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[thriggle]

If this works, I might be able to drain out a level of volcano and build even more rooms over it!

Workplace safety? Whoever heard of such a thing?

Or drain the volcano, build enclosed rooms, let the volcano replenish.

I really like this idea. This is the closest we've ever gotten to a working magma submarine.

[Button]

Actually, at this point, trackstop is not needed because the second OO is an unpassable tile, so just make a wall instead at that point. 

I was under the impression that pumps wouldn't pump without an "empty" space to pump into?

[FantasticDorf]

If this works, I might be able to drain out a level of volcano and build even more rooms over it!

Workplace safety? Whoever heard of such a thing?

Or drain the volcano, build enclosed rooms, let the volcano replenish.

I really like this idea. This is the closest we've ever gotten to a working magma submarine.

You could forcefully restrict hatches to the surface and make drain docking stations

(small circular tower with a retractable bridge, lowering the lava levels with a drain reveals a trading depot and magma proof hatch entrances to your base, simply repump and reset when the traders are gone, carefully managing the retraction of the bridge behind them to resubmerge into lava and warm *almost safety. underneath the surface depot in the hatches would be a staircase built inside the lava cistern connected to your base.)

[flameaway]

Concerning using trackstops to dump back into aquifers...aquifers produce more water than mine carts can dump. So, don't think your idea will work.

Keep in mind, my doohickey is dumping into a wall and immediately refilling itself.  My guess is that the game just hiccups and deletes the extra water coming in from the pump.  A track stop dumping into a wall keeps the water level high enough that dwarves will not respond to fill pond orders, even though the hole reads five of seven, the game sees that pond as full.

It's a bug, but a nice one...like a butterfly

[Sanctume]

Probably because there is 7/7 in the tile, but the 2/7 goes inside the minecart, and what remains is 5/7. 

[Button]

Hey so, I was testing out the new version's harvestable nuts, and decided to mess around with this/see if it works as an aquifer piercer.

The answer is yes!




All you need to do is make sure that the trackstop/minecart dump tile you're pumping into is sealed off. The water level on that tile is a steady 5/7. Since it's 5/7, the pump thinks there's room to put the water!

I've confirmed that this isn't a previously-undiscovered function of pumps themselves - pumping into a wall or an empty tile doesn't keep drawing water out of the aquifer.

[flameaway]

Hey so, I was testing out the new version's harvestable nuts, and decided to mess around with this/see if it works as an aquifer piercer.

The answer is yes!




All you need to do is make sure that the trackstop/minecart dump tile you're pumping into is sealed off. The water level on that tile is a steady 5/7. Since it's 5/7, the pump thinks there's room to put the water!

I've confirmed that this isn't a previously-undiscovered function of pumps themselves - pumping into a wall or an empty tile doesn't keep drawing water out of the aquifer.

Have you been through more than one aquifer level?
I've seen a pump delete lava by itself.  I set up a pump over a magma pool.  The pump brings lava from the pump intake, pumps it onto an open tile so that the flow comes back along the pump and back down the intake.  Like a DWR but no channel needed for the water wheel. Anyway that setup will delete a whole level of magma from a volcano.  Seems like when you force more fluids into a tile than the tile can handle, the game "loses" the excess somehow.  A pump setup like this doesn't force fluid into a tile as fast as the portable drain, so the loss isn't real noticeable.

[Button]

Have you been through more than one aquifer level?

Nope. Was only testing it to have something to do while my nuts ripened.

I've seen a pump delete lava by itself.  I set up a pump over a magma pool.  The pump brings lava from the pump intake, pumps it onto an open tile so that the flow comes back along the pump and back down the intake.  Like a DWR but no channel needed for the water wheel. Anyway that setup will delete a whole level of magma from a volcano.  Seems like when you force more fluids into a tile than the tile can handle, the game "loses" the excess somehow.  A pump setup like this doesn't force fluid into a tile as fast as the portable drain, so the loss isn't real noticeable.

...I thought this was the portable drain... What did I get wrong?

[PatrikLundell]

I fail to see how this method would be better than the double-slit one for piercing aquifers, given all the extra construction needed to isolate the output tile after building a track stop on it, unless I've missed some clever twist.
However, it sounds quite useful for dealing with open fluids, where you otherwise run the risk of killing your pumper by sweeping it into the drink. With a sufficiently large array you might actually be able to do construction in the magma sea with limited risk to the dorfs involved (the pumps would be powered to avoid unfortunate accidents when a pumper tires, of course).

[Button]

I fail to see how this method would be better than the double-slit one for piercing aquifers, given all the extra construction needed to isolate the output tile after building a track stop on it, unless I've missed some clever twist.

The main benefit to me is that it allows you to widen the opening without repeatedly piercing the aquifer. I don't like all the extra aquifer outflows that are left over when I widen my 2-slit punch into a proper, wagon-passable ramp.

[PatrikLundell]

I just expand the double-slit with a third row for wagons. As long as the aquifer isn't too deep that works perfectly fine for me, but a third row does generate more cancellations than a two row one.
On the other hand, my main staircase is a staircase, so a wagon path is made specifically to take wagons, not stairs retrofitted later on.

[flameaway]

I fail to see how this method would be better than the double-slit one for piercing aquifers, given all the extra construction needed to isolate the output tile after building a track stop on it, unless I've missed some clever twist.
However, it sounds quite useful for dealing with open fluids, where you otherwise run the risk of killing your pumper by sweeping it into the drink. With a sufficiently large array you might actually be able to do construction in the magma sea with limited risk to the dorfs involved (the pumps would be powered to avoid unfortunate accidents when a pumper tires, of course).

I messed about with aquifers and these dwarven sinkholes.  I did not find the portable drain very useful for that task. However, using it to pierce a volcano safely and at any depth is super handy.  I in the process of casting a huge block of obsidian... Inside the shaft.  Because I want to mine out my lava submarine, not construct it... Can't engrave constructions.  Also want to know if such a fort would be considered inside.
The whole thing will submerge, once I stop draining the magma down a portable hole.

You can constructing buildings in that pumps intake channel, you know? All while z levels of magma hover over your dwarven builders. A grate makes sense, or a floodgate, but what about a roller?  Put another PD there and seal off the opening, and you've permanently lowered the level off magma in the shaft.

Also makes fluid traps wayyyy easier to set up and manage.

And my plumbing system just got way more compact... no more draining off the edge of the map, or into the caverns for me.

Finally, just for giggles, consider a minecart loaded with water on a track stop dumping into a wall.  Can you fill that hole with magma when the track stop is switched off, not dumping?

What happens when you switch the stop on?

I'm gonna find out.

[PatrikLundell]

You'll have to wait for DFHack to try turning track stops on and off, though. Sound's like an interesting test, though.

[flameaway]

You'll have to wait for DFHack to try turning track stops on and off, though. Sound's like an interesting test, though.

Why?  You can just link the stop to a lever, or pressure plate. Track stops are switchable.
For example, with a portable drain you can link the stop to a lever.  In a normal setup, when the lever is off, and the track stop is dumping into a wall, the fluid level will trend toward 5/7. You really have to force fluids into that hole to get the level to rise above five. Flip the lever and the stop ceases dumping so, if you keep the pump running the level will rise, and fluids will act normally. 

[PatrikLundell]

Oh! I had no idea you could link track stops. Thanks for enlighten me!