Confused about reversing gyro.....

[Huckleberry]

In one of my recent posts concerning the replacement of all the servos with hitec hs-65mg servos, I encounted a problem with the tail going crazy. I was advised to reverse the gyro.

Am I correct in assuming that the gyro needs to be reversed in the transmitter? The direction is correct with my inputs to the tail. The problem is not direction but sensitivity. A little bit of throw of the rudder stick will make it want to do 360s. I have made adjustments for the gyro in heading hold and rate modes.

I started in rate at 25. No good. Went all the way up to 49......same problem. Then, I selected HH and started at the default 66.5 and went both up and down from there. No good. But, the already known issue of the slider drift while in HH just added to the problem. With that said, I have always preffered to fly in rate mode.....no drift. Which mode do most folks fly in and what are the most common values for each mode do folks use?

Thanks!

Huckleberry

[bladelearnin]

Originally Posted by Huckleberry

In one of my recent posts concerning the replacement of all the servos with hitec hs-65mg servos, I encounted a problem with the tail going crazy. I was advised to reverse the gyro.

Am I correct in assuming that the gyro needs to be reversed in the transmitter? The direction is correct with my inputs to the tail. The problem is not direction but sensitivity. A little bit of throw of the rudder stick will make it want to do 360s. I have made adjustments for the gyro in heading hold and rate modes.

I started in rate at 25. No good. Went all the way up to 49......same problem. Then, I selected HH and started at the default 66.5 and went both up and down from there. No good. But, the already known issue of the slider drift while in HH just added to the problem. With that said, I have always preffered to fly in rate mode.....no drift. Which mode do most folks fly in and what are the most common values for each mode do folks use?

Thanks!

Huckleberry

yes the little switch on the gyro has to be reversed also because it is compensating inthe wrong direction try it ttyl John

[Slyster]

I think you will need to reverse RUDD in the radios revserse menu too.. so both gyro AND left stick work right.

[bladelearnin]

Originally Posted by Slyster

I think you will need to reverse RUDD in the radios revserse menu too.. so both gyro AND left stick work right.

I think he already did that when he put the hitec on the tail.https://www.helifreak.com/showthread.php?t=100707

[bladelearnin]

Originally Posted by Huckleberry

In one of my recent posts concerning the replacement of all the servos with hitec hs-65mg servos, I encounted a problem with the tail going crazy. I was advised to reverse the gyro.

Am I correct in assuming that the gyro needs to be reversed in the transmitter? The direction is correct with my inputs to the tail. The problem is not direction but sensitivity. A little bit of throw of the rudder stick will make it want to do 360s. I have made adjustments for the gyro in heading hold and rate modes.

I started in rate at 25. No good. Went all the way up to 49......same problem. Then, I selected HH and started at the default 66.5 and went both up and down from there. No good. But, the already known issue of the slider drift while in HH just added to the problem. With that said, I have always preffered to fly in rate mode.....no drift. Which mode do most folks fly in and what are the most common values for each mode do folks use?

Thanks!

Huckleberry

i don't think is a good idea to reverse the gyro on the radio that will not work

[sokal]

Originally Posted by bladelearnin

i don't think is a good idea to reverse the gyro on the radio that will not work

yes it will work but will reverse the gain

0-49 will be Heading hold 0=100
51-100 is rate 100=0

[Slyster]

No.. I didn't mean reverse the gyro on the radio.. I meant reverse the RUDD (your stick) on the radio... the gyro can be set to reverse (on the gyro) and work right.. but your stick will STILL work opposite see? I think you have to do both if you put on a Hitec.

[bladelearnin]

Originally Posted by Slyster

No.. I didn't mean reverse the gyro on the radio.. I meant reverse the RUDD (your stick) on the radio... the gyro can be set to reverse (on the gyro) and work right.. but your stick will STILL work opposite see? I think you have to do both if you put on a Hitec.

I think the stock gyro is also bas ackward so you have to reverse it too

[bladelearnin]

Originally Posted by sokal

yes it will work but will reverse the gain

0-49 will be Heading hold 0=100
51-100 is rate 100=0

thats why it is better to reverse on the gyro and not tthe gyro setting in the radio

[drb99]

Have you got it yet. I have the Hitec on my bird with the stock gyro. I can look at my settings. What I remember for sure is that you have to change the reverse switch on the stock gyro itself.

Also - make sure you didn't do what I did..... I had the belt going the wrong way on the tail... even turned the rotor blades around to spin correctly.

Look at the manuals and the bible if you're not sure.

[Jasmine2501]

Originally Posted by bladelearnin

thats why it is better to reverse on the gyro and not tthe gyro setting in the radio

You MAY have to do both... you may not. Put the gyro in heading hold mode and swing the tail with your hand - the gyro should try to counteract your motion - if not, the direction on the gyro itself needs to be reversed. Then, move the rudder stick on the radio - if the blades move the wrong way, you need to reverse the rudder channel in the radio. These two things are independent - one does not affect the other, but you obviously need to have them both right. All of this is independent of the gain too - that's a whole other deal to figure out.

If the switch on your gyro is wrong, the heli will do this:
http://www.youtube.com/watch?v=txxJPu1Dn7M

[Huckleberry]

Yep.........that's what it does alright. I guess we'll have to back up a bit and try all possible combinations of the switches and see what it does. Thanks for the info.

[Heliflyer3]

try the rev / norm switch on Gyro...sounds like it is trying to comp wrong way. Question: when it spins like a bat outta hell...which direction? clockwise (right)? then its the switch...if its counter then the other guys could be on to it

[Heliflyer3]

Originally Posted by
If the switch on your gyro is wrong, the heli will do this:
[URL

http://www.youtube.com/watch?v=txxJPu1Dn7M[/URL]

Oh man I knew that was going to turn out bad...ouch

[Jasmine2501]

Originally Posted by Heliflyer3

Oh man I knew that was going to turn out bad...ouch

That video is painful to watch from the moment it becomes clear that he's not going to solve the problem by messing with the gain. There is a huge discussion in the comments, but no indication that he ever solved the problem, and no flying videos have been posted by that user.

On this setup issue though - this is not a trial-and-error, check all possible combos, kinda problem. Do exactly what I said step by step and if it doesn't work, it is defective or there is a mechanical issue with the helicopter itself. This is not hit-and-miss, it works or it doesn't.

The only confusing part about setting up the tail for me is deciding which direction the tail is pushing - it pushes toward the leading edges of the tail blades...

Sooo... if you swing the tail in "X direction" - the leading edges of the tail blades should also move "X direction" or it's backwards. I might have to do a video of this... it really is pretty easy and if it doesn't work, then it's a deeper issue than the settings.

[Slyster]

I know.. this video hurts... it is so obvious that the gyro itself is reversed... if he only knew about that little tiny switch on the side of the gyro.. Poor guy.

[Jasmine2501]

I sent him a PM - I feel really sorry for the po' liddle choppa

I just want to know if he fixed it. If you look at his profile, it says he likes "helicopter music" and "helicopter books" and I hope this problem doesn't discourage him from flying, because he clearly enjoys it.