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  1. #1
    CustomPC's Avatar
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    Webra .50 Speed

    I broke-in my Webra .50 Speed yesterday and recorded the following figures after three 14oz tanks ran rich just breaking from a slight 4-stroke.

    Fuel was 20% castor, 80% Methanol (Nil Nitro).

    APC 12x4 13,200 peaked.
    APC 10x7 14,000 with room for more. I didn't want to push it on a new motor.


  2. #2
    Ernie Misner's Avatar
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    RE: Webra .50 Speed

    What a nice engine. I am jealous. Very lightweight too.

    Do you folks run zero nitro down there?

    Thanks,

    Ernie

  3. #3
    CustomPC's Avatar
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    RE: Webra .50 Speed

    The manual says to break in the engine with 0% Nitro and 20% Castor.

    After the break-in you they suggest 16% synthetic and 2% castor and 5-10% Nitro.

    We have some pylon classes that only allow 0% fuel and i'm also making an effort to start using less nitro on all my models to save running costs.

  4. #4

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    RE: Webra .50 Speed

    I have identical numbers with my new 50. The stock torpedo looking muffler is very loud however.
    Tom G.

  5. #5
    CustomPC's Avatar
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    RE: Webra .50 Speed

    What did you say????

  6. #6

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    RE: Webra .50 Speed

    huh?! I'm going to build a moussecan type pipe for it.
    Tom G.

  7. #7
    CustomPC's Avatar
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    RE: Webra .50 Speed

    I bought an Ultrathrust for mine but haven't got around to trying it yet.

  8. #8
    Kmot's Avatar
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    RE: Webra .50 Speed

    16000 on a Top Flite Power Point 10x6 during this break-in on Powermaster 15% nitro fuel.


    http://media.putfile.com/Webra-50-Break-in-Runnung

    Edited to correct propeller brand name.
    ~Tom~

  9. #9
    DarZeelon's Avatar
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    RE: Webra .50 Speed

    Tom,


    It seems you ran this Webra way too rich...

    It only needs ~500 RPM below the absolute peak to keep it a bit cooler, but during your runs it was mostly four-cycling and much slower...


    I saw such an engine exactly, peel its sleeve while being run like that (or even somewhat richer).

    ...The only non-OS I have ever seen peel its nickel...


    Letting an AB(X) engine run too cool during break-in, is akin to letting a heroin junky get his fix... It will never do the engine any good...


    Dar Zeelon - ISRAEL - ddzeelon@gmail.com
    MVVS - Jett - MS Composit - Rossi - Mejzlik


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