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nzjetboating.com Forums => Projects => Topic started by: jetstar on June 08, 2006, 09:44:38 AM

Title: 'Jetstar' with Hamilton Colorado Junior 1B
Post by: jetstar on June 08, 2006, 09:44:38 AM
Hi. I have just joined the forum in the hope that I can find help in restoring my boat. It is a C. 1969/70 Jetstar. It is based on a one-off design boat used by Sir Donald Campbell in his trials of 'Bluebird' before his tragic Water Speed record attempt on Coniston Water U.K. Before his death he developed a production version of this one off and launched it as 'Jetstar'. The boat uses a 4 cyl Ford Cortina 1600 GT Crossflow engine (originally developing approx 100bhp) to drive a Hamilton Colorado Junior 1B Jet unit. The engine fitted is I believe the original but I have had it rebuilt and it should now produce approx 120bhp. The jet unit also appears original although it is need of complete overhaul - hence my enquiry. I need to trace a source, (if one exists) of spares - such as bearings and seals, and if possible, a new impellor to replace the original one (rated at '60') which would be better suited to the engine power. If anyone out there is able to give any advice or help in obtaining the parts I need I would be extremely grateful. I would be ahappy to provide as much info as I can and digital pictures if necessary. Thanks in anticipation.
Title: Re: 'Jetstar' with Hamilton Colorado Junior 1B
Post by: Matthewf/Norbert/TuiDog on June 08, 2006, 10:08:48 AM
i presume you are in the UK?

the dollar is good for you, i suggest you contact harris marine (top right of this page) with unit spec, they can supply parts etc, or try shaun auto and jet boat services which is linked on the main page. they can get you the parts and export, with your dollar this should be a good deal..
Title: Re: 'Jetstar' with Hamilton Colorado Junior 1B
Post by: Polarkiwis on June 08, 2006, 10:34:02 AM
I would be ahappy to provide as much info as I can and digital pictures if necessary. Thanks in anticipation.

We love pics! Post some up of your boat please.

Cheers
Brian
Title: Re: 'Jetstar' with Hamilton Colorado Junior 1B
Post by: jet30mk1 on June 09, 2006, 09:41:09 AM
Hi Jetstar

suggest you try the impeller youve got first. It will be well suited to 1600cc reving high ( which i assume it does to get 120hp). If you put a 130 hp impeller in, you may not get the revs up high enough to get your power out and may be worse off. Try what youve got first before spending $$$$ sorry pounds!

and pics pleeeeese!

GlennC
Title: Re: 'Jetstar' with Hamilton Colorado Junior 1B
Post by: jetstar on June 14, 2006, 00:54:46 AM
Thanks for your responses. I will try the parts suppliers suggested. Meanwhile i am going to try to link some pics of the boat and bits for anyone who is interested.

Cheers

Andrew.
Title: Re: 'Jetstar' with Hamilton Colorado Junior 1B
Post by: jetstar on June 14, 2006, 01:21:42 AM
$ pics of my boat/various parts of the jet drive can be seen at the folowing site: http://www.flickr.com/photos/[email protected]/
Title: Re: 'Jetstar' with Hamilton Colorado Junior 1B
Post by: jet30mk1 on June 15, 2006, 23:57:51 PM
grrrrooovy little boat!!

GlennC
Title: Re: 'Jetstar' with Hamilton Colorado Junior 1B
Post by: wrongway2 on June 18, 2006, 22:08:14 PM
Some related history at this link.

http://www.fiberglassics.com/buehler/default.asp
Title: Re: 'Jetstar' with Hamilton Colorado Junior 1B
Post by: peterj on June 21, 2006, 04:18:51 AM
Nice looking boat.  What are the performance expectations?
Title: Re: 'Jetstar' with Hamilton Colorado Junior 1B
Post by: kiwifaulkner on June 21, 2006, 20:14:00 PM
Hi Jetstar

I have one of these boats upside down beside my workshop in Derbyshire awaiting its turn in the increasing line of 'projects' which take up my time (it lies somewhat behind the Jet 73 and the aeroplane that we have just started building!) 

Some history for you ... (which I guess you may know already).

Your Jetstar is a development of the original Jetstar 1, which was an idea conceived by the late Sir Donald Campbell for a safer alternative to the conventional prop driven powerboat - it had a design speed of 34 knots.  It was originally built of wood and used by Campbell as his daily run-about.  I believe it also had the first Dowty Hamilton unit (a single stage Colorado junior I think).

After Campbell's death in Bluebird attempting the water speed record, Leo Villa (his chief engineer and friend) produced a fibreglass version aimed at the family man for around ?850, and was filmed being demonstrated on a lake in Essex by Pathe News (you could probably track the clip down on the web if you tried).

The hull was designed and built by Peter Milne and the Bluebird Team.

The Jetstar was put into production by Bluebird Marine between 1970 and 1980 by Gordon Thurkettle (another member of the Campbell team), and about 100 of these boats were built during this time.   On demise of the company the moulds were sold on to BW Marine, Southwater, Horsham, Sussex who I believe are still in business.

