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Awful Mornings Flying, But a couple of lessons learned....

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  • Awful Mornings Flying, But a couple of lessons learned....

    Perfectly still morning and field to myself what could go wrong?

    Spooled up my TRex 500 and just about the point where the soft start had finished ramping up to 75% throttle and BANG! both rotor blades fly off. My instincts for hitting throttle hold must be getting better as I hit it without thinking and fortunately my heli stayed on its feet but I'm still looking at a new canopy, fly bar and paddles. Looking at the blades they failed at the mounting hole.

    The blades where recently fitted and came with the heli (bought seconds hand), looking them up today they appear to be cheapo blades from HK (HobbyKing R/C Hobby Store : 430mm Fiber Glass Main Blades). The second pair I have are going in the bin, I spend more than these cost on blades for my MCPx and 250.

    Lesson learned, don't fly a TRex 500 with £5 rotor blades and lookup what you are fitting if you didn't buy them.



    Pulled out my TRex 250 and flew a couple of batteries no problems, then I lost the radio link to the heli and it fell out of the sky. Ripped of the skids and battery tray, but every thing else looks OK. Interesting thing is I lost the link at the same place at the field doing the same basic manoeuvre at about the same height with the 500 about two weeks ago (hence the change of blade). I blamed this on the ESC and replaced it, but it looks like the radio is the problem. I did some range checks at the field with both heli's and both loose signal at about the same point. Using the range check feature on the Dx6i and I loose signal at around 20 paces, the manual suggests this shouldn't happen until at least 30 paces. I'll be calling Horizon on Tuesday.

    Lesson learned, the range check feature on the radio is not just for decoration, use it!


    Sharing my misfortune so hopefully somebody else will read it and learn without denting their heli or bank account.

  • #2
    Cheap blades and high headspeeds don't mix. Were they woods, fibreglass or cf? After what you've said I'll stick to genuine Align or fair priced ones.

    As to your range, could be the radio, could be you're in the beam of something like radar or some new moo-cow secret weapon

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    • #3
      Ouch! sorry to hear about that. I have seen a cheap blade rip out of the grip on a 450 Sport. I think it was a glass fibre blade. Only one blade came off and the resulting imbalance bent the main shaft about 45 degrees.

      A good pair of inexpensive CF blades for the 500 are the unbranded black ones choppaholic was selling a while back. I have a pair and they flew very well but I'm using Maverikk G5s now with a BeastX. Also the Align 425Ds you can get '2nds' which have some kind of cosmetic blemish but quite honestly I have never been able to tell. £21.98 from Align Trex.co.uk they fly very similar to the black carbons, maybe just a tiny tiny bit heavier.
      Kasama, Minicopter, Henseleit, JR, Shape, Beam
      Robbe, RMJ Raptor gasser, powered by
      Spartan, Spirit, BeastX, Kontronik, CY Total-G, DX8

      member of Epsom Downs and Bloobird clubs
      Proud recipient of 7 EGS! and a platinum star

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      • #4
        The cheapo blades were fibre glass, about to order a set of Align 425D's

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        • #5
          Originally posted by DaveJones View Post

          Lesson learned, the range check feature on the radio is not just for decoration, use it!
          The lesson I would learn from that would be to use a more reliable radio system, such as Futaba.
          Life's a bitch and then you fly!!
          -----------------------------------------
          T-Rex 450 Pro, GP780, R6106hfc
          T-Rex 500 esp, Quark, R6106hfc - For Sale
          T-Rex 600 LE, Metal Quark, OS55, A395, R6008hs, Multigov Pro
          T-Rex 700LE FBL, OS91H, CGY750, BLS451s, BLS251
          SRIMOK 90N cyber conversion, YS91SRS, CGY750, Radix, BLS352s, BLS251
          8FG - Now with 14 channels!

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          • #6
            Align trex has quality seconds which are a few pounds cheaper than perfect ones. Usually it is just a mark on the blade which comes off with soap and water! Not cheap as cheapo blades, but atleast you know they wont do what yours did

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            • #7
              Sorry to hear about your bad luck. I am going to put another post up when I get a chance about align blades as have had a problem myself recently.

              I have been working on my heli so had the blades off. Friday night went to put back on ready for the weekend and found the bolt holes starting to pull through the root of the blades. Ill upload some pics. These are align 425 blades on a trex 500 efl pro with about 50 flights on them. Headspeed im not sure but standard align motor / esc with 75% normal and 80 % idle so not working that hard. Mainly sport flying and only starting to learn a bit of 3D.

              One blade is worse than the other but both are showing signs of the bolt pulling through. These blades have had nothing touch them other than paper towel to clean them and air. Never touched the ground and never even had a hard landing.

              Cheers
              Blade 1.JPG Blade 2.jpg




              Goblin 700, Vbar Silverline, Savox SC-1267MG / SB-2272MG.Scorpion opto 130. Align 750mx /450kv
              Trex 500 EFL Pro, DFC, Vbar 5.3 Full Pro.
              CopterX 250 SE FBL, With Align upgrades and 3GX
              JR XG 7
              Mini CP, Heading for retirement.

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