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  1. #1

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    Webra .40 (6,5ccm) RC Blackhead with rear fan

    I use what seems to be a limited production, little documented variation of the original 1970/80s Webra Blackhead .40
    that has a crankshaft drive 'power takeoff' for a fan. Webra ( or a contractor?) accomplished this by installing a crankshaft with a longer than normal crankpin, the extra protrusion of which is used to drive a shaft mounted in a dual ball bearing equipped mount that substitutes for the rear crankcase cover. I have a number of these engines in various of my (land based) models and they've performed so well over the years. Sturdy as the base Blackhead 40, easy to maintain and powerful enough to do the job intended.

    I've found precious few, none actually, references to this engine. I thought I'd heard once that they were made up for Schulter, the one time rc heli company but found nothing to support this either.

    My question is this. Do any of you out recall seeing write ups on this variation? Any and all references would be welcome.
    While I'd welcome any examples of the engine as well that isn't my prime reason for posting this, I really would like to hear from others with experience and written material about this engine.

    Thanks,

    Jerry
    - http://tanks.linite.com/

    ~ Sic biscuitus disintegratum ~

  2. #2
    Broken Wings's Avatar
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    RE: Webra .40 (6,5ccm) RC Blackhead with rear fan

    Hb did the same thing, used in Helicopters and model boats. I believe they were called Stamo's.
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    Club Saito member #715
    Club Jett member #12

  3. #3
    Kmot's Avatar
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    RE: Webra .40 (6,5ccm) RC Blackhead with rear fan

    I happen to have one of those HB versions. I will get pics for you later.
    ~Tom~

  4. #4

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    RE: Webra .40 (6,5ccm) RC Blackhead with rear fan

    I will get pics for you later.
    I'd like to see that please.

    Thanks.

    Jerry
    - http://tanks.linite.com/

    ~ Sic biscuitus disintegratum ~

  5. #5
    Kmot's Avatar
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    RE: Webra .40 (6,5ccm) RC Blackhead with rear fan

    Here you go Jerry:
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    ~Tom~

  6. #6

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    RE: Webra .40 (6,5ccm) RC Blackhead with rear fan

    Thanks both of you for the photos.

    I had a hand at flying helis in the late 70s through the mid 80s. I started with Kavan's models and they had the fan driven from the prop washer. Seeing these HB engines and the Webras that I have it seems they were not that popular were they? From my allpication they seem very compact and efficient. I'm not very engine savvy other than for a few specific types but it is odd these never really caught on, perhaps more costly?

    My application is shown here:


    And there are few engines that would serve the need as well as the Webra 40 euipped with the rear fan.

    I'm actually engaged at the moment in replicating the parts for a regular version of the engine to convert it to this configuration.

    Jerry
    - http://tanks.linite.com/

    ~ Sic biscuitus disintegratum ~

  7. #7
    LeeHop's Avatar
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    RE: Webra .40 (6,5ccm) RC Blackhead with rear fan

    Tanque, I gotta ask...what is it?

  8. #8
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    RE: Webra .40 (6,5ccm) RC Blackhead with rear fan

    A paddlewheel boat? I'd like to know, too.

    David

  9. #9
    Kmot's Avatar
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    RE: Webra .40 (6,5ccm) RC Blackhead with rear fan

    I want to see video of those machines running.
    ~Tom~

  10. #10
    Kmot's Avatar
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    RE: Webra .40 (6,5ccm) RC Blackhead with rear fan

    It is a drive train for a tank:

    http://www.geocities.com/pentagon/2828/jp.html
    ~Tom~

  11. #11

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    RE: Webra .40 (6,5ccm) RC Blackhead with rear fan

    I want to see video of those machines running.
    A paddlewheel boat? I'd like to know, too.
    Tanque, I gotta ask...what is it?
    They are ( there's two complete units) 3 fwd speed+1reverse transmissions for rc tanks. These are braked differential
    transmissions. The Webra is started via self starter. Sort of a "power pack".

    Here's one mounted and running in the lower hull of one of my models:


    another vew:


    While it looks as it was going fast it in fact wasn't but a crawl, top speed isn't very fast by design, but they are powerful.

    Here's a video clip albeit not a very good of one of the models running( from the model's perspective):
    Panther in Action

    I have more info on my website Armor Group West


    Jerry
    - http://tanks.linite.com/

    ~ Sic biscuitus disintegratum ~

  12. #12
    Kmot's Avatar
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    RE: Webra .40 (6,5ccm) RC Blackhead with rear fan

    Darned video won't load.
    ~Tom~

  13. #13
    Kmot's Avatar
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    RE: Webra .40 (6,5ccm) RC Blackhead with rear fan

    Tanque (Tank!):

    The video on Youtube will not load. Not yesterday, not today. Perhaps you could upload it to RCU Videos?
    ~Tom~

  14. #14
    LeeHop's Avatar
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    RE: Webra .40 (6,5ccm) RC Blackhead with rear fan

    Tanque's YouTube video worked for me...

  15. #15
    Kmot's Avatar
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    RE: Webra .40 (6,5ccm) RC Blackhead with rear fan

    All I get is a rotating circle thing. Hmmm........ [sm=confused.gif]
    ~Tom~


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