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Posted by Bob F on October 17, 2008, 9:01 pm
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> Doing a little tuning now that winter is here.
>
> Starting with the connections I used a larger T on the 1-1/2 inch line
> and then stepped down to the 3/4ths at the last possible section before
> the nozzles. Also took apart all the connections and dremmeled out the
> steps to help a smooth transition between sizes, rather than having hard
> edges going from like 1-1/2 inch to 1 inch and then to 3/4 ths -- kind of
> like you would to port and polish an intake manifold for an engine.
>
> I'm still trying to get a large Wye rather than a T. I have access to a
> fire hose Wye but making the quarter turn connection (wildland
> firefighting) to NTP is somewhat difficult. Also saving up my pennies to
> move to two inch rather than inch and a half, which should nearly double
> my output according to the math. Its not cheap though.. so I might hold
> off on the wye biz till I upgrade the main pipe.
>
> Also moved the nozzles as close as I could get to the pelton wheel
> without hitting it.. I'm getting around 40 volts open running where as
> before I'd get maybe 30-32. Now i just need to redesign the brakets to
> keep it aimed better, but i'm getting ready for some serious rain.
>
> Still can only run it about 10 hours a day now.. come the RAIN!
>
If you already have the 1 1/2" pentstock, you could add another for less losses,
rather than replacing the whole thing. This could eliminate the Wye, also.
For the Wye, they might make such a part for built-in vacuum systems.
PVC pipe can be bent when it is heated, and perhaps even stretched to smaller
diameters for nozzles.
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