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  1. #121
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    Looks to be pretty stable. Very cool.

    Rock
    Team Junk

    No sparkling wiggles in here, only dump truck grinches.

    "Screamin Heathen"

  2. #122
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    Looks very stable.....great job!

  3. #123
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    Great video.

    Am shocked at how well it handled that chop.
    At the 4 min mark you had a great pass on decent water.

    Once on plane and the
    prop hooks, that thing pulls hard!

    Sean, I have to tell you, this is the best executed, first time attempt at a home built 3 point hydro actually get it to run.
    As I’ve stated before, most get to 45 mph and stop.

    CONGRATS!

    As to air traps, absolutely.
    I didn’t catch that you didn’t have them.
    Every one of my hydros had them and was one of my favorite things to play.
    The plans probably said no to protect against liability from novices.
    Thats why the bows not lifting at the speeds you’re running.

    Think of them as a pop off valve for the pressure built under the bottom.

    I always ran mine full depth, full length.
    As in, w/the hull upside down, put a straight edge from the back of the sponson bottom (inside edge) to the edge of the main bottom at transom.
    That builds full lift.

    Once bow pops, it will then start dumping air so you will then be controlling it by walking fore/aft on the floor board.
    As a positive side effect, they will cut down some of the sliding in turns but you will have to lean your body in to turns to keep the outside air trap from catching and tripping the boat.

    My boats ran 1/2 the power you have (but way less weight) so you probably won’t need traps.
    Id try full depth but stop them a foot from the transom.

    Id also suggest that you mount them temporary in prep for alterations.

    Again, congrats!

    I would add, we can tell from the video that you have the thing smoking!
    Be very careful at those speeds, and especially those conditions.
    It can and will bight you.
    I would STRONGLY recommend a race vest and helmet.
    A ski vest won’t stay on if you go for a swim at those speeds.

    In case I haven’t offered before, I’m happy to pm you my # and walk you through what to expect.

    If you were excited w/where you were at, wait till you add air traps.
    The sensation of flying the boat, and the changes in it that you control by body position will likely change your world.
    Maybe we chat while your testing next time??
    I'd rather be competitive w/junk I built in my garage than win w/stuff I bought.


    I refuse to allow common sense to interfere w/my boat buying decisions.


    Checkmate 16' 140 Johnson
    Hydrostream 17' Vector FrankenRude I
    Laser 480 (?) 21' w/GT 200
    Glastron Carlson Conquest w/XP 2.6
    Glastron Carlson CVX 20 w/XP 2.6
    24' Sonic w/twin 250 Johnsons
    24' Sonic w/twin 250 HO Johnsons
    19' STV River Rocket w/FrankenRude II
    Allison XR 2002 w/Frankenrude II
    Hydrostream 18' V-King w/Frankenrude II

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  5. #124
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    Yeeee hawww that looks like fun, congrats! Thanks for the vid
    Hydrostream dreamin

  6. #125
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    Gary, thank you. You are an invaluable source of information on this subject.

    I am very happy with how she is running, it really is a rush to drive. Plus it burns such little fuel. As fun as it is, I k ow there is more speed in the tank.

    What material did you use for air traps? I am thinking about buying some 1/8" aluminum stock and bending it up at work. I have a full sheet metal shop.

    Would 1/8" be strong enough? How would you fasten it?
    The sponson sides are 3/4 mahogany but the bottom is only 1/4 meranti.

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  8. #126
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    For what you’re doing, I like the alum idea and 1/8” would be perfect.
    Start w/them full size, then cut them down as you learn.

    You could mount them w/stainless, pan head sheet metal screws.
    You could cut them down and reuse the same mount holes.

    Id break them so you had mounting flanges located over 3/4” wood, under the skin.

    Drill and mount it first First time then pull all the screws, then thin down some resin 10% with acetone, and use a Q-tip to put it into the screw holes.
    That will allow you to remove, and reinstall the air traps three or four times without stripping the screw threads.

    Once you get the traps where you want them then use sealer on the screws the last time you install them and your done.

    Quote Originally Posted by Seanj85 View Post
    Gary, thank you. You are an invaluable source of information on this subject.

    I am very happy with how she is running, it really is a rush to drive. Plus it burns such little fuel. As fun as it is, I k ow there is more speed in the tank.

    What material did you use for air traps? I am thinking about buying some 1/8" aluminum stock and bending it up at work. I have a full sheet metal shop.

