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My Jet Boat Build...

Old 11-24-2009, 06:38 AM
  #26  
martno1fan
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Default RE: My Jet Boat Build...

Very nice work ,looks like you know what your doing ,cant wait to see her when your finnished.Are you going to leave the strakes at the aft end on or grind em off?,just wondering if they will create too much lift mind you they might help as im asuming that rig is quite heavy ?.
Mart
Old 11-24-2009, 07:45 AM
  #27  
Body Guard
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Default RE: My Jet Boat Build...

Fantastic job on this project. Thanks for sharing.
Been involved with serious jetski racing and one of the things that we worked on was to ensure the jets stays hooked and different scoop gate was tried to maximise the jet pump for max. forward velocity of the hull.
Hope this help.

Old 11-24-2009, 11:20 AM
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Dockman
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Default RE: My Jet Boat Build...

Why are you using a water pump? Don't that nipple on the pump pump water?
Old 11-24-2009, 12:52 PM
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Default RE: My Jet Boat Build...

Nice work ryan
Old 11-25-2009, 01:56 AM
  #30  
da mad maori
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Default RE: My Jet Boat Build...


ORIGINAL: martno1fan

Very nice work ,looks like you know what your doing ,cant wait to see her when your finnished.Are you going to leave the strakes at the aft end on or grind em off?,just wondering if they will create too much lift mind you they might help as im asuming that rig is quite heavy ?.
Mart
most scale jet hulls of seen (only seen two lol) have the strakes right to the end so ill trust that.....

Dockman Date 11/24/2009 4:20 PM
Why are you using a water pump? Don't that nipple on the pump pump water?
i wont be using the pump.. ill leave that for the next project

Body Guard Date 11/24/2009 12:45 PM
Fantastic job on this project. Thanks for sharing.
Been involved with serious jetski racing and one of the things that we worked on was to ensure the jets stays hooked and different scoop gate was tried to maximise the jet pump for max. forward velocity of the hull.
Hope this help.
i think so?? LOL i think i know what ya mean... ill see how she flys then adjust from there... ill just be happy if it floats for now


Old 11-25-2009, 10:03 AM
  #31  
Dockman
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Default RE: My Jet Boat Build...


ORIGINAL: Body Guard

Fantastic job on this project. Thanks for sharing.
Been involved with serious jetski racing and one of the things that we worked on was to ensure the jets stays hooked and different scoop gate was tried to maximise the jet pump for max. forward velocity of the hull.
Hope this help.

Raced Jet boat for 10+ years 130+ mph every pass. We had bubbles in front of the intake to keep pump loaded and lifts boat. Water will follow are round edge making a bubble directs the water right into the intake and since water does not compress the water pushes up bubble. The problem is know just how far in front of the intake to put it and how big. To close to the intake and it shoots the water right on past the intake and to far away t don't reach the intake. To big of a bubble loads the intake to much. Bubble size and ocation has to match the horse power.
Old 12-20-2009, 04:10 AM
  #32  
da mad maori
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Default RE: My Jet Boat Build...

its been a while




so i thought i would finish off the bottom of the hull

alittle bit of resin then tiny smudge of body filler, ALOT of sanding then a touch of white primer....




next is to "dummy" mount jet and engine to get the engine mounts near right
then remove them and glue deck back on

Old 12-20-2009, 04:12 AM
  #33  
da mad maori
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Default RE: My Jet Boat Build...

was out bashing the 5B today and i was telling a fellow baja/boater about the shaft for the jet unit
and he gave me a CVD

it was a Skunkworxs, 4x strong than anything on the market, ultra indestructable, whizz bang CVD drive shaft!!!!!

........it was destroyed it in one bash (lets hear it for manufactures testing procedures...hip hip.....) anyways so he gave it to me (ok for what im doing)

this is the damage caused in a stock cy26cc 5T


put it in the lathe and cleaned up the edge and shortened the shaft





made an adapter to fit the zen pum clutch bracket



a grub screw will hold it in


sitting in the boat




will be in the mother land of New Zealand this weds for 2 weeks so ill be out of rc action
apart from meeting up with the NZ large scale crowd in Taupo

HE OH WAI HE!!!!!
Old 12-20-2009, 06:18 PM
  #34  
Scott Schneider
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Default RE: My Jet Boat Build...

Think engine needs to be MUCH closer to pump ... you want a CG on the squirt hulls to be @ 25-27%
* here a conversion I did a few years ago.
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Old 01-12-2010, 04:59 AM
  #35  
da mad maori
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Default RE: My Jet Boat Build...

my mounts arrived today yeppy ;D
AND a cool change came through so it out to the garage first time since xmas eve!!!!


