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  1. #1

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    1/4 Scale Jet Sprint

    Hi Guys

    I am really keen to build a 1/4 scale jet sprint. I lack the expertise to design the hull from scratch but could probably build the hull and do the jet/motor installation and so on.
    I have trawled over google and RCU but cannot find anything. I want to use a graupner jet 5 with a petrol engine and try to get it looking kind of scale.

    Jet: http://www.highperformancemodels.com...nit%202347.htm

    Please help, I would hear any suggestions as to where I could find a hull or anybody who has general plans for one.

    Thank
    An expert is someone who knows more and more about less and less, until eventually he knows everything about nothing.

  2. #2
    Moderator Justaddwata's Avatar
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    RE: 1/4 Scale Jet Sprint

    Some pics of 2 of my boats and 3 of my pumps.

    http://imageevent.com/justaddwata/myboats/jets

    The smaller boat is by Craig of Swashdrive in Australia.

    There are a few threads on this site if you do a search.
    One of the better gas boat picture sites - http://imageevent.com/justaddwata

  3. #3

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    RE: 1/4 Scale Jet Sprint

    Hi there

    great to hear of another interested in the jet sprints.
    I have leant mine to a mate "QD revenger" and he has just put his quickdraw in my 1/4 scale jet sprint. heres a couple of vids of it running.
    I am in the middle of building the moulds for a jet sprint hull just waiting to hear back from "QD" as to changes to be made before i start glassing hulls
    any other photos you want let me know. i am using a swashdrive jet unit in mine. wiked fun. turn on a dime and accelerate

    cheers
    steve
    Infinity RC
    1/4 scale jet boats

  4. #4

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    RE: 1/4 Scale Jet Sprint

    Cool stuff. Did not know they made jet drives. I own a real jet boat and is a blast to ride. These look like they would be just as fun and probably turn on a dime. Will look into this much more now. Thanks for the pics and info.....

  5. #5
    Moderator Justaddwata's Avatar
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    RE: 1/4 Scale Jet Sprint

    Some video of a buddies Swashdrive -

    http://www.youtube.com/watch?v=FooNxujYHec

    http://www.youtube.com/watch?v=B4dqfJ70Gnc

    http://www.youtube.com/watch?v=t7ufCLieCps
    (Onboard video - skip the first minute warm up. Certainly says a lot about the suction cup holding the camera on).
    One of the better gas boat picture sites - http://imageevent.com/justaddwata

  6. #6

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    RE: 1/4 Scale Jet Sprint

    Thanks for the replies guys.

    Infinity: Are you going to sell some hulls? I would most certainly be keen for one seeing as you are a fellow kiwi that is handy. How far away are you from churning out the finished product? By the way I couldn't see the videos.

    The swashdrives are cool but also very expensive and his latest run has already run out.

    Max
    An expert is someone who knows more and more about less and less, until eventually he knows everything about nothing.

  7. #7

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    RE: 1/4 Scale Jet Sprint

    ahhh sorry i didnt even post the links.

    http://www.youtube.com/watch?v=KHc2JU2oiCk
    http://www.youtube.com/wa...&feature=channel_page

    i should be moulding the hulls in the next couple of weeks just waiting to hear back from my mate with mine at the moment.
    I know the swashdrive is a bit more expensive but the quality is top notch.

    http://images.yuku.com/image/pjpeg/9...d7d23a0e7.pjpg
    http://images.yuku.com/image/pjpeg/6...7c6b3e354.pjpg

    cheers
    steve
    Infinity RC
    1/4 scale jet boats

  8. #8
    Scott Schneider's Avatar
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    RE: 1/4 Scale Jet Sprint

    Squirt boats can take on MANY shapes .... Mine a Swashdrive equipped Microburst mono with self made drop box intake.
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    Love the Hobby, Hate the Politics .....
    Home of MOTORHEADS RC Racing Engines.

  9. #9

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    RE: 1/4 Scale Jet Sprint

    owner www.rcinnovations.co.nz

  10. #10

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    RE: 1/4 Scale Jet Sprint

    Infinity: I like your boat. It is certainly one of the better looking jetsprints I have seen. I can see that the swashdrive is quality but he has run out of his latest run, they are more expensive, and he was a bit rude to me in an email that he sent me in reply to me questioning about hulls. So I do not feel inclined to buy from him. Can you PM me when you have a hull to sell. I am keen.