    Would 1/8" be strong enough? How would you fasten it?
    The sponson sides are 3/4 mahogany but the bottom is only 1/4 meranti.
    I'd rather be competitive w/junk I built in my garage than win w/stuff I bought.


    I refuse to allow common sense to interfere w/my boat buying decisions.


    Checkmate 16' 140 Johnson
    Hydrostream 17' Vector FrankenRude I
    Laser 480 (?) 21' w/GT 200
    Glastron Carlson Conquest w/XP 2.6
    Glastron Carlson CVX 20 w/XP 2.6
    24' Sonic w/twin 250 Johnsons
    24' Sonic w/twin 250 HO Johnsons
    19' STV River Rocket w/FrankenRude II
    Allison XR 2002 w/Frankenrude II
    Hydrostream 18' V-King w/Frankenrude II

  9. #127
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    Ahhhh very nice! I like the way you think!

  10. #128
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    1975
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    A guy I knew...… I built the 44 merc for him.... had a Hydro..... kinda big....had been used with the MK 75 H … I had bought.... in 1971....That boat had 2 inch deep lifting traps...….I tried it out and it lifted up 2 inches..... at 30 mph..... scarry for me being a flat bottom boat guy.....He ran even with my B boat with a 44......The old Dazzys…….Will try to post Pixs…..

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  12. #129
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    Quote Originally Posted by Seanj85 View Post
    Here is a link of her running. Still working on setup, I need to get rid of this battery and even though the plans dont call for it, Ron Hill suggested adding air traps. Also going to try another prop, just waiting on them to finish building it.

    https://youtu.be/C3a5m93Jqn4

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  14. #130
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  16. #131
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    For an 11 foot boat she seems to handle the water very well. Motor sounds good too.

    83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
    We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
    Rebuild thread:
    http://www.screamandfly.com/showthre...-it&highlight=
    http://www.screamandfly.com/showthre...cs.&highlight=
    Videos

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  18. #132
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    WOW having fun with out a 300 R...........Rope that motor down.....

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  20. #133
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    Yep.
    Missed that.

    Keeps the motor from kicking up when you let off the gas, and losing control.

    When I was 19 and (full of piss and vinegar) working for my new boss building hydroplanes, and at our first race, and running a Yamato 80 (his) OB on my Butts Hydro, while testing, I decided to show them who I was.

    In a hurry to get in the water (full of.......) I forgot to tie down the motor.
    Straight off the beach, flying the boat towards the first pin of the first turn and back off the gas to set the boat for the turn and....., the motor kicked up and I barrel rolled the boat in front of everybody!
    A 100 yds from where I started!

    They towed the upside down boat, me sitting on top of it..., back to the pits and once my new boss saw I was OK, he shook his head and walked away����

    I did make up for it by winning the race the next day.

    Quote Originally Posted by Dave S View Post
    WOW having fun with out a 300 R...........Rope that motor down.....
    I'd rather be competitive w/junk I built in my garage than win w/stuff I bought.


    I refuse to allow common sense to interfere w/my boat buying decisions.


    Checkmate 16' 140 Johnson
    Hydrostream 17' Vector FrankenRude I
    Laser 480 (?) 21' w/GT 200
    Glastron Carlson Conquest w/XP 2.6
    Glastron Carlson CVX 20 w/XP 2.6
    24' Sonic w/twin 250 Johnsons
    24' Sonic w/twin 250 HO Johnsons
    19' STV River Rocket w/FrankenRude II
    Allison XR 2002 w/Frankenrude II
    Hydrostream 18' V-King w/Frankenrude II

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  22. #134
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    HeeHee......Ya showed them who ya was.......The wet guy.

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  24. #135
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    Hello,
    I received my plans and they appear to show the ribs being installed at different angles in the girders. Does anybody know if the notches for the ribs are all cut at the same angle relative to one another or if they are at different angles? I can't find it specified anywhere on the plans sheet or rib templates for the Ben Hur. I am also wondering if the main sponson beams are detailed in the plans? I see them on the scaled drawing but the lines to measure to are very unclear. Do you just have to wing it on the sponson beams? I also noticed that I am missing the details sheet for the air traps and fin because no rigging sheet was included with the plans even though it is mentioned in the instructions. Any help from fellow builders is greatly appreciated. Thank you everyone.

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