I picked up the G90 gyro, but not having the greatest result

[slikrx]

On a whim I picked up the G90 gyro for my CPP.

I did the install/setup per the CPP instruction manual for "heading lock" (I assume that's the same as HH?). When I unplugged the main motor, and did the gyro response test, the tail sped up & slowed down properly to counter any twisting I did. When doing this, I had the knob on the TX set to 0%. (straight up)

Now, according to the manual, to the left of zero is "standard mode" and to the right is "heading lock" mode.

My problem/concer is that the best feel/response is just to the left of center (see diagram) If I turn the knob farther right (into heading lock mode), the tail rotor just spools up and stays running at high speed.
http://i48.photobucket.com/albums/f206/slikrx/gyrochannelpic.gif

I have the knob currently set like my picture shows. When I power up, or drop/recover, the tail does kick, but I assume this is because I haven't upgraded the tail yet.

Is this normal? Am I missing anything? There seems to be SOME improvement in tail holding from stock, but it doesn't feel that dramatic. :dontknow [/img]

[Buzzkill]

Wow, I have the G90 but I run it with the knob to the left just shy of all the way left (tails bounces right and left with too much gain). Sounds like it could be your motor. They act like that when there going bad.

[skylighter]

To the left of 0 like you show is in Standard Mode. This is the same mode that was part of the 3in1. You need to put it about 50% on the right side to get any real advantage from your G90. If your tail motor is going nuts like you say, then you probably have the gyro's reverse switch in the wrong direction.

Danny

[slikrx]

To the left of 0 like you show is in Standard Mode. This is the same mode that was part of the 3in1. You need to put it about 50% on the right side to get any real advantage from your G90. If your tail motor is going nuts like you say, then you probably have the gyro's reverse switch in the wrong direction.

Danny
OK, that's what I had kinda thought. I'm 99% sure I have it set he way that e-flite said to in the instructions, but I'll recheck to be sure!

I'll have to wait until I fix my tail (upgrade, to DD,) before I can check this out functionally.

Thanks!
Jeff

[livesounder]

If you follow the instructions exactly, you'll probably have your best "feel" around 2:00 o'clock on the gain control.

[Buzzkill]

Crap, I meant right not left :arggg:

[Paul Hinz]

It also is normal for the motor to spool up if the heli was moved a little because the gyro is trying to move the tail back. It will spool up faster and faster until the tail moves back.

I also ran my gain almost all the way to right like Buzzkill.

Paul

[slikrx]

It also is normal for the motor to spool up if the heli was moved a little because the gyro is trying to move the tail back. It will spool up faster and faster until the tail moves back.

I also ran my gain almost all the way to right like Buzzkill.

Paul
Unfortunately, the motor spools up without moving the heli at all. :(

Below are some pix of my setup.

http://i48.photobucket.com/albums/f206/slikrx/gyroswitches.jpghttp://i48.photobucket.com/albums/f206/slikrx/Rxconnections.jpg
http://i48.photobucket.com/albums/f206/slikrx/portside.jpg
http://i48.photobucket.com/albums/f206/slikrx/gyroplug.jpg

There is a slight tilt to the gyro. (top of it is tilting forwards)

One thing I Just caught was that I hadn't turned the proportional pot fully CCW. It was ~75% there.

I'll have to wait until I get my tail rotor fixed: either get a new shaft & bearings (lost them in a hard landing in the grass) or wait to put on the DD tail (need some parts)

[ch47dfe]

you definatly have to disable the "standard rate gyro and mixer " in the 3 n 1 by turning the proportional mix trimmer pot on the 3 n 1 to the lowest most counterclockwise postion. That allows the new G90 to have complete control over the tail.
I run my adjustment knob on the TX at about 50% gain- its at 3 0'clock position. The tail motor spins up faster because the gyro is trying to keep the nose of the heli "locked in" as you increase throttle and collective, it settles down when in a hover no problem. If I turn the gain down to where you guys have it, I find that the nose drifts at a hover and its kind of defeating the porpose of having the G90.

[dbercot]

You may already know this, but you also have to piddle with the gain knob on the top right of the TX. On a heli with a tail servo in HH mode, you would adjust the gain until the tail servo stops drifting (stays in place). Since the Blade CP has a tail motor, I haven't quite figured out how to dial it it, but it would stand to reason that you could put the TX in HH mode and dial the gain (Upper Right knob) until the tail stops spinning and leave it there forever.

If you figure it out exactly, please PM me, I mess with mine constantly.

[Buzzkill]

I set my HH gyro gain at 50% and used the knob to adjust the tail just like dbercot said above. I haven't had a problem with it at all (other than the weak stock and GWS tail motors). Even with the G90, as the pack expires you have to trim it out a bit to eliminate tail drift. Don't ask me why this is but thats what mines does. It isn't that big of a deal to me but I'll never get trex like tail hold on my CPP with a HH gyro.

[slikrx]

Thanks, guys... I haven't been feeling all that well, so I never got around to test flying it to narrow it down. I plan to disconnet the HH and go back to the stock config (but with the DD tail) and then troubleshoot from there.

After my last crash, I had to replace a blade grip and a few other things, and the head feels a little tight. The guy at my LHS said it shouldn't be a prob, so I hope to report back here in the next few days...

Thanks again!

[G-Mann]

you definatly have to disable the "standard rate gyro and mixer " in the 3 n 1 by turning the proportional mix trimmer pot on the 3 n 1 to the lowest most counterclockwise postion. That allows the new G90 to have complete control over the tail.


I have done the above where I turned the prop... mixing trimmer all the way CCW and now I have NO tail motor. I can run the throddle all the way up and NO tail rotor. If I add some prop... mixing trim then the tail motor starts to work. Is this normal or do I have a problem with something in the CPP.

Thanks Gene