Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Results 1 to 15 of 15

  1. #1
    Brainiax's Avatar
    Join Date
    Apr 2007
    Location
    Coventry, RI
    Posts
    313
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    Futaba 6EXA Elevator Gimbal Spring Failure, Almost A Disaster

    I was at my flying field yesterday when a fellow member was flying and all of a sudden the spring let go on the elevator/aileron gimball causing his plane to go out of control and slam into the spectator area. The plane hit the ground and the foot of a spectator holding a small child. The shrapnull caused minor cuts on the adult and the child was just shaken up but not hurt. This could have been a lot worse though and we're thankful it was not. It does get me thinking about my radio which is the same model. I'm getting a 7CAP instead. I don't need that happening to me. Is there a recall or are these radios notorious for this failure?? Please advise on any info or suggestions you may have as this is a serious problem. Thanks!!
    Damn Gravity Again!!!!!!!!!!!!!

  2. #2

    Join Date
    Feb 2002
    Location
    Visalia, CA
    Posts
    1,299
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Futaba 6EXA Elevator Gimbal Spring Failure, Almost A Disaster

    Your friend experienced a rare failure. I have seen this happen possibly 2-3 times in forty years of RC flying.

    A centering spring failing in a gimbal generally will not cause the plane to go out of control. Experienced pilots fly the airplane and not the stick position although the automatic centering provides a reference point. Most likely your friend panicked upon realizing the stick was not returning to center and lost control.

    Exercising the sticks on a transmitter periodically is good maintenance. Detecting anything other than normal, smooth travel warrants removing the transmitter case back and inspecting the springs and anchor points.

    Fortunately injuries were not serious.

    Dick Tristao
    ModelGrafix
    Visalia, Ca.
    559 625-3590 Home/Office
    559 280-6559 Cellular

  3. #3
    Brainiax's Avatar
    Join Date
    Apr 2007
    Location
    Coventry, RI
    Posts
    313
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Futaba 6EXA Elevator Gimbal Spring Failure, Almost A Disaster

    No, the spring let go and so did the control of the airplane. There was no elevator or aileron response at all. After asking around a little more, this may be more common than we think. At least two more incidents at other local fields in my area. Is it isolated to Futaba radios only though?
    Damn Gravity Again!!!!!!!!!!!!!

  4. #4

    Join Date
    Feb 2002
    Location
    Visalia, CA
    Posts
    1,299
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Futaba 6EXA Elevator Gimbal Spring Failure, Almost A Disaster

    Something is not right here. Just loosing the spring would not kill the aileron/elevator control.

    Did the controls respond when checking after the crash? Do they respond now?

    This could be a coincedental failure of electronics and mechanical simultaneously. If the transmitter controls work now, the loss of control is pilot error. If they don't work then a rare failure occured.

    He should send the transmitter in to Futaba for a check out.

    Failures can occur with any system, not just Futaba. Today's RC systems are extremely reliable so one brand isn't more prone to problems than others. Of course at the field level that is another argument.
    Dick Tristao
    ModelGrafix
    Visalia, Ca.
    559 625-3590 Home/Office
    559 280-6559 Cellular

  5. #5
    Brainiax's Avatar
    Join Date
    Apr 2007
    Location
    Coventry, RI
    Posts
    313
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Futaba 6EXA Elevator Gimbal Spring Failure, Almost A Disaster


    ORIGINAL: Dick T.

    Something is not right here. Just loosing the spring would not kill the aileron/elevator control.

    Did the controls respond when checking after the crash? Do they respond now?

    This could be a coincedental failure of electronics and mechanical simultaneously. If the transmitter controls work now, the loss of control is pilot error. If they don't work then a rare failure occured.

    He should send the transmitter in to Futaba for a check out.

    Failures can occur with any system, not just Futaba. Today's RC systems are extremely reliable so one brand isn't more prone to problems than others. Of course at the field level that is another argument.
    Dick, all we have to go by is the pilots recolection as the plane was destroyed and the radio confiscated by the police. There were minor injuries involved so an accident report was made. It was a scary experience. If you saw how close this was, you would agree. I'd like to see for myself too whether or not it was just the transmitter spring. Perhaps he'll get it back and we can check. I just ordered a new 7CAP radio and from what I have been able to see, no incidents with this radio.
    Damn Gravity Again!!!!!!!!!!!!!

  6. #6

    Join Date
    Dec 2001
    Location
    Waseca, MN
    Posts
    8,451
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Futaba 6EXA Elevator Gimbal Spring Failure, Almost A Disaster

    As far as I know, the springs only function is to provide tension in the stick. Ie making it stiffer or looser. I don't think it does anything else.

    I had a coupe 6ex radios when I first started 10 years ago. Never had an issue, and never heard of that happening. I'd say its isolated.
    Dave Norman
    29w

  7. #7

    Join Date
    Feb 2002
    Location
    Visalia, CA
    Posts
    1,299
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Futaba 6EXA Elevator Gimbal Spring Failure, Almost A Disaster

    I'm sure he will get it back and you guys can check it. Let everyone know what the result is.

