RunRyder RC
 3  Topic Subscribe
WATCH
 1 page 748 views POST REPLY
HelicopterFlybarless Rotor Head SystemsSpektrum › AR 7200BX Throttle not working
06-22-2015 02:07 PM  35 months agoPost 1
rich afflerback

rrApprentice

willingboro nj

My Posts: All  Forum  Topic

Anyone have the throttle port of a AR7200BX stop working. Went out to fly my NX4 and couldn't get the engine running. Played with it at the house and that's when I noticed the throttle servo was pinned to one side. Unplugged the servo and tried it in another port and it works fine. Plugged a different servo into the throttle port and nothing.

PM  EMAIL  GALLERY  Attn:RR  Quote
06-22-2015 02:18 PM  35 months agoPost 2
grim.the.grim

rrVeteran

Houston, Texas

My Posts: All  Forum  Topic

I had this exact issue on a used 700 I purchased. Intermittently the throttle would not respond when I powered the Heli and it would get pinned to one side. I couldn't figure it out. What I noticed was that the prior owner had installed a tail servo on the throttle. So I swapped it out with a servo that matched the pulse and frequency of the other servos. Don't know if that was the fix, but it has not had a problem since. I figure since the pulse and frequency is sent for both tail and cyclic, having the wrong setting could be an issue.

As I mentioned, the cause and effect on that just be a coincidence, but I have not had that issue since getting a matching servo on the throttle.

*** Real Pilots BEAT the air into submission! ***

PM  EMAIL  GALLERY  Attn:RR  Quote
06-22-2015 02:25 PM  35 months agoPost 3
rich afflerback

rrApprentice

willingboro nj

My Posts: All  Forum  Topic

I don't have the heli in front of me but I think the servo is the same as the ones on the head. I'll have to check into that. Its weird I flew the heli a couple of weeks ago and then the second flight couldn't make it run. Took it home and blew threw the carb cause I thought something was caught in the needle and it ran at the house. Put it away and now it wont run again and that's when I find the throttle servo problem.

PM  EMAIL  GALLERY  Attn:RR  Quote
06-23-2015 10:00 PM  35 months agoPost 4
grim.the.grim

rrVeteran

Houston, Texas

My Posts: All  Forum  Topic

Did you check the servo? Was it the same? As I mentioned before, the cause and effect I referred to might not be your issue but it was mine. My servo was also intermittent as far as having the hard over. I would have to turn on and off the receiver several several times for it to stop , until I noticed a tail servo was being used. Let me know what you find out. I'm curious.

*** Real Pilots BEAT the air into submission! ***

PM  EMAIL  GALLERY  Attn:RR  Quote
06-24-2015 02:22 PM  35 months agoPost 5
rich afflerback

rrApprentice

willingboro nj

My Posts: All  Forum  Topic

My issue turned out to be trying to initialize the beast with the throttle trim where it needed to be for an idle. Something about that was tripping the failsafe

PM  EMAIL  GALLERY  Attn:RR  Quote
06-26-2015 01:27 AM  35 months agoPost 6
grim.the.grim

rrVeteran

Houston, Texas

My Posts: All  Forum  Topic

Explain, explain...please

*** Real Pilots BEAT the air into submission! ***

PM  EMAIL  GALLERY  Attn:RR  Quote
06-26-2015 02:11 AM  35 months agoPost 7
dkshema

rrMaster

Cedar Rapids, IA

My Posts: All  Forum  Topic

Unique SmartSafe Functionality of AR7200BX

The AR7200BX features a unique SmartSafeâ„¢ failsafe function that operates in the following manner:

During power up and before the RF connection, no output pulses are present on the throttle. The ESC will not arm.

• When the RF connection is made between the transmitter and receiver, the throttle servo output pulse is driven to the bound failsafe position (normally low throttle) regardless of the throttle stick position. The output pulse remains at the bound failsafe position until the throttle stick is returned to low throttle. At this point the ESC is armed, however, the receiver is “locked” at low throttle.

• When you move the throttle stick to the low position, the system allows normal throttle control of the throttle output pulses.

This feature was developed to prevent the throttle from returning to a high throttle position (idle up active) after a brown out, as the cyclic servos will not recover until re-initialization.
Though it talks about ESC's, the RX doesn't KNOW what the source of power happens to be. Gotta be at low throttle to allow the throttle servo to be unleashed.

-----
Dave

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

Team Heliproz

PM  EMAIL  GALLERY  Attn:RR  Quote
06-26-2015 02:31 AM  35 months agoPost 8
grim.the.grim

rrVeteran

Houston, Texas

My Posts: All  Forum  Topic

Sweet Info! Thanks!!!!

*** Real Pilots BEAT the air into submission! ***

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 748 views POST REPLY
HelicopterFlybarless Rotor Head SystemsSpektrum › AR 7200BX Throttle not working
 Print TOPIC  Make Suggestion 

 3  Topic Subscribe

Friday, May 25 - 8:25 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online