What boat is this

[TWIN RIG]

Does anybody know what this is http://cgi.ebay.co.uk/POWER-BOAT-PRO...item19bbb54f4d

[boatnut]

Originally Posted by TWIN RIG

Does anybody know what this is http://cgi.ebay.co.uk/POWER-BOAT-PRO...item19bbb54f4d

looks like a tampered with ,marshan to me

[scarab racing]

Hi Twin Rig
I just asked the question about the props..?? on this same boat,
its a marshan 21 but with a lot of work and hull cutting, would be good to know the history and idea behind it.
All that electrics and water not a good thing.

[Jon Fuller]

Looks like something connected with the Yellowfin concept drive project to me. Maybe an early incarnation.

Or someone trying to emulate the Yellowfin? (badly)

Scand will know I'm sure.

Must be tight in the back there with twins, assuming it still has the stock Marshan beam.

I have to say, whilst it looks like a right dogs dinner in there rigging wise, It's nice to see someone doing something completely different.
It's oh-so-easy to just buy an OB and a hull like everyone else.

[Scand]

Hehe, never thought I would see that again. Had many hours of fun in that one.
We bought this from a yard in Warsaw, as a Marshan 19.6? with a 2.4 liter mec on the back.

It was to be our second test boat at Yellowfin. After problems controlling the running trim angle, we cut the front part of the hull of along the chine and lowered it and stuck it back on to create the step. It ran really nicely after that.
Before building the step we tried to fit a hydrofoil at approx 1/3 from the bow, that was a complete disaster, it generated a lot of lift, but in turns it tended to though the boat around.
We also fitted trim tabs on the front step as an experiment; I think they are still there. The hull as been hacked around a lot and it will need some serious work to get back into shape. Probably easier and better to build a new one.
Engines are cheap 1.5 liter industrial Peugeot without turbo about 45hp each, with dry exhaust, keel plate cooling, so not really marinsed.

It was filled with last generation data loggers and sensors, I think we data logged about 30 channels, so a lot of wiring in the days before CAN.
I designed and built the gearboxes to last a round 100 hours, as test units, I think have done around 250 hours now, so not much more life left in them.
Good project, learned a lot.

[littlenige]

Sweet looking boat - kind of Shead-ish with that nice raked 'screen'.

[Bob Webb]

However there is another aspect to yellowfin. This boat allegedly produced data that correlated a fin performance model to 0.01%; kinda weird seeing as it had no discernible torque measurement and little evidence of useful thrust measurement. I saw it run once and it overheated the control system in less than 15 minutes.
The highest GPS speed I ever saw from a yellowfin test boat was 41 knots and in one direction only, certainly not the 'well over 50 knots' you can find on the web.
The acceleration claims are also completely fiction, a normal sterndrive boat makes these drives look silly 'till full planing speed and then these is some advantage as you would expect from a surface drive.
There is a yellowfin patent here (the control side is written by someone with little understanding however..):
http://www.wipo.int/pctdb/en/wo.jsp?WO=2008032125
I'm named as second inventor but was not paid for any of this work although it was used to support the major shareholder anne duncan with her personal waterfront office she shared with her PA(1/4 of the building you see here):
http://www.yellowfin.com/location.asp
btw, this is no longer their trading office and has not been for well over a year despite the website claims.
Yellowfin have recently been bought by a financial investor I have heard. If this is true then the man involved is not shy of suing and I would be far from disappointed if this happened. If I had the funds I'd sue for false agreements and claims and (persistent) deception.
It is a great shame to see useful technology wrecked by personal greed. This could only have happened if investors and creditors had been lied to and for years. The company does not publish accounts... and not to protect the company value it would seem...
My personal perspective is that Ian and Anne Duncan should get their skulls smashed together. I have the 'technology 'and certainly moral justification if not pc legal. Bravado is one thing, this is very different.
I worked alongside Scand for over five years. He is a truly excellent engineer and also a highly valued personal friend. If anyone wants an excellent development engineer I cannot recommend higher (and I've worked in research at two top UK unis with scary big research budgets).
Hugo has also made comment here and he is a very fine and honourable guy.
Yellowfin technology could produce a useful product I believe but it will require realism and investment in technology development not to support lucrative hot air and pretension.
This this is the minimum I could could say. Avoid till they show something.
Hopefully I can find a way to point the new yellowfin owner to this post.

[Andy Edwards]

and that is it me fkn sr9 definatly aint gettin that shit ere did tony davis do the loom on that boat

[Bob Webb]

Andy,
I've found a direct way I hope to contact the new owner and am composing a duly respectful mail to him. He has the means to do some very good things in the marine industry but quite rightly expects a return on the investment. The original commercial investors had a very similar perspective.
If perhaps we can get some good engineers back on the project then it can be rescued. There were some very good engineers working on the project and the technology is not fundamentally flawed although some redesign is definitely required.
It is the totally (unbelievably..) unrealistic marketing potential and claimed capabilities of the technology that has caused the problems as a far as I can deduce (ok... know ha). The complete perspective of the venture needs some very big realism. I have posted my severe annoyance here for this reason.

I started doing work for yellowfin after this boat had 'expired' and don't know who did design or produce any of the control system. Scand I'm sure will know. I did however see the electronics schematic for the controller on this craft. It was analogue circuitry and all looked very fine to me as an early shot at a workable development system. The drive design had some major mechanical shortcomings which would imply the controller was somewhat paralysed at speed, I was told by those who were directly involved in the engineering at this time. OK, development has to go through this sometimes...

I have a fairly good idea of what has already been spent on this enterprise. Cannot see anyone getting much of a financial return given a realistic marketing scenario.

I certainly would not consider any involvement unless the md who caused this is duly dispatched and removed from any involvement and weightily advise all others to do the same. R&D funds are hard to come by. Sickening to see this nature of thing. I'd have been thrown out of academia for running any grant funded or commercial research contract in this way in very short time. Would not have bought myself a couple of houses in france in the duration or bought a large expensive car on the project after effing it up either... gggggrrrrrrr! (((((((((((
Bob