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  1. #251
    dicko's Avatar
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    RE: Gas Jet Boaters

    Dana,

    You can weld a flat plate to the bottom of the rollcage & drill 2 holes in each plate, then mount some wood to the inside of the chine you can screw it straight to the wood. that way it can be easily removed for maintenance etc. This is the way Craig does/did his on the swashdrive units, & the way I intend to build mine (although I'm planning on using carbon fibre for the rollcage).

    The answer is always more power.

  2. #252
    dicko's Avatar
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    RE: Gas Jet Boaters

    Here's a pic with the mount circled in red.

    The pic is from the forbidden site.
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    The answer is always more power.

  3. #253
    Scott Schneider's Avatar
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    RE: Gas Jet Boaters

    ORIGINAL: dicko

    Here's a pic with the mount circled in red.

    The pic is from the forbidden site.
    Header style looks quite familiar, but really loooong IMO
    Agree on roll cage mount, needs to be attached to the stringers and not on the hull.
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    Love the Hobby, Hate the Politics .....
    Home of MOTORHEADS RC Racing Engines.

  4. #254
    dicko's Avatar
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    RE: Gas Jet Boaters

    I'm not sure who's boat that pic is from, Craig has a short header set up similar to the one you have shown, except his goes back across the boat at a 45* angle. I've been looking into the outboard pipe setups as a basis for design for what I want to do. Some of the Baja ones could also be made to fit as well I think. that is a way down the line yet though.

    4 weeks & I'll be back in Adelaide with all my tools & my shed. Then the build will begin. I'm looking forward to it.
    The answer is always more power.

  5. #255

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    RE: Gas Jet Boaters

    hi guys.
    boats looking good Dana.
    I mounted another set of stringers along the chine and bolted the cage to that. I also mounted some blocks up at the deck for extra rigidity. before i bolted it to the deck i broke it out of the bottom. it was only 3mm wood glued in so should of been stronger i guess but it hasn't moved a mil since
    As for the header im using it is a bh hanson, would be nice to get one a little bit shorter.

    first stage of my new roll cage is going together just need to get some more tubing.
    Its 3/8" copper tubing that will be silver soldered together

    which is this forbidden site that you speak of (just in case im missing out on something) PM me if you have to

    cheers
    steve
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    Infinity RC
    1/4 scale jet boats

  6. #256

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    RE: Gas Jet Boaters

    where are the peeps here? it's been so quiet for awhile..

    guys, got a question? i'm looking for a jetdrive for a jetski hull measured 40 inches by 15 1/2 inches, i'm planning of using electric motor... any info. is appreciated.

    ww
    losi,warhead,dirtbike,,HTB360-2 ,HS Dumas,Nitro hammer, H&M Tunnnel,hydrofoamie,nomadio sensor,cat31,OB SW36

  7. #257
    Scott Schneider's Avatar
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    RE: Gas Jet Boaters


    ORIGINAL: wave waker

    where are the peeps here? it's been so quiet for awhile..

    guys, got a question? i'm looking for a jetdrive for a jetski hull measured 40 inches by 15 1/2 inches, i'm planning of using electric motor... any info. is appreciated.

    ww
    GRAUPNER
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  8. #258

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    RE: Gas Jet Boaters

    Correct me if i'm wrong but i think most people play with the jet boats once racing is finished Wavemaker, Graupner (as scott said) or kehlrer may be able to do a unit you wish.

  9. #259
    Scott Schneider's Avatar
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    RE: Gas Jet Boaters


    ORIGINAL: mickieb49

    Β*Correct me if i'm wrong but i think most people play with the jet boats once racing is finishedΒ* Wavemaker, Β* Graupner (as scott said) or kehlrer Β* may be able to do a unit you wish.
    Have taken mine sense finished to a couple races, Run before and after which usually draws a pretty good crowd .... giggles all around with many a clapping hand and odd sounds from the crowd as the boat does it's flips and flat spins.
    Waiting on two other guys I race with to get theres built, they too purchased Davette hulls but had to use Graupner drives. The rigging of the engine too pump connection being a trouble spot for them currently.
    Love the Hobby, Hate the Politics .....
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  10. #260
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    RE: Gas Jet Boaters


    ORIGINAL: Scott Schneider
    The rigging of the engine too pump connection being a trouble spot for them currently.
    1 Short piece of bar-stock (Ø1/2") threaded M6 > 1/4" ..

    1 Short piece of bar-stock (Ø1/2") Flat 8mm > 1/4" ..

    Schort piece of 1/4"flexshaft inbetween ... what's so difficult about that ?

    OK ... let them buy my engine > jet-pump couplers.

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  11. #261
    Scott Schneider's Avatar
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    RE: Gas Jet Boaters


    ORIGINAL: HendricX


    ORIGINAL: Scott Schneider
    The rigging of the engine too pump connection being a trouble spot for them currently.
    1 Short piece of bar-stock (Ø1/2'') threaded M6 > 1/4'' ..

    1 Short piece of bar-stock (Ø1/2'') Flat 8mm > 1/4'' ..

    Schort piece of 1/4''flexshaft inbetween ... what's so difficult about that ?

