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HelicopterRadio - Servo - Gyro - Gov - Batt › Gettin annoyed. Tail wag on nitro birds
09-02-2009 11:13 PM  8 years agoPost 1
popiterflyer

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Va

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Ok so I flew electrics and just went to nitro. I can't seem to get this tail to hold right. It wags in a hover and it shudders when I load it(flips ect). Two different birds same issue. Any suggestiuons? Gain is around 68 and its inertia gyros. Thanks

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09-02-2009 11:20 PM  8 years agoPost 2
Blade_Master1

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Canada

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is your fuel mixture to rich ?
does the head bog down just before the tail lets go ?
also do you have adequate vibration padding (double sided foam)

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09-03-2009 01:12 AM  8 years agoPost 3
Mike Fortin

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USA

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Your gain is way to high, you should not be any higher than 37 on the gain.

Have Rotors, Will Fly!

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09-03-2009 01:34 AM  8 years agoPost 4
TankDirt

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Illinois

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you should not be any higher than 37 on the gain
That depends on ALOT of things....My vote goes for your gyro mounting, what tape did you use and where are the gyros mounted?

Try some Spartan gyro tape, its about 4 bucks for a few squares. Should take care of your issues. Also make sure the tail pushrod can move nice and free without the servo connected.

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09-03-2009 02:21 AM  8 years agoPost 5
Blade_Master1

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Canada

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that raises a few more questions
what radio are you using ?
are you using the gyro menu or Gear ATV ?

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09-03-2009 02:23 AM  8 years agoPost 6
Kevin Dalrymple

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Indianapolis

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Hey Mike Fortin Dont you own / distribute the Inertia 860?

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09-03-2009 02:29 AM  8 years agoPost 7
popiterflyer

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Va

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Radio is jr 9303 using a 921 receiver and the gyro menu. I used the foam mounting tape. It wags about 1-2 in in a hover and like I said. If I flip it the tail really shudders throughout the flip.

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09-03-2009 03:06 AM  8 years agoPost 8
Inertia RC

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Melbourne, FL USA

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The tape that comes with the Inertia gyros is the best tape I have ever used in 6 years as a pilot. It's a tape we found from 3M, it's not cheap but it's hands down awesome.

As for the wag, there are 3 things to look at.

1. Gain - anything over 37 is way to high and causes the servo to work 50% harder and thus shortening the service life of the tail servo. I have not known anyone to use a gain higher than 38 on a nitro machine.

2. The mounting location of the gyro between the frames may not be the best. Unless you have about 3mm of clearance on each side of the gyro it could be moving in flight and hitting the side frames.

On the velocity machine it seems like a very tight fit between those 2 pieces of the frame. At the same time I don't think those pieces of the frame that "shield" the gyro add any strength to the frames at all.

3. Tuning, Tuning, Tuning.

www.InertiaRC.com
Innovative by Design, Affordable by Choice!

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09-03-2009 02:48 PM  8 years agoPost 9
JohnThompson

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Chesapeake, VA

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Mike...Is that 37 ATV menu or 37 Gyro menu? There is some calculation to get between the two menus but I don't remember it.

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09-03-2009 02:49 PM  8 years agoPost 10
popiterflyer

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Va

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good question

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09-03-2009 03:08 PM  8 years agoPost 11
Inertia RC

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Melbourne, FL USA

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On the Spektrum/JR radio I typically just use the ATV's to control the gain. The true number there is 37 as I keep the gain on the gyro at 100.

If your using the gyro sensativity menu on the JR/Spektrum radios there is also a bit of a difference in the numbers.

If your using Futaba this differs as the numbers are a bit different for the gain.

It's also very important to make sure that your tail is properly setup in order to get the best performance from any gyro.

www.InertiaRC.com
Innovative by Design, Affordable by Choice!

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09-04-2009 08:29 PM  8 years agoPost 12
rox33

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Norway

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I had the same happening with my csm720 when I mounted the gyro with a soft gel like gyrotape..
Fixed it by changing to a firmer tape....

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09-05-2009 02:49 AM  8 years agoPost 13
JohnThompson

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Chesapeake, VA

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If you use a soft tape like zeal, use a tight strap to hold it down firm.

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09-05-2009 04:52 AM  8 years agoPost 14
popiterflyer

rrApprentice

Va

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Or you could just put the paddles on right. I realized I had the kandb paddles one in the front hole and one on the back. Oops. Just wanted to make sure you guys were on the ball!

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09-08-2009 06:50 PM  8 years agoPost 15
Inertia RC

rrNovice

Melbourne, FL USA

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Glad you got it all worked out, little things like that will always get you!

How is everything working for you now?

www.InertiaRC.com
Innovative by Design, Affordable by Choice!

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09-08-2009 07:48 PM  8 years agoPost 16
popiterflyer

rrApprentice

Va

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Seems to be good. Still a little shudder in flips. But I went over the tail and there are 2 bearings in the tail lever that had a ton of play. So I ordered them today.

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HelicopterRadio - Servo - Gyro - Gov - Batt › Gettin annoyed. Tail wag on nitro birds
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