You must Sign-in or Register to post messages in the Hobby Squawk community
Registration is FREE and only takes a few moments

Register now

Announcement

Collapse
No announcement yet.

Version 8 FMS Mustang Electrical mystery

Collapse
X
Collapse
First Prev Next Last
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Version 8 FMS Mustang Electrical mystery

    I finally broke down and purchased a V8 Mustang from ForceRC. They had the gunfighter schemed mustang on sell for quite awhile and they put a August sell code out so I got 30 bucks off the sell price. Anyway who cares about that. This is the problem. Now I emailed forcerc and will try to get with them tomorrow to figure it out, but I thought i would see what anyone here thinks. The right wing is dead electrically speaking (pilot cockpit view right). List of my trouble shooting
    1. Plugged the wing connector in to both ports on board, tried them one at a time in different ports etc.
    2. Had brand new board and wing connectors. So, swapped out wing connector that did not work. Swapped our board. That did not work.
    3. Tried different receiver, reset radio, re binded, none of that worked.
    4.Disconnected aileron from wing connector. Plugged aileron directly into a receiver that was powered with a receiver pack. It worked.
    5. Reset radio channel to default, re binded, tried different channels, a different receiver, still no joy.

    When I say dead, I mean no aileron, flap, light or gear. I mean it is electrically dead.

    Now at a glance you would thing oh its the connection board or wing connector. But I had a brand new board and wing connectors and swapped them out and still had no result. So, I am thinking that having two bad boards or three bad wing connectors is probably not the issue either. Actually the board was already proven to be good by virtue of plugging the wing connectors in to different ports with same result.

    Could a ESC cause this? Its the only thing i did not do anything with

    My equipment is
    Spektrum DX9 radio
    Spektrum DSMX ar7010 with satellite
    Speltrum AR600 sport receiver(used it for trouble shooting and to verify if it was the 7010 receiver. Same result so I am thinking it was not the receiver)

  • #2
    Ben,
    You didn't indicate whether you were seeing any control from your elevator and rudder. If the BEC on the ESC is acting up, because it is providing the Vc to the Rx it is going to affect ALL Rx controls.
    Since the Gunfighter is a discontinued airframe, maybe you got one of the early (Diamond)ForceRC older dusted off inventory(guessing they don't have FIFO inventory control) that had the older version multi-wing connector. They had a known intermittent issue with the common ground that is why the newer version on a plywood base came around.
    From the connectors referenced below, which one do you have?
    Older connector:

    Newer connector:
    Warbird Charlie
    HSD Skyraider FlightLine OV-10 FMS 1400: P-40B, P-51, F4U, F6F, T-28, P-40E, Pitts, 1700 F4U & F7F, FOX glider Freewing A-6, T-33, P-51 Dynam ME-262, Waco TF Giant P-47; ESM F7F-3 LX PBJ-1 EFL CZ T-28, C-150, 1500 P-51 & FW-190

    Comment


    • #3
      Originally posted by OV10 View Post
      Ben,
      You didn't indicate whether you were seeing any control from your elevator and rudder. If the BEC on the ESC is acting up, because it is providing the Vc to the Rx it is going to affect ALL Rx controls.
      Since the Gunfighter is a discontinued airframe, maybe you got one of the early (Diamond)ForceRC older dusted off inventory(guessing they don't have FIFO inventory control) that had the older version multi-wing connector. They had a known intermittent issue with the common ground that is why the newer version on a plywood base came around.
      From the connectors referenced below, which one do you have?
      Older connector:

      Newer connector:
      https://www.motionrc.com/products/fm...ctor-fmmcon001
      It is a version 8 with the plywood board connector. I had a brand new board still in the package and new connectors. I tried those as well with no joy. Yes I am getting everything but the right side wing. You are probably right it is a grounding issue

      Comment


      • #4
        Try this: disconnect the connector for the lights from the wing connector, and measure back to the RX with an Ohmmeter on both the ground and power contacts. If one fails, separate the wing connector from the board, and measure just it, and compare to the working side, to determine which board contacts are power and which are ground. If you find the cables match, then try the power and ground contacts on the board back to the RX. Passing all that, get a very bright lamp and a good magnifier, and peer into the female contacts, looking for any differences; it is not uncommon for the spring contact to collapse or push back in these small contacts.

        Comment


        • #5
          Mystery solved. The polarity was wrong from the "factory". I knew it was something dumb an easy I kept overlooking

          Comment

          Working...
          X