Carl,
I've got a dual manifold gage used in twins. By hooking up one
side of the dual manifold gage to one bank on the rotax and the other
side to the other bank, you can accurately adjust the carbs. My
judgement would be to do it as you would around 3000 rpm and let full
throttle be what it is. You should try to adjust the carbs for even
color but do it carefully!!! A good ground run up several times before
a flight test to be sure it is not too lean after adjusting. Also if
someone around there has a remote reading IR thermometer (the kind you
look through and point at what ever you want to get the temps of) That
would give you a very good idea on mixture balance. No need to fly to
test it. The EGT's will tell you all you need to know.
Jim Nelson
N15JN
<carl@flyers.freeserve.co.uk> writes:
> My Rotax manuals are less than helpful when it comes to setting up
> the
> carbs. I dont really believe that setting up the balance at idle RPM
> will
> give a satisfactory result throughout the RPM range. So at what
> speed should
> the balance be set up - 3000RPM, 4000 RPM.
>
> Also how do you set up the mixture - at present the plugs on the RHS
> are
> black while the LHS are ok (pale brown) - do I need to lower the
> needle or
> adjust the balance ?????
>
> Does anyone have suggestions or ideas on how to set up the carbs on
> the
> Rotax 912 and also any reccomendations on suitable set up equipment.
>
> I understand Skydrive have a balancing kit but have no idea how good
> it is -
> price 50 approx.
>
> I have also come accross a device called Carbtune II intended for
> bikes. (
> www.users.myisp.co.uk/~carbtune/carboprn.html )
>
> Any tips/ reccommendations would be greatly reccommended.
>
> Carl Pattinson
>
> G-LABS
>
> The Europa Forum is supported by Aviators Network UK
> <info@avnet.co.uk>
>
>
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