My boat had a Ford 1600 crossflow - this is a versatile little motor and loads of parts available, however I would be impressed to see a combined 120bhp at the shaft and longevity as a boat motor.  I ripped the crossflow out and consigned it to the local tip ... I now have a half rebuilt 2.8L Cologne engine laying around somewhere to go back in.  The unit is a single stage colorado in need of a total rebuild.

There were some interesting 'features' on the boat I bought.  The hull had a completely sealed compartment in the bow - which of course was full of water.  The (fibreglass) fuel tank was also in the bow.  It would surprise me if the thing planed at all.

If I can be of help the please don't hesitate to get in touch.  I know of one other bloke in the UK with one of these boats and we did correspond until my Jet 73 rode into town ...
Title: Re: 'Jetstar' with Hamilton Colorado Junior 1B
Post by: alan on June 28, 2006, 22:27:00 PM
I worked with Gordon from 1970 to 1984 building the jetstars. The first boat was made of wood and powered by an Evinrude V4 75

hp power head driving a dowty hamilton jet through an oil cooled right angle drive gearbox designed by the Norris Brothers who had
designed both the Bluebird K7  boat and CN7 car for Donald Campbell with which he set both water and land speed records.
Bluebird Marine was funded by the Norris Brothers and Leo Villa was the general manager until he retired.
The first production Jetstar was a 4 seat boat with a flat windscreen and powered by a 1500cc ford as the x flow 1600 was not yet
available. The first 1600 used a mangoletsi marinisation with an oil cooler pipe through the sump.
1970 saw the deck change to give a wrapround windscreen. This boat became the jetstar 400.and very little changed from then on. A cheaper 2 seat version mainly just for skiing was called the jetstar 390. An alternative 2 litre BMW engine was offered giving
130 bhp. Changing the impellor to the coarse version gave 36 knots with an incredible amount of thrust - enough to easily pull up
2 deep water skiiers. Castoldi 04 jets were also used which raised the top speed to over 40 knots but with lower static thrust
for pulling up skiiers. We also produced a 17'  jetstar 520 which became the 525.This boat used the castoldi 05 jet,the most
common being the 3 litre ford v6.Incidentally Donald Campbell was never knighted.
Title: Re: 'Jetstar' with Hamilton Colorado Junior 1B
Post by: JR on June 28, 2006, 22:58:37 PM
Wow that was good reading ;D ;D ;D.. Cheers JR
Title: Re: 'Jetstar' with Hamilton Colorado Junior 1B
Post by: jetstar on July 03, 2006, 09:22:03 AM
Great feedback guys - thank you very much. Sorry I have been tardy in responding but my pc went bang. I have gathered a fair bit of history from the guy who now owns Doanld Campbell's original Jetstar. I had a ride in it on Windemere a couple of years ago when he took it to the classic motor boat club meet there. It is still in completely original condition having been in storage for many years. You can clearly see the genes in the design of mine.
I have just spent the weekend bead blasting the jet drive castings in anticipation of finding the required parts for the rebuilt. i have sent a parts list to Hamilton to see how many, if any of the original servicable parts are still available.
From the description it seems mine might be the 390 model. It has 2 proper seats but also two very small 'jump' seats - one either side of the engine cover - these being just cushions on the floor with a small squab. It does seem to be pretty original in a rather typical wide collar and flares 70's style!..
I too am dubious about 120hp from this engine... that is what the guy who rebuild it with new cam/carb told me it should make. Another guy I spoke to who used to ski behind one of these boats said the Cortina crossflow engine was v unreliable due to frequent overheating, because it had to be revved so high to get sufficient power to push the thing along at anything like decent speed. The rebuild of my engine includes a cam the profile of which is supposed to deliver the majority of the peak power from low down the rev range so hopefully it will be up to the job. i just need to fit the appropriate impeller... (??).
Title: Re: 'Jetstar' with Hamilton Colorado Junior 1B
Post by: New jet boater on September 19, 2016, 23:07:26 PM
Hi,
I think I've just identified my boat as a jet star 520.
Thanks.
Will research them.

Title: lanies rebuild we have the technology but we dont want to spend any money
Post by: MichaelFut on July 27, 2018, 11:15:48 AM
Mr. Racin..... Love the drop top I think that I detected an emergency brake lying on the ground under the passenger side front wheel in the top photo. Is that a factory option, or just an add on????

        GM
Title: Re: 'Jetstar' with Hamilton Colorado Junior 1B
Post by: steelo on July 27, 2018, 11:24:20 AM
OP may not even be around Michael. Post is 12 years old.
Title: 156" Ultimate River Boat URB
Post by: MichaelFut on September 03, 2018, 16:41:02 PM
Should I add new enemies with the old ones, of course into Ultimate Marathon?Poll ended at Aug 7th 15, 00:28Yes, add more enemies1

:) (https://www.sportzfuel.com/)
Title: 156" Ultimate River Boat URB
Post by: MichaelFut on September 03, 2018, 16:43:41 PM
Should I add new enemies with the old ones, of course into Ultimate Marathon?Poll ended at Aug 7th 15, 00:28Yes, add more enemies1

:) (https://www.sportzfuel.com/)