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[Ixoran]

You guys rock. Turns out i misunderstood screw pump placement pretty bad.
I thought:

Code: [Select]

Xx
 ^
 |
brings water up here

When it's really:

Code: [Select]

Xx_
  ^
  |
from here

But the whole kickstart the system thing... well, THAT is a BIG help.
Should be on the wiki.

[Mr. Wallet]

See what I was doing was having a C shape at Z level n and the pump and wheel at Z level n+1.

It's reliable at high water volumes in the sense that the thing will keep working, it just doesn't maintain power 100% of the time due to fluctuations in water flow.

I'll try pump-wheel-waterfall (as opposed to my pump-waterfall-wheel) and hopefully that'll work out better; I've actually noticed much more consistency in high-volume pumping if there's floor under a pump output (although logically that shouldn't make any difference).

EDIT: nope, same problem. I tried at various levels of fullness this kind of set-up:

Code: [Select]

LEVEL 0:
 +----+
 |....|
 +--+.|
    |.|
    |.|
    |.|
    +-+

LEVEL 1:
 +----+
 |.   |
 |.+. |
 |.|. |
 |.+. |
 |.<% |
 +--.-+

LEVEL 2: (= and I are axles)

 +-+
 |W+-+
 |W=*|
 |W.I|
 +-+*|
   +-+
The power still intermittently cuts out. It's annoying as all-get-out. I'm ready to give up altogether and go with querns.

[Dareon Clearwater]

Fluctuations in water flow are the bane of my power plant.  I set up five wheels in the loop design shown on the water wheel wiki page, and normally only two or three of them work.  The one closest to the pump intake seems to be constantly at too low a level, and the one at the pump output isn't detecting the constant 7/7 water as flowing, I think.  I added a couple of windmills above the gear assemblies just to get some constant power in order to avoid lockups if the level dropped so much only one wheel was turning.

[Puck]

I kept my powerplant simple, and the worst that happened was that it ran at half power, once it was fully submerged in highly pressurized 7/7 but it still worked 

It was a single pump in a small room, left and right of it was channeled out, for the waterwheels.
the built powerplant looked like this;

Code: [Select]

#########
#       #
#WWW^WWW#
#WWW%WWW#
#WWWHWWW#
#########

#=wall
W=Waterwheel
H=Channel
I believe that setup was already posted. Keep in mind you still need 2 access shafts, where doesnt matter. Personally i like one to come from the south, in the middle. I put a grate over that H so your dwarf can kickstart the pump.

the second access is for water. its probably useful to do it similar to an irrigation system, ie, calculate the water you want inside your plant (rule of thumb maybe the channels beneath the W's to 7/7, rest empty, so you want a 18 tile chamber with floodgates before your power plant.)

fill that reservoir all the way up, close it off from the water source, then let it flush inside your power room. kickstart the pump. and there you go.