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  1. #1

    Join Date
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    GMS32 with pipe

    I've been tuning the header/pipe on my GMS32 and here's what I've got so far:

    MAS 9x6 with standard muffler: 13,800 RPMs
    MAS 9x6 with pipe: 15,500 RPMs

    The header is still a little long but I think I'm getting close but can someone tell me how these figures compare to other 32-sized motors?

  2. #2

    Join Date
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    RE: GMS32 with pipe

    What pipe/header are you using and where did you get it?

    Thanks

  3. #3

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    RE: GMS32 with pipe

    I just ran my OS32F for the first time. Bought it used. lso looking for comparison info.
    3200' ASL
    90 degrees F
    APC 9x6
    10%

    14200 rpm, will richen a touch if needed according to the nose up test. Will go into a still in progress Sig Kobra.

    MikeB

  4. #4

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    RE: GMS32 with pipe

    Got 2 of them on moosecan mufflers from Ky--Running a 8x6 on 15%--One turns 17500 and the other turns 18k--They get the job done

  5. #5

    Join Date
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    RE: GMS32 with pipe

    Hi Bruce.
    So far, what has been your experience with this engine ?
    Thanks
    ProBro #2077
    http://image2-0.rcuniverse.com/e1/forum/upfiles/57402/Nl29490.jpg

  6. #6

    Join Date
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    RE: GMS32 with pipe

    My ASP XLS .36 turns JXF 8x8 at 19000 rpm when fitted with a .21 purple pipe from Justengines

  7. #7

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    RE: GMS32 with pipe

    jxf ? what is that ?
    ProBro #2077
    http://image2-0.rcuniverse.com/e1/forum/upfiles/57402/Nl29490.jpg

  8. #8

    Join Date
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    RE: GMS32 with pipe

    AKA ho chi minh model prop looks just like apc or master airscrew very cheap plice

  9. #9

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    RE: GMS32 with pipe

    [sm=lol.gif][sm=lol.gif] Close, but no cigar

    Here it is: http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9880&Product_Name=JXF_8x8_/_203_x_203mm_Poly_Composite_propeller_(2pcs/bag)

  10. #10
    MJD's Avatar
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    RE: GMS32 with pipe

    GMS .32 with carb fixed - APC 8x6, 15% fuel, rich 2C: 18,300 with MAC open pipe. (Tuning setup for 8-7 flight prop). Pipe/header length not tweaked from initial setup, may be more there.

    MJD

    Sorry I'm late dear, I had to help my uncle Jack off his horse.

    Revver Bro #231

  11. #11

    Join Date
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    Lee\'s Summit (KC), MO
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    RE: GMS32 with pipe

    I have a GMS 32 with about a gallon of fuel thru it. I recently got a Kentucky mousse can muffler for it. Have it on a TufFlight Predator weighing 2.75#. The stock muffler weighs 2.7 oz and the mousse can/header only weighs 1.9 oz

    80 F
    95% humidity
    1000 ft alt
    All tests within 20 minutes of each other

    Fuel:
    12.5% Nitro
    21% oil 50/50 synth/castor

    TNC tach
    Radio Shack sound meter A-weight slow
    Prop Power Calc

    Stock Muffler:
    APC 9x5: 15,300 peak rpm, 92.5 dB, 72.5 mph, 5.12# free air static thrust, 0.75 HP
    APC 9x6: 14,100, 91.5 dB, 80.0 mph, 4.87#, 0.70 HP

    Mousse Can:
    APC 9x5: 17,500, 95.0 dB, 82.8 mph, 6.70#, 1.12 HP
    APC 9x6: 15,600, 92.0 dB, 88.6 mph, 5.96#, 0.94 HP

    The mousse can rocks!!!

    Here's a couple pics of my engine:


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    I want to die peacefully in my sleep like my Grandpa. Not kicking and screaming like the passengers in his plane.


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