    OK ... let them buy my engine > jet-pump couplers.

    There doing it and not me
    Love the Hobby, Hate the Politics .....
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  12. #262

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    RE: Gas Jet Boaters

    Local company is selling this coupling for quite cheap
    http://www1.jaycar.co.nz/productView...T&SUBCATID=726

    tap one end for the jetunit and a shaft on the other end.
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    Infinity RC
    1/4 scale jet boats

  13. #263

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    RE: Gas Jet Boaters

    any graupner jetdrive distributor here in USA?

    or how easy to order from HPM in new zealand to USA?

    thanks

    ww
    losi,warhead,dirtbike,,HTB360-2 ,HS Dumas,Nitro hammer, H&M Tunnnel,hydrofoamie,nomadio sensor,cat31,OB SW36

  14. #264

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    RE: Gas Jet Boaters

    I guess im lucky they are 15min down the road from me.

    Kim, Tony and Andrew are great people to deal with and ship all around the world all the time.
    I wouldn't hesitate to order from them if i couldnt walk into the shop

    cheers
    steve
    Infinity RC
    1/4 scale jet boats

  15. #265

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    RE: Gas Jet Boaters

    +1 hpm are great i have bought off them a few times
    owner www.rcinnovations.co.nz

  16. #266

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    RE: Gas Jet Boaters


    ORIGINAL: wave waker

    any graupner jetdrive distributor here in USA?

    or how easy to order from HPM in new zealand to USA?

    thanks

    ww
    you can get the drives from http://www.hobby-lobby.com/ there loc in nashville tn . but the last cuple i have gotton i have used http://www.cornwallmodelboats.co.uk/...upner_jet.html



    what graupner drive are they useing and haveing proplems with a engine to drive link ? is it the 2347 drive ?

  17. #267

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    RE: Gas Jet Boaters

    guys i am looking at getting a mhz Jet Power 3 Race unit !!

    looking to get some of your thoughts and reviews on them before i but it

    cheers guys

    aspire2008

  18. #268

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    RE: Gas Jet Boaters


    ORIGINAL: aussier6er

    guys i am looking at getting a mhz Jet Power 3 Race unit !!

    looking to get some of your thoughts and reviews on them before i but it

    cheers guys


    what i'm hearing is lots of problem ordering from mhz unless u'll get it from other store...no idea about the product...
    losi,warhead,dirtbike,,HTB360-2 ,HS Dumas,Nitro hammer, H&M Tunnnel,hydrofoamie,nomadio sensor,cat31,OB SW36

  19. #269
    dicko's Avatar
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    RE: Gas Jet Boaters

    I was Talking to George from Hobby Depot about this unit before I got my Swashdrive unit. They are currently not in production & out of stock. They were going to do another run of them soon if not in the process now. Give him a call & see if he has heard any more details.
    The answer is always more power.

  20. #270

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    RE: Gas Jet Boaters

    thanks dicko

    yeah i placed a order with george on saturday but i havent been advised it they are backordered ??

    if so looks like i will be waiting for one !!!
    aspire2008

  21. #271

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    RE: Gas Jet Boaters

    Well finally I've got this boat running . I'm using a dog bone universal joint . We'll see how long this will last . I'll take her out tomorrow morning and test out the KMB pump and keep my eye on the dog bone ). Here is a short video .
    http://rcuvideos.com/video/Jet-Sprint-Boat-Running
    DaVette Boats

  22. #272
    dicko's Avatar
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    RE: Gas Jet Boaters


    ORIGINAL: aussier6er

    thanks dicko

    yeah i placed a order with george on saturday but i havent been advised it they are backordered ??

    if so looks like i will be waiting for one !!!
    Did you ring George, or order it off his website? Last I spoke to him they were still on backorder.
    The answer is always more power.

  23. #273
    dicko's Avatar
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    RE: Gas Jet Boaters

    Dana,

    Looks good, I get to start building mine next week.

    I'm not sure about the pump you have, but I know with a Swashdrive unit you must run the pump wet when you test run the engine, otherwise the bushes overheat & wear out. If your pump is a bearing mounted unit you may be OK.

    Cheers
    Jason
    The answer is always more power.

  24. #274

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    RE: Gas Jet Boaters

    Yep , it's got a bearing . It didn't seem to hurt it at all running it out of the water .
    I took it to the pond today and I have to say I'm very impressed with that KMB pump . It pushed the boat no problem . It was like playing with a jet ski . To take a guess I would say 30 mph easily . I didn't get a video because I was by myself . Now I'll get it ready for a paint job , then we'll get some video .
    DaVette Boats

  25. #275

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    RE: Gas Jet Boaters

    I ran the little sprint boat pretty hard today to see how the dog bone would hold up under pressure . Well the dog bone universal joint did fine however I sheared the KMB jet pump drive shaft off . The shaft steps down from 1/4" to 5mm . That was the weak spot ( see photo ) Here is a short video of it running . http://rcuvideos.com/video/DaVette-Sprint-Boat . I'll make another boat and go with the Graupner Jet Pump .
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    DaVette Boats


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