powerskipper
Well-Known Member
Doing this
yes its yellow fin, I asked him just to make sure. /forums/images/graemlins/blush.gif
I saw I saw I saw
- Thread starter powerskipper
- Start date
Doing this
yes its yellow fin, I asked him just to make sure. /forums/images/graemlins/blush.gif
Major Catastrophe
Well-Known Member
What is Yellowfin? /forums/images/graemlins/laugh.gif
EDIT:
Okay, to be serious, Julie, what did YOU think of it?
EDIT:
Okay, to be serious, Julie, what did YOU think of it?
youngr
Member
Looks cool...
Nautical
Well-Known Member
New technology, don't ya just love it /forums/images/graemlins/grin.gif we now have three new propulsion systems and I hear topity secretity that there is a fourth in the pipe line.
What an exciting time to be in the boaty world, hardly a month goes by and something new is released, I can't remember a time in the last twenty five years there has been so many new developments in such a short space of time. Mans ingenuity is just a marvel to behold!
What an exciting time to be in the boaty world, hardly a month goes by and something new is released, I can't remember a time in the last twenty five years there has been so many new developments in such a short space of time. Mans ingenuity is just a marvel to behold!
bdsweeting
Well-Known Member
Wouldn't it have been easier and cheaper just to walk it down the pontoon?
Major Catastrophe
Well-Known Member
Looking at the 2nd photo closely, is it a twin screw, or is it called a fan?
tome
Well-Known Member
Great shots, cheers
It's a very interesting concept (yellowfin), but guess the challenge will be to make it reliable
It's a very interesting concept (yellowfin), but guess the challenge will be to make it reliable
DoubleVision
Well-Known Member
I`ll be very interested to see what the price is compared to IPS. If their claims are true I`d love to have the same performance with 50% of the power. Damn it no!--I want twice the performance with the same engines. /forums/images/graemlins/cool.gif By my calculations my old 42`s will give me 70 knots top speed and 4mpg at 60 knot cruising and I can sell the bow thruster /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif---well ok its good to fantasize once in a while /forums/images/graemlins/laugh.gif
powerskipper
Well-Known Member
If what they claim is true it will be a good drive system,
no marinizing of engines, use of smaller engines to produce the same power, and fuel savings.
The guy was just making the boat dance, it looked easy to handle , so would be fast to pick up and use.
I like the idea of it, What I would like to know, is there a fail safe if you loose the electrics , as it relies on them a lot .
they have an office at Saxon wharf , so if I have time next time I am down there I mite pop in and ask. /forums/images/graemlins/grin.gif
no marinizing of engines, use of smaller engines to produce the same power, and fuel savings.
The guy was just making the boat dance, it looked easy to handle , so would be fast to pick up and use.
I like the idea of it, What I would like to know, is there a fail safe if you loose the electrics , as it relies on them a lot .
they have an office at Saxon wharf , so if I have time next time I am down there I mite pop in and ask. /forums/images/graemlins/grin.gif
Tim777
Well-Known Member
Looks great, this should be the winner in terms of propulsion systems. When I worked for a commercial ferry company our ships had a similar system where the pitch of the props adjusted to give forward and reverse plus various stages of bite inbetween. So I know it should work. I hope the electronics will be robust, in some ways a multi lever mechanical system might be better if you could get your mind round how to operate it!
Andrew_Fanner
Well-Known Member
Looks very impressive.
mjf
Well-Known Member
You would think that it would fail safe by having the drives lock midships rather like the system i have which locks the rudders. This together with a fixed pitch on the blades so the whole kit then acts like a conventional shaft / fixed outdrive unit .
Are you sure it was yellow fin as I saw a very similar RIB last year doing what you photograph but with jets.
Doh - just looked athe pix again and it says Yellow fin - also the engine room is much smaller than the one i saw.....
Are you sure it was yellow fin as I saw a very similar RIB last year doing what you photograph but with jets.
Doh - just looked athe pix again and it says Yellow fin - also the engine room is much smaller than the one i saw.....
Major Catastrophe
Well-Known Member
Tim, there was a discussion on Yellowfin last week, if you click here, so my question to PowerSkipper was tongue in cheek.
According to the panel last week, it is doomed to fail because it won't work and boat makers won't change designs to accomodate it. My counter argument was that it would be great for the smaller boats and as Julie pointed out, you just need a standard - and presumably cheap - unmarinised diesel engine.
According to the panel last week, it is doomed to fail because it won't work and boat makers won't change designs to accomodate it. My counter argument was that it would be great for the smaller boats and as Julie pointed out, you just need a standard - and presumably cheap - unmarinised diesel engine.
sarabande
Well-Known Member
Umm; an "unmarinised diesel engine" ? So the engine sits cheerfully ashore ? Or does Yellowfin generate so much hot air that it keeps the engine perfectly dry ?
I think the power input requirements in operational mode are likely to be a constant, rather than a variable, as in other propulsion systems. That would make an ordinary vehicle or commercial engine a candidate for the power unit. It would still need some" marinisation" IMHO
I think the power input requirements in operational mode are likely to be a constant, rather than a variable, as in other propulsion systems. That would make an ordinary vehicle or commercial engine a candidate for the power unit. It would still need some" marinisation" IMHO
Major Catastrophe
Well-Known Member
[ QUOTE ]
It would still need some" marinisation" IMHO
[/ QUOTE ]
From hotribs.com <span style="color:blue">"A variable surface drive that is claimed to more than double drive efficiency, increase performance and control and all with significantly lower fuel consumption, emissions and noise. Designed to bolt onto inboard engines, diesel or petrol, and even to non-marinised engine units. </span>
This from a boatdesign forum:
<span style="color:blue"> They say it produces significant side thrust, making it unsuiatble for single installation. To overcome this they offer a dual output, single input unit.
</span>
Google Yellowfin VSD for lots of pages. I discovered that the drive doesn't actually go into the water, just the blade that is currently at the bottom of the hub.
It would still need some" marinisation" IMHO
[/ QUOTE ]
From hotribs.com <span style="color:blue">"A variable surface drive that is claimed to more than double drive efficiency, increase performance and control and all with significantly lower fuel consumption, emissions and noise. Designed to bolt onto inboard engines, diesel or petrol, and even to non-marinised engine units. </span>
This from a boatdesign forum:
<span style="color:blue"> They say it produces significant side thrust, making it unsuiatble for single installation. To overcome this they offer a dual output, single input unit.
</span>
Google Yellowfin VSD for lots of pages. I discovered that the drive doesn't actually go into the water, just the blade that is currently at the bottom of the hub.
PetterM
New Member
Doing this
yes its yellow fin, I asked him just to make sure. /forums/images/graemlins/blush.gif
Thanks, takes me back
Kawasaki
Well-Known Member
Takes me back too, Major Catastrophe'!
AndieMac
Well-Known Member
I was thinking the same Kwacka, is he still about in your area?
Kawasaki
Well-Known Member
Not seen for some time
Actually will make some enquiries
His name came up in ‘virtual’ conversation tother day
Back ASAP
Actually will make some enquiries
His name came up in ‘virtual’ conversation tother day
Back ASAP
Kawasaki
Well-Known Member
The Major is ‘doing ok’ was the report
Sold His house and rental property in Port Dinorwic
Plus His ‘Merry Fisher’
May still have His Rib
Did spend some time with relatives in Aus
Current location not indicated
No ‘major’ problems it seems!
report ends
Sold His house and rental property in Port Dinorwic
Plus His ‘Merry Fisher’
May still have His Rib
Did spend some time with relatives in Aus
Current location not indicated
No ‘major’ problems it seems!
report ends
