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Trex 700X owners.. Please read

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  • Trex 700X owners.. Please read

    Just a quick 'heads up' for 700X owners.

    The tail pushrod supplied with the kit is a little too short which leaves only about three turns of thread engaged in the plastic ball links and they can pull out in flight. It's easy to miss because the first part of the bore of the link is un-threaded, so it seems at first that there is enough thread inserted until you realise that most of what's inserted does nothing. The root of the problem is that the new 700X frame move the servo forward slightly compared to previous models. A longer pushrod was intended and the manual states that the pushrod should be 766mm long, but the actual rod supplied is the one from the 'old' 700L/700e which is 760mm long.

    There are two ways to fix the problem. You can heat the threaded part of the pushrod with a soldering iron, pull out the threaded part when the glue goes soft, then epoxy it back but sticking out an extra 6mm (it's easily long enough), or do it at both ends by 3mm if symmetry is important to you. Alternatively just use a Quick UK 22mm long links to replace the Align ones.

    Luckily i picked it up during the build. Some guys have flown their 700X's with the stock pushrod an got away with it.. but some havent been so lucky:
    Goblin Kraken, SoXos Strike 7, XLPower Specter, Goblin Black Thunder T, Goblin 700 Speed, Goblin 770 Comp Carbon, Trex 700X, Kasama Dune, Henseleit TDR

  • #2
    Poor effort on Align's part tbh but sorted mine with the Rocket city link during the build. 3 threads is never going to be enough!

    MJ

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    • #3
      would these be the ones
      Quick UK Retail - shop-products
      mark
      3x700s none mine

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      • #4
        Originally posted by raptormark View Post
        would these be the ones
        Quick UK Retail - shop-products
        Don't think these work with the align balls.
        T- rex 600n V-bar
        Logo 550sx V-bar
        Logo 600sx V-bar
        Logo 600sx V-bar night flyer

        VBControl, but not the gay white version as i'm simply not gay enough to pull it off!

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        • #5
          Originally posted by raptormark View Post
          would these be the ones
          Quick UK Retail - shop-products
          Yes, those will do it. They are a very tight fit on the balls, so would need reaming, but that's normal.

          t's a five minute job to remove and re-set the threaded rod in the end up the pushrod if you decided to take that option instead.
          Goblin Kraken, SoXos Strike 7, XLPower Specter, Goblin Black Thunder T, Goblin 700 Speed, Goblin 770 Comp Carbon, Trex 700X, Kasama Dune, Henseleit TDR

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          • #6
            Those are the ones you can ream it or use a Quick UK ball with it. I used the Quick 22mm link and ball.

            MJ

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            • #7
              i did the grumpy mod to my push rod , it was quick and very easy to do and at no extra cost. thanks grumpy!

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              • #8
                Grumpy's looks a great solution.

                MJ

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                • #9
                  Hey All.

                  This isn't limited to the 700X it's been around since the first 700E's and I've fitted Rocket City (Quick) plastic links to all my tail pushrods, just to give it those extra threads.

                  No sure why Align haven't added the 4 - 5mm to the tail pushrod over the years.

                  Ian
                  Ian Contessa
                  Robbe SchluterUK / Midland Helicopters / Align



                  Coolice Power Supplies
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