    I have just bought a 30cc homelite engine from Matrix140 who was building another jet sprint. I know that they aren't too flash but for NZ$100 I cant really go wrong when you see that the price of a Zenoah 260 has nearly doublesd in price in NZ in the last 6 months. A 90 size nitro will set me back NZ$1000 aswell so that is out of the question for now.

    I think someone needs to build a 1.4 scale jetsprint track. That would be cool.

    Max
    An expert is someone who knows more and more about less and less, until eventually he knows everything about nothing.

  11. #11

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    RE: 1/4 Scale Jet Sprint

    Hi there

    sure thing. will let you know when they are done.
    they have been doing major road works just done the road from me and would love for them to build a track while that were at it, dreams are free i guess

    cheers
    Infinity RC
    1/4 scale jet boats

  12. #12

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    RE: 1/4 Scale Jet Sprint


    ORIGINAL: infinityteg

    Hi there

    sure thing. will let you know when they are done.
    they have been doing major road works just done the road from me and would love for them to build a track while that were at it, dreams are free i guess

    cheers
    i would be keen on a hull allso mate
    owner www.rcinnovations.co.nz

  13. #13

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    RE: 1/4 Scale Jet Sprint

    Have you finished your boat yet bently?
    An expert is someone who knows more and more about less and less, until eventually he knows everything about nothing.

  14. #14

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    RE: 1/4 Scale Jet Sprint

    Infinity: Are your hulls going to have Rails/Stringers in your hull?
    An expert is someone who knows more and more about less and less, until eventually he knows everything about nothing.

  15. #15

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    RE: 1/4 Scale Jet Sprint

    it could be any option if you wanted them or not.
    Infinity RC
    1/4 scale jet boats

  16. #16

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    RE: 1/4 Scale Jet Sprint

    Infinity: Yeah, They would make alignment a whole lot easier. They are pretty standard on most hulls.
    Do you have any indication on how much you are going to sell them for?
    It would be nice to know so that I can get my head around it a bit.

    I have seen a futaba 3PM on Trademe for NZ$175 (not the 2.4ghz). It comes with 4 receivers aswell. What do you think of this as a suitable radio for my 1/4 scale. Right now I only have a pair of 2ch AM radios.

    Cheers
    Max
    An expert is someone who knows more and more about less and less, until eventually he knows everything about nothing.

  17. #17

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    RE: 1/4 Scale Jet Sprint

    you will need a fm radio or a futaba 2.4 ........spectrum wont work to well in a boat
    owner www.rcinnovations.co.nz

  18. #18

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    RE: 1/4 Scale Jet Sprint

    Thanks, I guess that it will be a suitable radio then.
    An expert is someone who knows more and more about less and less, until eventually he knows everything about nothing.

  19. #19

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    RE: 1/4 Scale Jet Sprint

    yeah it should be fine. 4 recievers will be a bonus for the next boats (the bug will bite very soon)
    was thinking 250 for a hull i dont want to ,ake money off of it just get more jet boats out there.
    Infinity RC
    1/4 scale jet boats

  20. #20

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    RE: 1/4 Scale Jet Sprint

    250 sounds pretty reasonable to me.

    The bug has already bitten. One reciever will go into my car, and another will go into my current jet boat. It has twin jet unit 2 drives run by 700 size motors. although it still needs some work. Electrics are getting on my nerves.
    An expert is someone who knows more and more about less and less, until eventually he knows everything about nothing.

  21. #21

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    RE: 1/4 Scale Jet Sprint

    I have just bought that radio gear from trademe. I am one step closer to my boat. Just need hull and jet. But the they don't seem so important to me. and then there is the extra 200 you end up spending for the last little bits and pieces that hold the boat together and make it work.
    An expert is someone who knows more and more about less and less, until eventually he knows everything about nothing.

  22. #22

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    RE: 1/4 Scale Jet Sprint

    I got my 30cc homelite today but do not know which pipe on the carb is fuel intake. There is one high one and one low one. Can someone help me out.
    An expert is someone who knows more and more about less and less, until eventually he knows everything about nothing.

  23. #23

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    RE: 1/4 Scale Jet Sprint

    if it has a primer bubble on it just put a hose one at a time and pump it see if it sucks of blows bubbles
    owner www.rcinnovations.co.nz

  24. #24

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    RE: 1/4 Scale Jet Sprint

    cheers bently. that was a great help.

    max
    An expert is someone who knows more and more about less and less, until eventually he knows everything about nothing.

  25. #25

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    RE: 1/4 Scale Jet Sprint

    no probs mate
    owner www.rcinnovations.co.nz


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