1/4 SCALE JET SPRINT BUILD
09-26-2008, 04:16 PM
#26
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RE: 1/4 SCALE JET SPRINT BUILD
ORIGINAL: infinityteg
I saw the listing for that on trade me some time ago
looking forward to see how it all goes.
i also had touble finding jet boat hulls when building mine. I am half way through the plug for a 1/4 scale jet sprint with plan to sell them but as some one else is closer there isnt going to be much point to finish it. demand isnt too high to have two manufactures of them.
hers a couple of pics of mine
I saw the listing for that on trade me some time ago
looking forward to see how it all goes.
i also had touble finding jet boat hulls when building mine. I am half way through the plug for a 1/4 scale jet sprint with plan to sell them but as some one else is closer there isnt going to be much point to finish it. demand isnt too high to have two manufactures of them.
hers a couple of pics of mine
i hope to start the moulding next week but hulls are going to prob be a month or two away yet
what pump is that you are runnng ??
if your down this way hamilton or morrinsville send me a pm if ya want to come have a look
bentley
09-27-2008, 01:54 AM
#27
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RE: 1/4 SCALE JET SPRINT BUILD
yep its all wood.
just down loaded 50 odd photos from the net of the white pointer jet sprint boats that are made in gisborne and tried as best as i could to model it. thanks for the compliments on the paint. it was the first time i used a spray gun before there are a few little spots i can notice but most others dont.
the jet im using is from swashdrive. I have just taken the engine out of it at the moment for my thunderbolt build but hopefully have another soon. would love to come check it out some time. might have to wait till its running and ive got my new engine and can make a day of it at a pond
cheers
steve
just down loaded 50 odd photos from the net of the white pointer jet sprint boats that are made in gisborne and tried as best as i could to model it. thanks for the compliments on the paint. it was the first time i used a spray gun before there are a few little spots i can notice but most others dont.
the jet im using is from swashdrive. I have just taken the engine out of it at the moment for my thunderbolt build but hopefully have another soon. would love to come check it out some time. might have to wait till its running and ive got my new engine and can make a day of it at a pond
cheers
steve
09-27-2008, 02:04 AM
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RE: 1/4 SCALE JET SPRINT BUILD
you did a geat job of hull have you got a photo of the bottom of the hull ????
thought it looked like a swishdrive unit ....i thought they stoped making them ...
im will make another hull for my self and run a zen and a graupner jet unit from high performance models and see how it gos
will be great to see your boat running and cant wait to get mine going allso
thought it looked like a swishdrive unit ....i thought they stoped making them ...
im will make another hull for my self and run a zen and a graupner jet unit from high performance models and see how it gos
will be great to see your boat running and cant wait to get mine going allso
09-27-2008, 07:05 PM
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RE: 1/4 SCALE JET SPRINT BUILD
i will have to get a photo of the bottom for you tomorrow. the camera batteies are flat.
i can tell you a litle bt about the bottom though.
it is a constant deadrise of 23 degrees. it doesnt have any planing strakes but it does have the chine strakes on the sides. the delta pad is rectangular the size of the jet unit foot print and then the triangle part goes 100mm past the mid length of the hull. it will all make sense when i post a pic for you.
from looking at the swashdrive website craig has got some more jet units in stock now. which reminds me i have to get one of his drive shafts from him. that is the biggest problem im having with it. will keep you posted.
cheers
steve
i can tell you a litle bt about the bottom though.
it is a constant deadrise of 23 degrees. it doesnt have any planing strakes but it does have the chine strakes on the sides. the delta pad is rectangular the size of the jet unit foot print and then the triangle part goes 100mm past the mid length of the hull. it will all make sense when i post a pic for you.
from looking at the swashdrive website craig has got some more jet units in stock now. which reminds me i have to get one of his drive shafts from him. that is the biggest problem im having with it. will keep you posted.
cheers
steve
11-08-2008, 05:14 PM
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RE: 1/4 SCALE JET SPRINT BUILD
well guys i had a change of mind im not going to take a mould off the hull now i just dont have the time to do it so will be using the hull as it is and fit up all every thing in it and see how it gos will keep ya posted ..
11-14-2008, 01:05 AM
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RE: 1/4 SCALE JET SPRINT BUILD
ORIGINAL: da mad maori
wow alota works gone into making that!!!!!
good ole Kiwi inginuity
wow alota works gone into making that!!!!!
good ole Kiwi inginuity
11-14-2008, 02:23 AM
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RE: 1/4 SCALE JET SPRINT BUILD
yeah its a work of art inside and out just dropd off the tail housing and shaft to get a bush put in the housing becouse it never had one i dotn think it was quite finished and needs flas milling on the shaft for grub screws to tighten up on the impellers...
11-16-2008, 04:17 AM
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RE: 1/4 SCALE JET SPRINT BUILD
Heah Bentley
Awesome looking jet you got there ! and with countless amount of hrs would have gone into building it !
Looks more like a scott jet than a Hamilton jet.
But i can tell you from past exsperiances that multi stagged jets in this scale does not work so well.
Sure it will load the motor more but will not nessasarly flow any more water, no matter how much Hp you have.
You might also consider running an inlet grate as the smallest stone will be deadly with 3 stages.
I'm still making jets, here for the long haul Bro
Regards
Craig
Awesome looking jet you got there ! and with countless amount of hrs would have gone into building it !
Looks more like a scott jet than a Hamilton jet.
