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  1. #1

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    Advanced 'SI' style Hydro.

    Will be starting on this build shortly, just getting materials together.
    Basic top profile, will be finishing complete plans as soon as I can.
    Will be for gas motors 25cc+.
    Overall 45" long by 30" wide with inside edges of front sponsons sitting at 20"
    Hopefully it will be stable enough but I can always tweak the plans before I start any cutting.
    Any feed back from you guys is much apreciated!


  2. #2

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    RE: Advanced 'SI' style Hydro.

    Feedback is. Get it done and sell me one.

    Cobus

  3. #3

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    RE: Advanced 'SI' style Hydro.

    Will get this one done anddialed inbefore I muck around with any other projects
    Finished off most of the plan yesterday, waiting to pick up a main deck sheet .
    Just found out no ink in printer too!lol
    So cant even print the smaller pieces for cutting till I fix that!

  4. #4

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    RE: Advanced 'SI' style Hydro.

    Better view of thelayout.


  5. #5

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    RE: Advanced 'SI' style Hydro.

    That looks fast even in wire frame format. Can not wait to see it real life. Any problem if I copy and paste that drawing? Please

    Cobus

  6. #6

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    RE: Advanced 'SI' style Hydro.

    No worries, doesnt look like I will be able to afford to start the build for a couple of weeks yet.

  7. #7

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    RE: Advanced 'SI' style Hydro.

    Have done a little so thought I had better update with some pics so far.
    Check fitting everything before going near the glue.
    Deck.


    Sponson main pieces, interlocked under deck braces.



    Tub sides.

  8. #8
    Rowboat's Avatar
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    RE: Advanced 'SI' style Hydro.

    Thats looking good M8. I like the curved sponson look.
    Boating is not a matter of life or deth, It is more important than that !!

  9. #9

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    RE: Advanced 'SI' style Hydro.

    Cheers mate!
    Have a few more bits to cut/sand then Ican start thinking about glueing.
    Have changed the ride surface angle as the original sponson angle was a bit deep.

  10. #10

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    RE: Advanced 'SI' style Hydro.

    Sponson ribs are done just have to cut the centres out.


  11. #11

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    RE: Advanced 'SI' style Hydro.



    Underdeck braces are glued down, finished glueing one of the sponsons minus the ride surface sheet. Will glue that on once I seal the inside.



     


  12. #12

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    RE: Advanced 'SI' style Hydro.



    Well the sponsons and tub are now sealed inside.
    I also used some 1" cloth tape to reinforce the joins, the transom is double layered to beef it up a bit.





  13. #13

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    RE: Advanced 'SI' style Hydro.



    Sponsons and tub are closed up and have some sanding to finish before hitting it with some resin.
    I left slight overhangs on the rear of all the ride surfaces as well.





  14. #14

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    RE: Advanced 'SI' style Hydro.



    The powerplant, 32cc Mac motor with raised compression and corrected port timing.




  15. #15

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    RE: Advanced 'SI' style Hydro.

    Looks bad dude , but i think its going to be unstable in front at 50 + mph , i would give the top a stealth design and bring it clear to the rear of it increasing hieght as it gets to the rear and finish with a tail to stabalize it , dude this would help keep the nose down prevent it from wanting to dance on its sponces at 50 mph + , the air flow would force it to stay stable ,  just picture it in a wind tunnel with your minds eye. 

  16. #16

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    RE: Advanced 'SI' style Hydro.

    I understand what you are saying, however the 'SI' style hydro's seem to do fine.
    The under deck braces will also slightly increase the the distance the airflow has to travel giving a 'very tiny' upside down wing effect on the front.
    The added bonus with airboats is you can also trim the engine angle to keep the front down at higher speeds, trimming the engine atitude has a far greater effect on how the hull rides when under power. JMO.
    If all else fails I do have plenty of carving foam in the shed to do something similar to what your saying!
    Thanks for your input and ideas, I will definately keep them in mind once its ready for first tests!

  17. #17

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    RE: Advanced 'SI' style Hydro.

    I see I had been a bit slack with the updates for this one, I have been on to other re-builds etc. but now that I have resumed this project I better add something for you guys!

    Older pic. of it sitting together.


    Outside sealed with resin.


    Highfilling the ride surfaces for sanding.


    Starting the engine stand.


    Cutouts to lighten it up.





  18. #18

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    RE: Advanced 'SI' style Hydro.

    Engine brackets are done, bolted it together with the crank case to sit it on the hull for a couple more pics. for you guys!  


  19. #19

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    RE: Advanced 'SI' style Hydro.

    Nice engine mounts - already looks fast.

  20. #20

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    RE: Advanced 'SI' style Hydro.

    Cheers mate, still a bit to do yet but its getting there!

  21. #21
    1QwkSport2.5r's Avatar
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    RE: Advanced 'SI' style Hydro.


    ORIGINAL: Ozpulse

    Cheers mate, still a bit to do yet but its getting there!*
    I agree with Dadkins. Looking good!

    I actually dug my SI copy 3-pointer off the shelf to rebuild it. These 3-pointers just look fast sitting there. I'm looking forward to the videos!
    GlowHead Brotherhood #3
    I don't need the Internet, my wife knows everything.


  22. #22

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    RE: Advanced 'SI' style Hydro.

    Thanks buddy, just hope it stays on the water long enough on the first runs to get it dialled in properly!

  23. #23

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    RE: Advanced 'SI' style Hydro.

    The cockpit will look a little something like this!


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