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  1. T

    Carb Flowbench Testing

    Seem to have found back an older topic, anyway I couldn't help myself......very interesting
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    WTB .21 Zoom III nova carb

    Hi guys, Thinking about doing something with the hobby again. Hence looking to buy a: Zoom carburetor for .21 engines in the novarossi style mounting (shipped to the Netherlands paid preferably by paypal) Any one know of one or can help me out would be much appreciated. Looking forward to...
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    Port Width Calculator

    Lohring, have you checked the coding behind the program? if i was programming for engineers i would also make them input the straight measurement. it is not trust worthy to let people measure the arc length as the might need to resolve to tools with large margins of error. then if it is...
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    JAE.21G plans are officially released!!!

    I've got to ask when building with a rear induction motor (MAC) would the motor location need changing with the slightly heavier motor and the pipe way more backwards? Other then that looking forward to see it go. And thanks to all who make this design available!
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    Comment by 'Tom v.d Brink' in media 'Another close-up of the engine from the rear'

    superb looking piece of engineering! can't wait for the running video.....
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    rigger pulling to the right ?

    jeroen, the depth of your rudder might well be a problem as well. 3inch is a depth used for .45 size boats with 60mm propellors. my rudder is about 3.75" from the bottom of the hull and on high pitch propellors i still have to be carefull not to go on the throttle to quick as it will pull.
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    Looking for spray bar plate for cmb evo45 carb

    Paul, option1 talk to jack, he got all my old cmb45 GPE parts a while ago and there were two or three in there I am pretty sure he doesn't use all but you will need to replace the o-rings. option2 I have for you a MAC like spraybar plate for which you need to use an in-line needle valve...
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    rigger pulling to the right ?

    chris is absolutely correct lifting and digging in turns is a result of vertical turnfin angle. normally you align the bend lines of the turnfin to run parallel to the hull or if your hull is setup incorrectly (and the hull does not run level) you might need a different angle then paralel in...
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    rigger pulling to the right ?

    It would have been better to set up your sponson angles as well before testing again. I do advise you do this before trying other things.
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    SOLD- AB modded MAC45

    sold! will arange things with you by email don.
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    divinycell H

    which version of divinycell are you guys using actually? they have various densities.
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    rigger pulling to the right ?

    Jeroen, could have just called me but anyway, steering left without throttling down is a real no-no with any rigger as has been said before. turnfin is as said before angled on outside only at 45degree sharp edge. (sharpness, as long as not ridiculously blunt, is not that much of a factor at...
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    Model Boater Goes 98.8 MPH in full size electric Hydro

    Awsome mike!!! must be an absolute thrill to ride the boat instead of beeing on shore with the remote. go get that 100.
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    Happy Birthday Walt!!!

    Walt, happy birthday!
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    Weather and its effect on performance

    Tom, I'm sorry but if you came to a day where the only change is the increased humidity then it is not possible to have to richen your motor up. air density goes down by increased humidity (humidity=percentage of water vapor contained in the air over the maximum capable water vapor possible in...
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    Tom Van Den Brink

    pm replied brad
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    Engine Question

    for sure any engine parts are needed but also a budget engine for the people in it for the fun of racing. the high end version is also great for the real boating freaks. B)
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    Head bolt size for Mac 45

    M3x16 like all 45cmb's have as well
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