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  1. #1
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    My ultimate project?

    You may recognize this hydro from the boats for sale here, it belonged to Steve Smith out of KY. I haven't weighed it, but Steve claimed 245#. The power will come from a rocket engine that will produce 6250 H.P. for five seconds. If five seconds seems like too short of run time, click the link for a demo of the same power in a car on a drag strip. The same thrust pushed a car to 343.5 KPH (213 MPH) in 2.5 seconds. http://www.youtube.com/watch?v=CDDI5h8JQE0 The thrust is produced simply by super heating water way past its boiling point, 467 degrees F will create 500 PSI in a tank. When a valve is opened to atmosphere, the water will instantly flash into steam and expand 1600 times it's volume. The steam, directed through a 66mm nozzle will exceed the speed of sound (1500 FPS) and produce 3000 lbs of thrust. The tank will be designed for a burst pressure of 3000 psi, a working pressure of 1500 psi and it will never see over 500 psi for safety. The tank body and ends will be made from .125" chromoly (4130N) and will be hydro tested before use. At this time I'm thinking there may not be a single wire, switch or battery, just air operated valves that open and close a single moving part. The cost of heating the water should only be around ten dollars and the thousandth run will be identical to the first with nothing losing compression or needing maintenance. I'll post more details in the near future.


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  2. #2
    Join Date
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    GRAND HAVEN MICHIGAN MI
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    where do you plan to test it?

  3. #3
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    Can u kill the power if things go aray
    19 bullet
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  4. #4
    Join Date
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    Ontario, Peterborough
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    Cool Project.
    Subscribed to this thread.

    1994 16' Murphy 1991 115 Merc
    1985 12' Charger 1989 70 Merc
    1981 18'DL Charger 1989 200EFI Merc

  5. #5
    Join Date
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    Good luck.
    Team Junk

    No sparkling wiggles in here, only dump truck grinches.

    "Screamin Heathen"

  6. #6
    Join Date
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    Thats CRAZY!!! Good luck and be safe.
    Rob Lankford

    1988 20' Action Marine 2.4 200

    Previous owned boats worth mentioning

    1976 17' Action Marine 2.4 200
    1984 20' Action Marine 2.5 200
    1983 17' Hydrostream V-King 2.4 Bridgeport
    2003 LPB STV RR COPY 2.5 280 /300 Drag
    2005 LPB STV RR COPY 2.5 280
    2005 Baja 23 Outlaw 6.2 Mercruiser
    2006 FTP Quarter Shot T3 Race 2.5 200 CARB/2.5 225 PROMAX
    2009 FTP Quarter Shot T3 Race 2.5 280




  7. #7
    Join Date
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    You will have the "green" motor record!
    13' Biel tunnel AKA "Flight Risk"
    13" Modified Yamaha V4 - 101 mph

    21' Paramount
    Mercury 300 Promax

  8. #8
    Join Date
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    Holy Smokes !!!! Hang on!!!!
    Brent
    2009 LCB 2005 300X

  9. #9
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    For some reason the few people that have used super heated water for rocket power, use 470 degrees F (500 PSI). As water is heated in a pressurized container beyond that point, things start to happen quite quickly. Here is a table of for temp/pressure of super heated water; http://www.engineeringtoolbox.com/sa...ies-d_273.html Notice that at 705 degrees the pressure is 3,200 PSI. I have plans to construct a smaller test tank and see what these higher pressures and temps do for thrust. Of the small number of people that have used this process for rocket power, here is a link to a guy that is planning an "Evel Knievel" type, stunt jump some time in the future. There are three tests of his steam rocket from one-quarter power to two-thirds power. http://www.madmikehughes.com/RocketPropulsion.html I'm thinking one quarter would be 125 PSI and two-thirds would be two-thirds of five hundred PSI or 330 PSI. The beauty of this rocket would be the fact that you can start off at a low pressure, anything above 212 F will start building pressure. As for the question of being able to shut it off, the air operated valve will work easily in both directions. I plan on doing several tests with the hydro safely tied down to the trailer before trying it on the water. The rocket tank will be tied in to several points, including the transom, of course, with right-left hand rods that can be pre-loaded to avoid shock to the boat. Notice how jumpy the guys are that are testing their rocket as they start to get above 1/4 pressure. At 1/4 pressure they simply walk up and trigger it by hand, but at higher pressures they cautiously try to open the valve with a long rod. In my hydro project, the tank will be directly behind my back with a thin aluminum fire wall to separate me from the rocket. As scary as it sounds, chromoly tubing with high strength rod ends have much more strength than should be needed to hold it in place. (a 3/4" 4130 rod end has a breaking strength of 26,000 lbs.)

  10. #10
    Join Date
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    Shepherdsville, KY
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    Keep us informed Dixon i know you can make it work. will it be safe? how safe is a 245lb. hydro with a 350 HP. drag & another 300 hp 2stage nitro kit. anytime we climb in one of these big boy toys you know a certain amount of safety stayed behind at the ramp. Peace steve

    Steve Smith
    Shepherdsville, Ky
    502-693-3273

    Click Link to Visit our Website at
    http://www.sdspropshop.com


  11. #11
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    Thumbs up

    Very cool and crazy project! I enjoy watching and listening to people that think out of the box! GL and be safe!
    Subscribed.

  12. #12
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    Very cool! Scary fast! Wind and water would have to be perfect tho!

  13. #13
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    That boat LOOKS like it needs a rocket motor! I remember back late 60's either Owsego Ill, or Union Grove Wi dragstrip. All exhibition rides. There was a twin SMALL rocket engine Gokart!
    It didn't start out too fast, but seems 30 feet out it was HANG ON! I can't remember the trap speed, but he shut it off early as a short W/B kart gets awful squirrely past 100! Funny too as also there was the "other "Michigan Madman", EJ Potter on the Chevy V-8 dragbike!

    Best of luck and fun the new project...(have to go back and see the links now!)
    Last edited by Robby321; 02-08-2014 at 04:20 PM.

  14. #14
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    Thats nuts...
    Quartershot T-3R 15" 3.5L E-Tec 1.62 Sportmaster


  15. #15
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    Should be interesting.


    Dave
    1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
    1988 BAJA Sunsport 186, 96 225 Pro Max
    79 12' Auminum, 95 Merc 9.9
    RIP Stu
    "So many idiots, so few bullets"

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