Anna Konda, the Robotic Firefighter 94
Roland Piquepaille writes "In fact, Anna Konda is a robotic fire hose moving like a snake. This robot, which has been developed in Norway by SINTEF, is 3 m long and weighs 70 kg. The snake contains 20 water hydraulic motors that move the robotic joints. And the energy needed to power these motors comes from water pressurized to 100 bars and already available inside the fire hose. This gives enough energy to this water-powered robot to climb up stairs, to lift a car up off the ground or even break through a wall. Very clever design! The designers think that this robot could not only replace humans to fight fires when it's too dangerous for them, but could also be used for subsea operations or explosion prevention. An additional overview contains more details and pictures of this snake robot."
Movement (Score:5, Interesting)
Great stuff. It not entirely new though.
This is my fave out there at the mo. Snake link (click the images for vids) [snakerobots.com]
100 bars?! (Score:5, Interesting)
Re:sssss (Score:3, Interesting)
Try not to make assumptions regarding posts and their posters on the basis of their literacy skills. Ever. It makes you look foolish in the long run.
Of course they get it! (Score:1, Interesting)
It amazes me that guys like you can't see the obvious: why else would every single submission by 'Roland' get plastered on Slashdot? Why else the earlier submission of the same article (from the original sources, no less) by other submitters is always ignored?
'Roland' is just an extension of Slashdot's marketing machine. How can you imagine otherwise?
Re:And Then Again, Maybe Not (Score:2, Interesting)
Actually, it's going to have to continously spray water just to move, since having a water return line would be a little silly. I'm really curious if the motors are attached in series or parallel - i.e. does each joint spray a little every movement, or does the nose constantly spray to some degree? Too bad there aren't any pictures I can find.
Re:Of course they get it! (Score:2, Interesting)
The question is, why didn't YOU submit this story first?
There's certainly room for improvement, but Cmdr Taco himself pointed out that there's no good reason to assume a conspiracy in this case, just blind chance. (Roland wasn't even in the top 10 of people who got their stories submitted at the time, but everyone noticed because he's one of the more annoying. And some people scream about it, which gets more attention.)
Re:And Then Again, Maybe Not (Score:4, Interesting)
Presently, there's two popular tip-types - the TFT (taskforce tip) which has an adjustable "spray" pattern, and the smoothbore, which is actually not a tip at all. It's just a pipe.
Arguments over which is better have raged on, forever. In either case, though, the goal is to get gallonage onto the heat source. The theory of water as an extinguising agent is fairly simple - we want to stop the chemical reaction by eliminating Heat from the equation. Water is ideal - to raise 1 gram of water 1 degree celcius, it takes 1 calorie. Great! I've got a fire producing 2000 calories of heat per second. That's gonna take a lot of water to mitigate.
But, there's a trick - we don't want water. We want STEAM. Water needs 1 calorie for that 1 degree, all the way up to 99 degrees. But... to get from 99 to 100 takes... wait for it... 1400 calories. That is a LOT of heat.
Water doesn't put fires out. Water converting to steam does. That ONE degree shift is what fights the fire. Any water that ends up on the floor is a waste of time.
The TFT theory is based on surface area; a bunch of droplets will have more exposed surface area than a cylinder ("straight stream") of water, hence will evaporate faster / have a higher conversion rate.
The smoothbore argument is based on penetration; with a solid ("straight") stream, you know the water is impacting the hot surface pretty hard with some depth of penetration. Since that water will be trapped, its only way "out" is to convert. It has the added advantage of being able to blow holes through things that are in the way... walls, furniture, whatever. Smoothbores are obviously popular with urban companies, like FDNY for example.
The tight-spray actually isn't that relevent to distance; it's all about NOT screwing up the thermal strata in the room. A smoothbore is ideal for a cooker, since there is almost no drag and (therefore) no venturi effect. A TFT, with all of its droplets, has a lot more cross section - but these droplets create a big venturi as they travel through space. The resulting turbulance can suck the hot stuff above into the cool stuff where we are. That's the argument in the US, anyway. The Europeans see it a completely different way... but their building construction is completely different, also.