propulsion system design...............

[ruminame]

i am having some difficulties in propulsion system & rudder design for a catamaran super yatch.if any ONE can help then plz......................
Any kind of help or suggetion will be highly apritiated.............
:( :(

[apex1]

Thats a bit few information.

Would you mind to give us some more data, i.e. displacement, loa, etc.

Regards
Richard

[ruminame]

@apex1
Sorry bro for that less information.Actually i am a student of naval architecture of 3rd year & i dont understand power calculation,propultion system & rudder design that much & i was actually looking for the method how to determine those things.if u can help me in that case i will be greatful
to u.
i have attached my hydrostatic calculation & maxsurf drawing for ur better understanding.

[apex1]

Simple data would be better!

[ruminame]

displacement-2221.281 tonne
lwl-57.102m
draft-3.5m
Cb-.59
loa-60m
breadth-29.59m(including transverse gap)

[gonzo]

Now you need a target speed.

[ruminame]

15 knot
tell me the procedure!!!!!!!!!
where should i start from????????

[kistinie]

Select energy you intend to use.
Only oil or others ?
Do you have a budget for the others, like biogaze, solar panels, wind mill ?
Will you use air buoyancy to lift hull and reduce friction under hill ?
see Brian H. post about it

[apex1]

Select energy you intend to use.
Only oil or others ?
Do you have a budget for the others, like biogaze, solar panels, wind mill ?
Will you use air buoyancy to lift hull and reduce friction under hill ?
see Brian H. post about it

Are you going to give sound advice now, you "expert" ???:D

Biogas on a boat, yeah? cool...:cool:

[kistinie]

1500 passengers eating like 2, shitting like 4 (overunity miracle) plus kitchen carbon rubbishes are easily turned into methane. On the hard, or at sea, chemical reaction is the same, and automatic as soon as you close the **** tank. (http://www.i-sis.org.uk/BiogasChina.php)
A real gold mind...deep in the...as we miss it... just like 1000's of other possible solutions. (http://www.steorn.com/forum/comments.php?DiscussionID=28021)

[apex1]

Do you have 1500 pax on your floating litter bin?

Or any other Yacht?

What are you searching here?
Did the bad guys pee in your sandbox?
No other playground in your suburb?

[hoytedow]

Do you want to run under sail or power?

[kistinie]

Have you evaluated your needs in energy for light, heating, equipment

Can this equipment be class A grade like diode for light, PMBL motors instead of exited asynchronous...

[hoytedow]

Kistinie, Would you let this student work his way through the basic propulsion needs before you start piling all this crap up to his ears?

Diodes are nice, give a lot of light for the weight and energy needed but he is not to that point in this discussion yet.

[kistinie]

Diodes was to explain the spirit of my answer
Question was MOTOR
My answer was in motor, magnet or not ?
Between 2x more energy needed (http://www.steorn.com/forum/comments.php?DiscussionID=28021)

If you do not dream of improving the world you will have to live in, when your 20...
When will you do it ?


Do you think a 2010 student must learn how to install a Cat at tail, a generator at bottom, and lesson is over ?



What does mean "non pulcherrimum et non felicem locum" ?
My Latin is highly corroded

[hoytedow]

I worked 7 years as a draftsman and engineering assistant at an electric car company, so I've paid my Greens dues. I am saying learn basic principles before opting for exotic configurations.
Some of us actually value internal combustion for a set of reasons, not the least of which is power achieved relative to weight on board.

[kistinie]

I had answered your question yesterday in a hard technical way.
This morning message is gone

Administrator, please look sharp, there may be a black hole in the site.
Hope it is the last time
To encourage you to, i will repeat it again.
-------------------------------------------------------

I worked 7 years as a draftsman and engineering assistant at an electric car company, so I've paid my Greens dues.
Great to know it is over for you

I am saying learn basic principles before opting for exotic configurations.
I say it with you, learn basic physic as Quantum physics use classical mechanics, just like classical mechanics uses quantum effects.
LEARN BOTH as BOTH are the physic that rule our world.

Some of us actually value internal combustion for a set of reasons, not the least of which is power achieved relative to weight on board.

Honestly when i think to the tons of fuel i have burnt i my car and the poor efficiency of ICE compare to

Nuclear power
Stirling motor
Steam Quasi turbine
Magnet motor

i hardly can beleive what you say about weight.
I decided to go to electric on WINGOVER for weight reasons too.
For a boat needing an equivalent of a 9 Hp diesel, Electric was lighter than the ICE equivalent.

Can you show us a few numbers that prove what you say here ?

[ruminame]

We are going to use normal propulsion engine would be run by oil.I am only a student of naval architecture , a amateur in this field of yacht building who is trying to learn as much as he can.So plz Guyz tell me about the basic procedure of designing propulsion & rudder system.The procedure would help me more such to design a propulsion & rudder system what are the things i should consider?????where to start from???etc

[apex1]

I had answered your question yesterday in a hard technical way.
No you did not! Just claims and drivel!


i hardly can beleive what you say about weight.
I decided to go to electric on WINGOVER for weight reasons too.
For a boat needing an equivalent of a 9 Hp diesel, Electric was lighter than the ICE equivalent.

Can you show us a few numbers that prove what you say here ?[/COLOR]

No mate, YOU have to show US some numbers why you think Electric propulsion weight is lower than ICE ! And you cannot, because it is impossible at present!

STOP to drivel down every other thread with your premature nonsense!

Your reputation status clearly shows your expertise! Though it is still too good, -200 is what you deserve.

[hoytedow]

Ruminame, do you have access to any books on ship or yacht design? The fundamentals will be found in such books. Check out Skene's Elements of Yacht Design, first. But don't stop there.

[conceptia]

firstly you need to find the resistance of the vessel at 15 knots. Now using this find the effective power required. now calculate the brake power using that. Use this data to design the propeller parameters(use wageninger b-series propeller chart). For rudder design use NACA 0016 profile. Get help from the faculty man...