Work

[den]

Problem:

Take one of these:


And fill it in 5 minutes.

We've talked him down to 10 minutes.

Which is nice.

Comments

[thoughtsdriftby.livejournal.com]

Awww, don't you want to cut it down to one?
If you build a tank over the truck and have a tank with about twice that volume of compressed air you can fire the water down into the tanker. Poor sod if he didn't line the fill hole up. The time can be spent the extra minutes to reload. Of course there should be flashing lights and a horn since without the truck you might kill stray pedestrians.

[dewhitton.livejournal.com]

I think with that setup we'd have to rebuild the fill-point after each fill. 200 tonnes of water traveling at near-supersonic speeds would crater the truck.

[thoughtsdriftby.livejournal.com]

It's extra if they want the truck redesigned. :-) It's fast but not supersonic and the load isn't all at once so it's much like loading rock and likely where they borrowed their time-to-fill number. Funny as it might sound the air over water method doesn't have the water hammer problem. It is noisy and requires regeneration time though.

Let's see if they would allow a 24" pipe (looks to be a 30" opening) it's under 7 ft/sec. A 16" pipe would be just over 15.3 ft/sec or about when the force on bends and the jet reaction start to be fun. I'm assuming a 2000 lb ton, 62.4 lbs/cu ft water, and about five minutes. That the whole thing has to start from rest would have to be added and the numbers recalculated but speeds under 40 ft/sec make this very possible. Head... not a problem, rather low actually, well within gravity feed. Head = Vel^2/2*g ignoring friction. I'd bet I could do it under 3 minutes without breaking the truck.