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nzjetboating.com Forums => Tech Library => Topic started by: daggs on July 21, 2013, 15:25:41 PM

Title: nozzle insert
Post by: daggs on July 21, 2013, 15:25:41 PM
im trying on here to find how to make a nozzle insert out of car bog I no there was a topic on here a while ago can any one help find it or tell me how churrr daggs
Title: Re: nozzle insert
Post by: johnmead on July 21, 2013, 18:03:52 PM
Hi Daggs, I did it to a single stage unit with gates on, on the beach at Glenduh Bay, [about 1979  C""] and it worked a treat, and stayed in place a lot longer than expected  b> Mixed bog on a lump of tin, and put in place with finger, shaped a ring around the nozzle, with a bit of taper on it to help water flow. From memory put about 6 or so mills around the entire nozzle. Let it set in the hot sun and then went back to water-skiing  ;D The idea was, if it restricted the nozzle too much, we'd file some of it out, but the first attempt was so good it just stayed that way, until I replaced the old single with a 2stage Colorado which I still have!!
Title: Re: nozzle insert
Post by: Paul on July 23, 2013, 16:28:48 PM
im trying on here to find how to make a nozzle insert out of car bog I no there was a topic on here a while ago can any one help find it or tell me how churrr daggs


http://www.nzjetboating.com/yabbse/index.php?topic=20104.msg164993#msg164993 (http://www.nzjetboating.com/yabbse/index.php?topic=20104.msg164993#msg164993)

 b>
Title: Re: nozzle insert
Post by: daggs on July 23, 2013, 21:30:29 PM
cheers for that I will give it ago see how I get on churrr daggs O0 ch>v
Title: Re: nozzle insert
Post by: callan FNQ on July 26, 2013, 12:59:28 PM
another way to make spare inserts is making a mould of the original nozzle using RTV silicone rubber
a 1kg pail costs about 60 bucks, make sure you mix the exact amount of catalyst with it.
youtube "mouldmaking with RTV silicone rubber "


having a flexible mould means you can make how ever many nozzles you want and turn them out to different diameters to make
tuning/ experimenting easier on the river. you can even make moulds of what ever jet part you want to modify to check before you butcher !
i used R180 epoxy resin to cast them with, any decent resin will do.
once youve found the right nozzle, turn your original out to suit and whack it in : )

Title: Re: nozzle insert
Post by: swifty on July 26, 2013, 20:39:33 PM
that's amazing! well done mr callan
Title: Re: nozzle insert
Post by: daggs on July 29, 2013, 06:26:43 AM
hi that a dam good idea but my nozzle has no insert to take a pattin off have you any spare ones that you have made chur daggs O0 ch>v
Title: Re: nozzle insert
Post by: callan FNQ on July 30, 2013, 13:04:24 PM
hi daggs,

I'm in australia mate,
arco or harris marine will be able to help you out with your first insert.
Title: Re: nozzle insert
Post by: Midjet on July 30, 2013, 22:38:13 PM
Where here in Aus can I buy RTV silicone rubberto make some molds?


Cheers Dan
Title: Re: nozzle insert
Post by: callan FNQ on July 31, 2013, 16:08:42 PM
hi dan,

dalchem or adelaid mould making supplies.
they also have translucent dies for epoxies. very cool stuff.

if you have a local FGI or fibreglass shop they also sell it.