MOUNT KIT


FRONT ENGINE MOUNT ON


REAR ENGINE MOUNT ON


DISCOVERING THE FRONT MOUNT WAS UPSIDE DOWN, RE-ATTACHED RIGHT SIDE UP


AFTER ALOT OF PISSING AROUND MEASURING, DRILLING, FINDING LONGER BOLTS, ETC SHES IN!!!






TAPPING THE HOLE FOR THE DRIVE CUP GRUB SCREW RETAINER


RE-INSTALLING THE DRIVE CUP CARRIER


ENGINE POSITION take 1

Old 01-12-2010, 05:01 AM
  #36  
da mad maori
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Default RE: My Jet Boat Build...

i have some question for yas

QUESTION 1

what are these two tabs for



QUESTION 2

i need some suggestions on pipe placement... i know alot of race boats have there pipes crossing over to even up weight and have half the pipe sticking out the top/back

i want the pipe hiding inside the hull possible only sticking out the transom alittle... to do this requires the pipe to run down the side of the hull (on the inside) what is commonly used to counter weight this??
Old 01-12-2010, 09:48 AM
  #37  
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Default RE: My Jet Boat Build...

The tabs are for a belcrank type throttle setup,you can also use a cable setup if you prefer.By the way i think those mounts are anodized silver so be sure you use a grounding strap for the motor or remove some anodizing where needed.
Mart
Old 01-12-2010, 10:21 AM
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Nosedragger
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Default RE: My Jet Boat Build...

i have some question for yas

QUESTION 1

what are these two tabs for
throttle linkage you have the mount on upside down
Old 01-12-2010, 11:28 AM
  #39  
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Default RE: My Jet Boat Build...

ORIGINAL: Nosedragger

i have some question for yas

QUESTION 1

what are these two tabs for
throttle linkage you have the mount on upside down
Yea well spotted it is upside down in the hull but in a cpl of the other pics its on the right way up lol.
Old 01-12-2010, 06:10 PM
  #40  
da mad maori
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Default RE: My Jet Boat Build...

yeah it is upsidedown lol the engine doesnt want to be on an angle like prop boats so i had to "improvise"

cool so those tabs arent that important cheers guys
Old 01-12-2010, 10:37 PM
  #41  
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Default RE: My Jet Boat Build...

mill them off and use a cabe
Old 03-11-2010, 01:50 AM
  #42  
da mad maori
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Default RE: My Jet Boat Build...

i guess this is due for an update

did a bit of work on the linkages today... i decided to put the radio box infront of the engine simply for room...
using control "arms" would bave to be too long and arkward so im using cables....
they are stainless steel motorbike throttle cable which i silver soldered an m3 bolt on the end for screwing into the ball socket so i could attach to the nozzle linkages..

wow alot of work......

anyhoo heres a quick vid of it moving

http://www.youtube.com/watch?v=eolBPOroKy0
Old 03-11-2010, 04:44 AM
  #43  
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Default RE: My Jet Boat Build...

Looks good though I think you might be missing a lot of control by not having any adjustment over the reverse bucket. My radio allows full servo movement of the bucket that allows it to be in any position from full forward to full reverse - affords a lot more control - especially being able to hit neutral.

It is an old clip and way too short - but you get the idea.
[youtube]http://www.youtube.com/watch?v=3CGOov0z_Dw[/youtube]
Old 03-11-2010, 04:52 AM
  #44  
da mad maori
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Default RE: My Jet Boat Build...

yeah i would like that but the 3pm only has this way-that way lol unless there's something i can adjust in the radio?? i can adjust end points , curves and such but i dont think itll have proportional control...
Old 08-13-2010, 02:29 PM
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Default RE: My Jet Boat Build...

update ?????
Old 08-23-2015, 07:41 AM
  #46  
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Default

Originally Posted by Dockman View Post
Raced Jet boat for 10+ years 130+ mph every pass. We had bubbles in front of the intake to keep pump loaded and lifts boat. Water will follow are round edge making a bubble directs the water right into the intake and since water does not compress the water pushes up bubble. The problem is know just how far in front of the intake to put it and how big. To close to the intake and it shoots the water right on past the intake and to far away t don't reach the intake. To big of a bubble loads the intake to much. Bubble size and ocation has to match the horse power.
Hi Dockman I know this a old post but what is bubble you are taking about.

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