center, and the max travel in both directions should just meet the mechanical limit of the tail pitch slider in both directions. So if it centers at +10 degrees, it might have a pitch range of -20 to +40 degrees. It's not critical that these numbers be perfect.

05-05-2002 Over year old.

HOMEPAGE

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Beginners Corner > tail spinning

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