But i can tell you from past exsperiances that multi stagged jets in this scale does not work so well.
Sure it will load the motor more but will not nessasarly flow any more water, no matter how much Hp you have.
You might also consider running an inlet grate as the smallest stone will be deadly with 3 stages.
I'm still making jets, here for the long haul Bro
Regards
Craig
11-16-2008, 04:26 AM
#39
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RE: 1/4 SCALE JET SPRINT BUILD
hi craig
glad to hear your still around. youll have to post some of your projects for us too see. there just isnt enough jet stuff around any more with yours and peterss forums gone.
glad to hear your still around. youll have to post some of your projects for us too see. there just isnt enough jet stuff around any more with yours and peterss forums gone.
11-16-2008, 07:22 AM
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RE: 1/4 SCALE JET SPRINT BUILD
ORIGINAL: da mad maori
wow alota works gone into making that!!!!!
good ole Kiwi inginuity
wow alota works gone into making that!!!!!
good ole Kiwi inginuity
11-16-2008, 03:09 PM
#42
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RE: 1/4 SCALE JET SPRINT BUILD
ORIGINAL: swashdrive
Heah Bentley
Awesome looking jet you got there ! and with countless amount of hrs would have gone into building it !
Looks more like a scott jet than a Hamilton jet.
But i can tell you from past exsperiances that multi stagged jets in this scale does not work so well.
Sure it will load the motor more but will not nessasarly flow any more water, no matter how much Hp you have.
You might also consider running an inlet grate as the smallest stone will be deadly with 3 stages.
I'm still making jets, here for the long haul Bro
Regards
Craig
Heah Bentley
Awesome looking jet you got there ! and with countless amount of hrs would have gone into building it !
Looks more like a scott jet than a Hamilton jet.
But i can tell you from past exsperiances that multi stagged jets in this scale does not work so well.
Sure it will load the motor more but will not nessasarly flow any more water, no matter how much Hp you have.
You might also consider running an inlet grate as the smallest stone will be deadly with 3 stages.
I'm still making jets, here for the long haul Bro
Regards
Craig
if this is no good as a 3 stage i can allways take a stage off and try it again till it works the way it should ...
i have a inlet grate for it i think its in one of the first photos
11-16-2008, 03:11 PM
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RE: 1/4 SCALE JET SPRINT BUILD
ORIGINAL: martno1fan
probably made in taiwan like everything else nowadays
ORIGINAL: da mad maori
wow alota works gone into making that!!!!!
good ole Kiwi inginuity
wow alota works gone into making that!!!!!
good ole Kiwi inginuity
11-16-2008, 05:29 PM
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RE: 1/4 SCALE JET SPRINT BUILD
yeah working on it mart then hulls ready i still got a few things to do to the jet unit as it wasnt quite finished
should be going this time next year
should be going this time next year
11-16-2008, 05:39 PM
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RE: 1/4 SCALE JET SPRINT BUILD
ORIGINAL: bentley marshall
yeah working on it mart then hulls ready i still got a few things to do to the jet unit as it wasnt quite finished
should be going this time next year
yeah working on it mart then hulls ready i still got a few things to do to the jet unit as it wasnt quite finished
should be going this time next year
mart
11-16-2008, 05:45 PM
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RE: 1/4 SCALE JET SPRINT BUILD
yeah got a lot on at the moment mart and a baby due in march so i will have even less time ......
the jet needed a bush in the tail housing and some flats milled into the shaft to locate the impellers on to
the jet needed a bush in the tail housing and some flats milled into the shaft to locate the impellers on to
11-17-2008, 05:08 AM
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RE: 1/4 SCALE JET SPRINT BUILD
Heah Bentley
The rear bushing in the jet, i use a product called Thordon, which is a special plastic made for water lubricated bearings / shafts (cuttless Bearings) Just need to broach some keyway like grooves on running surface to let the water flow through and it'll last forever.
It's crucial to run a good quality cuttless bearing cause if clearance develops in the rear bearing the impellors will rub on the wear ring, chatter and scweel like a stuck pig. I know one of the other jet manufactures uses a precision bearing in the rear of the jet and in a dirty water enviroment doesn't last long at all.
Also you'll need to make sure it has a good seal in the front bearing pack, these lil jets develop heaps of suction under load and if the seal isn't good it'll suck air through the bearings and airrate the flow of water enteing the impellors. Worse still under de-acceleration the inlet with develop positive pressure and can force water through the front bearings, wrecking them. I use a mechanical seal just like the big jets use !
Regards
Craig
The rear bushing in the jet, i use a product called Thordon, which is a special plastic made for water lubricated bearings / shafts (cuttless Bearings) Just need to broach some keyway like grooves on running surface to let the water flow through and it'll last forever.
It's crucial to run a good quality cuttless bearing cause if clearance develops in the rear bearing the impellors will rub on the wear ring, chatter and scweel like a stuck pig. I know one of the other jet manufactures uses a precision bearing in the rear of the jet and in a dirty water enviroment doesn't last long at all.
Also you'll need to make sure it has a good seal in the front bearing pack, these lil jets develop heaps of suction under load and if the seal isn't good it'll suck air through the bearings and airrate the flow of water enteing the impellors. Worse still under de-acceleration the inlet with develop positive pressure and can force water through the front bearings, wrecking them. I use a mechanical seal just like the big jets use !
Regards
Craig