The beginning of a twin

Discussion in 'Outrigger Hydroplane Forum' started by dr gary turner, Feb 25, 2019.

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  1. Feb 25, 2019 #1

    dr gary turner

    dr gary turner

    dr gary turner

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    Sides: Carbon fiber foam carbon fiber foam 1/64 ply “sandwich “

    Bulk heads: 1/32 plywood foam 1/32 plywood foam 1/32 plywood sandwich

    All joints are mitered

    SST/Mark Bullard building technique.  A very strong light twin.

    The twin is an SST XP.  KNOW AS THE ALIEN

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  2. Feb 25, 2019 #2

    ALLAN YUEN

    ALLAN YUEN

    ALLAN YUEN

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    Look good light weight C/F tub

    what size of long tub? 

    what about sponsons?
     
  3. Feb 25, 2019 #3

    charles siler

    charles siler

    charles siler

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    Nice start boc :rolleyes: me like!!!
     
  4. Feb 25, 2019 #4

    Andy Brown

    Andy Brown

    Andy Brown

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    Nice work Doc!  Do I spy an OPS 80 on the work bench?
     
  5. Feb 25, 2019 #5

    dr gary turner

    dr gary turner

    dr gary turner

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    No yes.  On of the MISSISSIPPI BOYS needs to have Mark make a head button for the motor.  Had a 60 head button in it

    Allen, the tub is 42 in long and 7.5 in wide

    Andy, the construction technique is Mark Bullard’s 

    Sponsons are underway 

    foam1/16 ply in the middle and more foam

    Sponson pattern will be cut out of plexiglass 

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  6. Feb 25, 2019 #6

    Terry Keeley

    Terry Keeley

    Terry Keeley

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    Toronto, Canada, eh!
  7. Feb 26, 2019 #7

    ALLAN YUEN

    ALLAN YUEN

    ALLAN YUEN

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    Is Sponsons use JAE ? Or SST?  And puts shingles or flat bottom ? 
     
  8. Feb 26, 2019 #8

    dr gary turner

    dr gary turner

    dr gary turner

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    XP sponsons.  JAE characteristics

    No shingles on XP
     
  9. Feb 26, 2019 #9

    ALLAN YUEN

    ALLAN YUEN

    ALLAN YUEN

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    Very interesting anyway

    What kind of engines will you plan install? 
     
  10. Feb 26, 2019 #10

    dr gary turner

    dr gary turner

    dr gary turner

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    Mod CMB 101
     
  11. Feb 27, 2019 #11

    Duke Mordja

    Duke Mordja

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    Doc,

    What adhesive for the sandwiches?    Looking good.

    Duke
     
    Last edited by a moderator: Feb 27, 2019
  12. Feb 27, 2019 #12

    dr gary turner

    dr gary turner

    dr gary turner

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    Tub, CA. Super strong bond

    Sponson, Maas 2 part epoxy slow cure
     
  13. Feb 27, 2019 #13

    dr gary turner

    dr gary turner

    dr gary turner

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    The plywood was PRE SEALED BEFORE assembly with Total Boat PENETRATING EPOXY. Allowed to dry, sanded 320 assembled and is ready for PPG CLEAR then paint PPG SINGLE STAGE
     
  14. Feb 27, 2019 #14

    PaulHail

    PaulHail

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    Looks good doc, I like the composite sandwich construction.
     
  15. Feb 27, 2019 #15

    dr gary turner

    dr gary turner

    dr gary turner

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    Thanks

    The wood in the middle of the sponson is to prevent the sponson from fracturing between the boom/sponson tubes

    I had that happen on my 101 single JAE racing gas hydros at Voodoo about a year ago. Water was rough.
     
  16. Feb 28, 2019 #16

    TomGracey

    TomGracey

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    Like the tub fixture
     
    Last edited by a moderator: Mar 1, 2019
  17. Mar 1, 2019 #17

    Tom Foley

    Tom Foley

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    Great stuff !
     
  18. Mar 1, 2019 #18

    Joe Wiebelhaus

    Joe Wiebelhaus

    Joe Wiebelhaus

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    Why ?
     
  19. Mar 1, 2019 #19

    TomGracey

    TomGracey

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    Oppp's I meant LIKE the tub fixture
     
    Last edited by a moderator: Mar 1, 2019
  20. Mar 1, 2019 #20

    dr gary turner

    dr gary turner

    dr gary turner

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    Sponsons are born

    The plexiglass template is held on to the sandwich with double stick tape then cut out on the bandsaw

    They are then sanded to a perfect match

    Sheeting is all that is left

    Quick and easy way to build sponsons 

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