    Again, thankfully there were no serious injuries.

    As mentioned in the above post, it was an isolated incident.
    Dick Tristao
    ModelGrafix
    Visalia, Ca.
    559 625-3590 Home/Office
    559 280-6559 Cellular

  8. #8

    Join Date
    Jan 2007
    Location
    , GERMANY
    Posts
    184
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Futaba 6EXA Elevator Gimbal Spring Failure, Almost A Disaster

    A spring will have a hard time getting loose in exactly a way which shorts the 2 stick pots at exactly the same time.
    It is, however, possible that more than just the spring failed.
    If a major part of the gimbal broke away, it is possible that the centering force and the stick connection to the pots was lost at the same time.

  9. #9
    Brainiax's Avatar
    Join Date
    Apr 2007
    Location
    Coventry, RI
    Posts
    313
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Futaba 6EXA Elevator Gimbal Spring Failure, Almost A Disaster

    Thanks for the posts guy's. I'm glad the consensus is isolated incident. I sure don't want to worry about that while I'm trying to concentrate on flying. I will report any new findings for sure! Btw, anyone interested in a 6EXA radio?? (not his, mine)......
    Damn Gravity Again!!!!!!!!!!!!!

  10. #10
    MetallicaJunkie's Avatar
    Join Date
    Sep 2006
    Location
    Donna, TX
    Posts
    5,429
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Futaba 6EXA Elevator Gimbal Spring Failure, Almost A Disaster

    this happened to me once in my lifetime on my jr 10x less than a year ago... it was scary. The aileron spring broke.... the plane(LA Racer) came out ok, heck i even flew it again like that.
    \"Propellers are notorious for inflicting serious bodily harm while vigorously defending their space\" George Aldrich

  11. #11

    Join Date
    Mar 2006
    Location
    Niangua, MO
    Posts
    23
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Futaba 6EXA Elevator Gimbal Spring Failure, Almost A Disaster

    The same thing happend to me the other day the tab on cam that the spring pulls broke

  12. #12

    Join Date
    Oct 2005
    Location
    Lloydminster, AB, CANADA
    Posts
    121
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Futaba 6EXA Elevator Gimbal Spring Failure, Almost A Disaster

    I'll chime in with a similar incident on a 6EXA . I was helping a friend build a trainer in my shop , i was bored one afternoon and decided to set up his control surfaces so that part would be done when he returned , and we could move on with the build . I grabbed the transmitter and when i moved the left gimbal for throttle , it had resistance and limited travel at half way . I pulled off the back plate to see if something was stuck in there , and couldn't see anything . Not wanting to probe into his radio any further , i put it back together and called him to let him know what happened . He took the radio to a friend of his that is used to working on electronics , and upon full disassembly it was found that the spring had come off the post and was causing the binding . The radio was repaired and we have since flown with it with no problems . I had never experienced , nor heard about this happening , but it seems others have had a similar issue . Luckily it happened to us while in the shop and not while flying .

  13. #13

    Join Date
    Jul 2002
    Location
    Auckland, NEW ZEALAND
    Posts
    2,582
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Futaba 6EXA Elevator Gimbal Spring Failure, Almost A Disaster


    ORIGINAL: Brainiax I was at my flying field yesterday when a fellow member was flying and all of a sudden the spring let go on the elevator/aileron gimball causing his plane to go out of control and slam into the spectator area. The plane hit the ground and the foot of a spectator holding a small child. The shrapnull caused minor cuts on the adult and the child was just shaken up but not hurt. This could have been a lot worse though and we're thankful it was not. It does get me thinking about my radio which is the same model. I'm getting a 7CAP instead. I don't need that happening to me. Is there a recall or are these radios notorious for this failure?? Please advise on any info or suggestions you may have as this is a serious problem. Thanks!!
    A known problem with the 6EXA, refer
    Faulty equipment not my fault.
    Regards
    Alan T.
    Alan's Hobby, Model & RC FAQ Web Links
    R/C hobby consultant for various companies

  14. #14

    Join Date
    Jun 2006
    Location
    Miramar, FL
    Posts
    947
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Futaba 6EXA Elevator Gimbal Spring Failure, Almost A Disaster

    Alan,

    I think they are talking about the Futaba 6 channel, not the Tower Hobbies 6 channel.

    Doug.

  15. #15

    Join Date
    Jul 2002
    Location
    Auckland, NEW ZEALAND
    Posts
    2,582
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Futaba 6EXA Elevator Gimbal Spring Failure, Almost A Disaster

    What is the difference? just a marketing brand label.
    Did you refer to:
    http://www.rcuniverse.com/forum/m_79...anchor/tm.htm# post #6?

    Alan
    R/C hobby consultant for various companies


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 06:31 PM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.