R21 Hamilton Jet

andy21 · 15-01-2009, 08:52 PM

Just wondering if anyone has experimented with different drive options on an R21?

Supposing you had a spare 5 ltr V8 and gearbox, a minto hamilton jet drive and an R21 hull. What would you do??

Would an attempt to mix the 3 together be a complete waste of time from the start??

Has anything like this been done?

Cheers for any advice (or laughs)

Tony Davis · 15-01-2009, 11:06 PM

Quote:

Originally Posted by andy21

What would you do??

Stick em all on Ebay

Julian Higgs · 16-01-2009, 12:23 AM

Quote:

Originally Posted by andy21

Just wondering if anyone has experimented with different drive options on an R21?

Supposing you had a spare 5 ltr V8 and gearbox, a minto hamilton jet drive and an R21 hull. What would you do??

Would an attempt to mix the 3 together be a complete waste of time from the start??

Has anything like this been done?

Cheers for any advice (or laughs)

Andy. I notice that your occupation is not listed! Are you a butcher by any chance?!

andy21 · 16-01-2009, 08:58 AM

Quote:

Originally Posted by Julian Higgs

Andy. I notice that your occupation is not listed! Are you a butcher by any chance?!

No no. when butchers cut things up, they can still sell them on!

Any recomendations on a hull that would like this kind of drive?

I've seen a small fonda (i think) with a rover v8 jet drive on youtube... does it not look/sound fun??

http://www.youtube.com/watch?v=UuGj2Dn4-gc

formula69 · 16-01-2009, 04:48 PM

If you wanna put a jet drive in any boat its gonna need to have a pretty flat bottom to install the water intake and to work efficienty.

Even if you put a small block v8 and outdrive unit in a R21 your be lucky to hit 60mph.
If you want the sound of a v8 youll need to buy a boat that came out the factory that way. If you want a boat with a jet drive buy a seadoo.

Tommy

speedboats · 30-01-2009, 08:04 AM

Define a shallow vee...

We run a variable deadrise starting with 19* at the transom. It is important to get the lead in correct.

What model drive is it?

You won't need the gearbox, but what motor do you have and how much power is available?

Most Hamilton Jets will top out at around 65-70mph, unless you have an RX model.

If you want a purpose built hull for the jet I can always sent you one...

Tony Davis · 30-01-2009, 01:25 PM

Quote:

Originally Posted by andy21

I've seen a small fonda (i think) with a rover v8 jet drive on youtube... does it not look/sound fun??

I puta 16 Fonda together with a PP Jet and a Ford V6 in the early eighties, it wasn't a great success! Good fun though, and stopped ever so quick, just didn't go very fast, perhaps 40-45 mph at best.

NIC SURRY · 30-01-2009, 03:49 PM

On similar thoughts to this as nearly all car motor sport seam to use Bike engines to get a fantastic Power to weight ratio has anyone used a bike engine in a boat,I've seen a Hyabusa engined boat on U tube which sounded fantastic but not sure how it went,I know racing wise gearboxes would be an issue but it could be an interesting project-light weight 180 BHP from 1300cc in standard form,close ratio gearbox and 15,000 reliable revs with a wide power band,could have a sealed fresh water cooling(tiny Rad)using a jet drive would give you an easy reverse solution and the 6 speed gearbox might give you good acceleration and top speed.You can tel I'm bored at work hence this post-Nic

Rogue Wave · 31-01-2009, 01:23 AM

could always sell the jet drive to me!

Matt · 31-01-2009, 10:37 AM

Ello Stu! How's thing?

Cookee · 31-01-2009, 11:17 AM

Quote:

Originally Posted by NIC SURRY

On similar thoughts to this as nearly all car motor sport seam to use Bike engines to get a fantastic Power to weight ratio has anyone used a bike engine in a boat,I've seen a Hyabusa engined boat on U tube which sounded fantastic but not sure how it went,I know racing wise gearboxes would be an issue but it could be an interesting project-light weight 180 BHP from 1300cc in standard form,close ratio gearbox and 15,000 reliable revs with a wide power band,could have a sealed fresh water cooling(tiny Rad)using a jet drive would give you an easy reverse solution and the 6 speed gearbox might give you good acceleration and top speed.You can tel I'm bored at work hence this post-Nic

A lack of torque is the biggest problem with small capacity motors

Jon Fuller · 31-01-2009, 11:48 AM

I'd love to build a Busa powered 3B boat. wouldn't use a jet though, would build a wee custom surface drive. (though not of course a Bananashark one)

Homologation is the issue.

Foolish · 31-01-2009, 12:51 PM

Quote:

Originally Posted by Rogue Wave

could always sell the jet drive to me!

There was a guy selling a brand new Hamilton with all extras and fittings at the last southampton boat jumble, i have contact number and photos if you need one

Cookee · 31-01-2009, 05:20 PM

Quote:

Originally Posted by Jon Fuller

(though not of course a Bananashark one)

????

I thought you were going to call me - changed your mind?

Jon Fuller · 31-01-2009, 05:22 PM

Quote:

Originally Posted by Cookee

I thought you were going to call me - changed your mind?

Yes, you two timing bitch......It's over!

NIC SURRY · 31-01-2009, 06:36 PM

Quote:

Originally Posted by Jon Fuller

I'd love to build a Busa powered 3B boat. wouldn't use a jet though, would build a wee custom surface drive. (though not of course a Bananashark one)

Homologation is the issue.

the u tube vids (there's several) shows the Hyabusa boat with a surface drive,looks and sounds great-masive rooster,but it looks like no reverse,would the fact of having five or six gears not overcome the lack of torque,I know it would sound strange hearing a boat change gear but would be a novelty?If my XR2 ever blows it might be a thought,could even put two bike engines they weigh nothing

Jon Fuller · 31-01-2009, 06:40 PM

I don't think it would lack torque.

A B23 Busa would be a larf. And i'm sure getting round the reverse rule wouldn't be a problem.

Matt · 31-01-2009, 07:08 PM

Yeh. With the busa being popular in the 7 type replicas these days, there are a few gearboxes designed to provide reverse for the cars - remember a few articles about when they first started doing it.

Not sure on the config though - think they tend to keep the mcycle gearbox, which outputs into the reversing box, then driveshaft. So 6 forward & 6 reverse gears - or on yer boat, you can choose the prop direction to suite the course direction.

Rogue Wave · 01-02-2009, 12:58 PM

Quote:

Originally Posted by Matt

Ello Stu! How's thing?

Things are surprisingly good actually.

I'm getting plenty of proper work and I've found a very interesting and convenient location for a new skool.

All i need now is a bit on the side and the top end of my hearing back.

Hope things are well for you too!

jw. · 01-02-2009, 05:05 PM

Quote:

Originally Posted by Rogue Wave

All i need now is a bit on the side and the top end of my hearing back.

Yeh? And if you know who finds out, you'll soon be hearing a bit of sibilance.