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HelicopterAlignOther › Maiden Flt - Pro #2: Weebles Wobble & Insane Piro Rate
11-27-2007 11:40 PM  9 years agoPost 1
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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Wooo Hoooo - I finally got the maiden flight in after having to wait 3 weeks for my CY Solid-G gyro to come back from the warranty work!

Pretty much an uneventfull maiden - which is always a good thing since nothing went wrong!

With the engine rich, a benign throttle curve, and the hard 90 Align dampners, it wobbled like an fn weeble! Maybe not as bad as a Kasama headed Raptor, but she wobbled. We checked the headspeed, and it was an even 1500! Well he!! no wonder it wobbled! We leaned it out a bit, and adjusted the curves, and got the headspeed to 1700 by the end of the first tank. Looked better.

In the second flight I checked the piro rates of my new gyro. The left rate was fast, but acceptable. The right rate was absolutely insane! I didn't think a 50 size heli could spin that fast! To me, this rate is actually unacceptable (and unusable).

Does anyone know how to slow it down, and what value to set this rate to to be more "normal"???

Anyway, this was one of my best builds and my best maiden flight ever!

Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know

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11-28-2007 12:49 AM  9 years agoPost 2
duceduc

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Saitama-Ken, Japan

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Goto your atv menu and set both the left and right value on the rudder channel below the value it has now.

Duc S
Do It! Do It!™
AMA:REVOMIX
RCK:24005615-01

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11-28-2007 01:00 AM  9 years agoPost 3
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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I'm sure this would slow it down some, but not much.

Think of a Trex 450 on crack - that is what I saw today!

For the Solid-G, there are some advanced menus with several parameters that control piro rate (left & right).

What I'm looking for is specifically what parameter should I change, and what value should I change it to...

Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know

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11-28-2007 01:03 AM  9 years agoPost 4
baddynergy

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sierra madre, ca- usa

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PM BuzzinBrian from CY. He is pretty quick to respond. And that Piro was gear stripping fast. And stopped so hard it bogged the motor.

**Unattended children will be givin a shot of espresso and a puppy**

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11-28-2007 01:09 AM  9 years agoPost 5
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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Thanks dude, I'll do that..............

Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know

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11-28-2007 02:09 AM  9 years agoPost 6
fiveoboy01

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Waunakee, WI - USA

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What transmitter are you using?

If it's like just about every gyro, you can go into the rudder ATV/Travel limit and adjust the endpoints. If they're at 100%, you can turn them down - try 85% and see if that changes the piro rate.

I'm not sure about all gyros, but on my 401 for my trex 450 I have different numbers for left and right due to main rotor torque making it spin one way easier. Not sure about the solid-g on that though.

Just play with the numbers until you get the spin you want.

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11-28-2007 05:16 AM  9 years agoPost 7
PilotCK

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Scottsdale, AZ

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Rockohaulic,

Your bird looks VERY clean I like the wire set up!

~Team Collective Mayhem

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11-28-2007 06:26 AM  9 years agoPost 8
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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Thank you very much dude!

Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know

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11-28-2007 07:19 AM  9 years agoPost 9
fiveoboy01

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Waunakee, WI - USA

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Nice setup on the wire routing, nice and neat.

How come you're missing a bunch of the aluminum washers? Did you purposefully leave them off?

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11-28-2007 05:47 PM  9 years agoPost 10
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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Thank you!

Yep, I left them off. They are not even used at the important spots like the bearing blocks...

Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know

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11-28-2007 06:58 PM  9 years agoPost 11
Ghostrider

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San Diego, CA

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There are videos on CY's website that explains each menu and what it does. I don't have that gyro but I watched the video's and it looks pretty detailed.

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11-28-2007 10:12 PM  9 years agoPost 12
Ralphw

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Spring, TX

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Mike (Inkspot1967) posted a fix back in October to the crazy piro rates this gyro is capable of, and I've quoted it below...
Inkspot1967 wrote:

expo fix on solid-g

What you will adjust is the Expo Width, a higher number will make it less sensitive around center and obviously a lower number will make it more sensitive.

this is changed in the parameter menu
again you will need a g-view to get into the parameters
This was in addition to reducing the ATV setting on the rudder from 130% to 100%. I tried the same settings with a similar result..a piro rate I could ALMOST count !!

Ralph W.
"Life's Short, Fly Fast"

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11-29-2007 12:09 AM  9 years agoPost 13
Rockohaulic

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Canyon Country, CA, USA, 3rd Rock from the Sun

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Thanks Ralph. I got off the phone with Brian at CY Enterprises, and he set me straight on several things I need to change.

Did you guys notice it was my RIGHT (Clockwise) piro rate that was insane? It didn't even occur to me on Sunday that this was the direction fighting the torque from the main blades! So I am changing some parameters and some mechanical settings to even this rate out and slow it down.

Thanks Brian!!!

Saturday morning I flew my helicopter in my pajamas
How it got in my pajamas I'll never know

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