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N5c head mod

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  • #1

    N5c head mod

    I was never to happy with the head block being perched at the top of the main mast, with the Jesus bolt through the first hole on my N5. There was a fair bit of movement that you had to try to stop by squeezing the block onto the mast with one M3 bolt and nylock.

    So, when I got my N5c, I decided after it was mainened and was flying well I would change the head block position and see how it felt. I bought some turn buckles from Midlands which are around 16mm shorter than standard, and then installed the head in the top hole. the head now mounts 16mm lower, so I had to reduce the length of the pitch rods from the arms to the swash. This was a bit of trial and error untill I felt the swash would sit at the right level for +-12deg, and with full cyclic and pitch, the swash is just away from the top bearing support, and the swash driver above it.

    The results are a much tighter fitting head on the main shaft, and also the heli rolls quicker and tighter. There is still bags of room between the blades and the boom, so no fear of a boom strike.





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  • #2
    Looks good, when I had mine went even further, drilled another hole higher up and made up a swash follower to fit on the head. I never liked the head height.

    MJ

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    • #3
      N5c head mod

      Nice job. Interesting to see you found it rolls quicker too.
      My interest in heli fiddling lies in modifying bits like this, and have experimented with lowering the head using standard parts and with my first trials I was surprised how even 10 mm made a stunning difference to the feel of the heli. Rolls were def quicker, but the whole heli felt more alive and "tight"
      The heli also seemed to have more power overall.
      I'm now out of interest trying the dfc head, dispite the concerns around it and it does make a substantial difference, mainly I would expect due to the overall lowering of the disc more than anything. The only thing that has stopped me going this low is the limits of the stock swash drivers.

      Wonder how long it will be before people start retrofitting the HPS head ......
      ​SWRCH , Oh.. And a Helix 700 Gasser, Hv with SK540.....with SAB HPS head.

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      • #4
        Nice job! I've had good results with the head setting on the middle hole on the N5/N5C, gives a nice all round feel.
        Thanks!
        Rossco
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        Synergy N7 / Synergy E7SE / Synergy E5
        Synergy R/C Helicopters / Rail Blades / Fast-Lad Performance Flight Team
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