RunRyder RC
 1  Topic Subscribe
WATCH
 1 page 432 views POST REPLY
HelicopterRadio - Servo - Gyro - Gov - Batt › Bizarre 401 problem
10-20-2009 06:09 PM  8 years agoPost 1
Smithprod

rrVeteran

Oklahoma

My Posts: All  Forum  Topic

Okay, this is baffling me. I have a JR Airskipper converted to electric with a new 401/9254 combo. The ship is glass smooth and the tail holds perfect but I have an intermittent jitter. I can hover the ship directly in front of me and watch the servo arm jitter about two-three millimeters and see it in the tail, sometimes violently.

What's weird is I can run it up on the ground without pitch, drawing about 11 amps, and cannot make it happen, tail is just rock solid. Then I can lift off, drawing about 23 amps, and there comes the problem.

Thinking this is some type of electrical interference, I moved the 401 from the front of the ship to the back and rerouted the wires but no luck. Next I swapped the 9254 and still have the problem. I'm going to shotgun the 401 now but thought I would post to see if anyone had seen anything similar. Any ideas??

Thanks
Brad

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-20-2009 07:20 PM  8 years agoPost 2
RadioRob

rrVeteran

Schaumburg Illinois USA

My Posts: All  Forum  Topic

Are you using a separate BEC? If not it sounds like the Gyro is not getting enough juice to function correctly.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-20-2009 07:22 PM  8 years agoPost 3
Smithprod

rrVeteran

Oklahoma

My Posts: All  Forum  Topic

No BEC, running off of a strong 2100mAh 4.8 pack.

Thanks!

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-20-2009 10:28 PM  8 years agoPost 4
Silvashadow

rrVeteran

Kent, UK

My Posts: All  Forum  Topic

Tail belt static possibly?? Could be that on the ground any static is being disipated. Just a thought

PM  EMAIL  GALLERY  Attn:RR  Quote
10-21-2009 01:59 AM  8 years agoPost 5
dkshema

rrMaster

Cedar Rapids, IA

My Posts: All  Forum  Topic

What radio system are you using.

Let me understand, this was a nitro heli, worked fine, then you switched it over to electric power, and now you see the problem. Is that correct?

Motor is powered by your LiPo battery through the ESC, and you are using a separate NiMh battery pack to run the receiver and servos. Is that correct? If so, are the two battery ground signals tied together (other than through the receiver's internal ground bus simply because you have the battery and ESC throttle control plugged into that common bus.

It would be odd for the gyro and servo to suddenly "go bad" simply because you changed power systems. Likewise, it would be odd for the gyro to start acting weird due to "static electricity" as you didn't change the mechanics of how the tail is driven.

I'd suspect electrical noise making its way into the receiver, most likely being conducted from the ESC into the throttle channel of the RX. If you don't have a ferrite toroid installed on the ESC to RX cable, consider doing so. You also might consider using a toroid on the Gyro to RX leads as well.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

PM  EMAIL  GALLERY  Attn:RR  Quote
10-23-2009 03:17 AM  8 years agoPost 6
Smithprod

rrVeteran

Oklahoma

My Posts: All  Forum  Topic

Guys, turned out it was a bad 401 new out of the box. Swapped in another and problem solved. Thanks for everyone's suggestions!

Brad

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-29-2009 09:29 PM  8 years agoPost 7
Rogman88

rrElite Veteran

West Monroe, LA

My Posts: All  Forum  Topic

I too have had a similar issue but have crashed the heli many times. I think the last crash may have done it. Intermittent tail bump to the right (nose to left) I have another 401 on the way. We'll see if that fixs it.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
WATCH
 1 page 432 views POST REPLY
HelicopterRadio - Servo - Gyro - Gov - Batt › Bizarre 401 problem
 Print TOPIC  Make Suggestion 

 1  Topic Subscribe

Sunday, January 21 - 6:45 pm - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online