1. DDz Quorum Sid Posted May 11, 2010 1. DDz Quorum Share Posted May 11, 2010 This Jetlev is a great concept and looks like FUN!! Perhaps Painless and Fireman have built something similar and used it on a lake or river? I did some years ago - it didn't take off but it was a means of getting around on water...... As a crew at work, we took 2 fire engines to the local lake, in fact a disused quarry. We took 6 sections of short ladder and lashed four together in a square, then used the other 2 sections as bracing and a 'floor'. We then 'waterproofed' it and gave it buoyancy by placing the structure on a large plastic salvage sheet, folded up the sides and lashed it onto the ladders using a line. A portable fire pump was placed onto the floor and the suction hose and filter was placed and submerged in the water to the rear (similar to the Jetlev). We finally took 2 angled couplings off the hydrant standpipe, connected these to the water deliveries on either side of the pump and connected a controllable nozzle in each. The pump was started, water sucked up and discharged through the rearward facing nozzles. Opening and closing the nozzles gave us direction, but not much speed. Still, it worked and showed that the reaction from the jet of water was enough to provide forward motion.Great fun at the time and a good application of ingenuity and adaptability. Wish I had some photos. We did this a couple of times but lost interest when we realised that the lake was 30ft deep and that if it capsized we would loose the lot...in fact, another crew tried it on a shallower lake at Hewell Grange, a local prison, and did sink. Fortunately they were able to retrieve the gear. As an aside, Hewell Grange was used by US Forces during WW2 and it was rumoured that when they finally left, Jeeps and other equipment were dumped in the lake there. This has fascinated me for years and it was only recently that I found out that the kit wasn't dumped in the lake - it was buried in the grounds and forms part of the dam wall for the ornamental lake. Not much chance of recovering that really!! Cheerzen Quote Link to comment Share on other sites More sharing options...
1. DDz Quorum Painless Posted May 11, 2010 1. DDz Quorum Share Posted May 11, 2010 ~S~ Skidders, Yes we have had a go at exploiting jet reaction on several occasions. Usually down at Southse sea front on a sunny day for maximum errrr.......PR effect ? LOL A raft was constructed something like yours using empty foam cans for buoyancy. This we ran with the Light Portable Pump in the castle mote . Steering was the main problem resulting in various crashes and sinkings due to the relative immovability of the stone mote walls ! Also crew members had often eaten too many cakes so the displacement was too great That flying idea might just work though ..............4x 1" nozzles, 5000Ltr/min pump, 10 Bar , 1x naked firefighter (inverted)............ ~S~ Painful. Quote Link to comment Share on other sites More sharing options...
Perfesser Posted May 11, 2010 Share Posted May 11, 2010 Mythbusters did a segment on this. Somewhere on youtube is a vid of a car being lifted by 4 hoses. They found the car had to be stripped down to the bare body for it to work. I saw the man lifter on a science show. The guy worked on it for a number of years. Quote Link to comment Share on other sites More sharing options...
Rattler Posted May 11, 2010 Share Posted May 11, 2010 I wonder if that would work on a Beamer...... Quote Link to comment Share on other sites More sharing options...
1. DDz Quorum Painless Posted May 12, 2010 1. DDz Quorum Share Posted May 12, 2010 I wonder if that would work on a Beamer...... ~S~ P. Quote Link to comment Share on other sites More sharing options...
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