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  • Head speed?

    hi everybody ... I've been flying my trex600 with no governor (using program mix on my DX7). I'm now installing a governor (revlock 20). So I'm just wondering which head speeds should I start with? At the moment I'm starting into the 3D world (inverted flights, inverted circuits, frustrated attempts of tic-tocs, etc).

    I was planning to start with something like:

    Normal: disabled
    Idle1: 2000
    Idle2: 2100

    Is that a good start point? Too low/high?

    I appreciate any help.

    cheers.
    T-rex 700 N
    T-Rex 600N Pro
    T-rex 600 NSP
    T-Rex 450 Pro (Cool!)
    Blade mCX
    DX7

  • #2
    2100 or 2050 for 3D. The 17,000 max power point on the hyper is about there. The idea is to set it so it pulls down onto the max power band.

    I have about 1800 and about 2100.

    i did this without a programmable mix by using sub trim on ch7. ch7 is on the flight mode switch.
    Max sub trim puts the head speed about 1800 in idle1, then about 20% end point on top of that gives the 2100. The other end point is set to put the channel output at normal centre to switch the gov off in normal (be sure to check that if you ever change the sub trim).
    that leaves all the pmixes free in case you want cyclic throttle mixing (uses two) and rudder to gov mix (constant head speed in reversing piros...).
    ....not get round to setting those up though!
    www.heli-extreme.co.uk a good club in south Sheffield
    600n pro BeastX Align DFC head bls251, 3xbls451, align gov, 600d, 2in1
    trex500, BeastX DS510 swash, Beast X cutr and carve head DS520 HK3026-1900, Align 425D blades, 5S4200 rev'trix, K&BDD dampers, AR6200
    "450" superframeSTK, align DFC head v2tail, hk22281-8 on 3S 9650w9257gear commander 55A align 325D hitec digitals Tarot ZYX, AR6100e
    MCPX kbdd tail and blades, miniaviation bats

    Dont spend more flying models than it costs to fly for real

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    • #3
      Run mine 600N

      1850,1950,2100

      1850 Normal, for some orientation practice.

      1950 Idle 1 although I just go to Idle 2

      2100 is spot on, as under load its should drop into the OS50 best RPM of 17000. be around 2050 at the head.

      Steve
      Midland Helicopter Club

      Citizen Number: 00212

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