Anyone fly gassers? I just started, and am having problems. - RC Groups
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Aug 30, 2003, 03:02 AM
OldSchool
OldSchool
Guest

Anyone fly gassers? I just started, and am having problems.



I get the heli up to speed, but then the tail violently thrashes
counter clockwise. The receiver is a pcm, gain and mode (HH or nl) on
the gyro make no difference.

The heli is an xcell 60 graphite.

It seems like a radio glitch, but should this happen with pcm?

Any thoughts most welcome.


Aug 30, 2003, 03:02 AM
Steve Simpson
Steve Simpson
Guest

Re: Anyone fly gassers? I just started, and am having problems.


> I get the heli up to speed, but then the tail violently thrashes
> counter clockwise. The receiver is a pcm, gain and mode (HH or nl) on
> the gyro make no difference.


Has this heli ever flown, or is it a new setup? If new, you may have the tail rotor reversed.

With all the radio gear turned on and the gyro initialized, yaw the boom and see if the tail
rotor blades pitch the correct direction to counter the yaw.


Aug 31, 2003, 03:02 AM
Gordon Dunn
Gordon Dunn
Guest

Re: Anyone fly gassers? I just started, and am having problems.


What type of gyro and tail servo configuration are you using? are the wires
routed away from the magneto?

GD




"OldSchool" <OldSchool@here.com> wrote in message
news:4e50lv0a9tklhpoomth0cq94ctfb878733@4ax.com...
>
> I get the heli up to speed, but then the tail violently thrashes
> counter clockwise. The receiver is a pcm, gain and mode (HH or nl) on
> the gyro make no difference.
>
> The heli is an xcell 60 graphite.
>
> It seems like a radio glitch, but should this happen with pcm?
>
> Any thoughts most welcome.
>
>



Sep 01, 2003, 03:02 AM
Mike
Mike
Guest

Re: Anyone fly gassers? I just started, and am having problems.


>
>
>
>I get the heli up to speed, but then the tail violently thrashes
>counter clockwise. The receiver is a pcm, gain and mode (HH or nl) on
>the gyro make no difference.
>
>The heli is an xcell 60 graphite.
>
>It seems like a radio glitch, but should this happen with pcm?
>
>Any thoughts most welcome.
>


It seems like the gyro is reversed. One of the easiest ways to set up a
tail/gyro configuration is to do this:-

Turn radio on at tranny and on model.
Stand a tail blade UP. Move the tail rotor control lever (on the tranny) to the
left, and then when the model is viewed from behind, the BACK of the tail blade
should also move to the left. If it doesn't, reverse the servo.
When you have made sure it is working in the correct sense, then watch the
servo arm as you move the tail control lever to the left. The arm will move
either forward or back, remember the direction. Say for example it moves back.

Now hold the rotor head, and sharply twitch the nose of the model to the RIGHT,
while watching the servo arm. Its FIRST movement should be in the same
direction as the direction already observed (in our example it was backwards).
The servo will quickly try and centre so you are only watching for its first
movement. If the direction of servo arm travel is opposite to what you want,
then you will need to reverse the gyro NOT the servo.
This method works for all helicopters not just gassers. If all checks out then
it could be all sorts of other things (headspeed too low, tail blades wrong way
round, slipping drive shaft, etc)

It is very doubtful this is a radio glitch. If it was, the heli would be all
right some of the time, and not others. Also you would see it in movement of
the other servos as well.




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