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Showing results 1 to 12 of 12
Search took 0.00 seconds. Search: Posts Made By: bouncycastle
Forum: Multihull Sailboats 16-12-2019, 14:35
Replies: 87
Views: 19,888
Posted By bouncycastle
Re: Gemini 105mc conversion Diesel to EV?

Any spec sheets on them last I recall they are 3.7 volt LiPo 20 amp and any EU sales outlets that sell single packs ???
Forum: Multihull Sailboats 11-12-2019, 11:31
Replies: 87
Views: 19,888
Posted By bouncycastle
Re: Gemini 105mc conversion Diesel to EV?

Sorry to disappoint you I would not have the brain power to invent the term or idea "global efficiency"

I merely copy the guru of this idea Global efficiency such as in the 1980 era Burt Rutan of...
Forum: Multihull Sailboats 09-12-2019, 10:28
Replies: 87
Views: 19,888
Posted By bouncycastle
Re: Gemini 105mc conversion Diesel to EV?

Boats 4




The point of the thread is to expose the problems or advantages of converting a large cat with inboard to electric power

To show this it requires a fuller understanding of where...
Forum: Multihull Sailboats 08-12-2019, 18:01
Replies: 87
Views: 19,888
Posted By bouncycastle
Re: Gemini 105mc conversion Diesel to EV?

You seem to have lost the real meaning of the statement so i will outline the logic again below this sentence






A 9 HP engine rating means the maximum power of that engine at some...
Forum: Multihull Sailboats 08-12-2019, 16:11
Replies: 87
Views: 19,888
Posted By bouncycastle
Re: Gemini 105mc conversion Diesel to EV?

Yes you can mix power and energy like that more info below
Yes you can take total life time efficiency and apply it to single part of the life cycle more info below

Confusion reins supreme in...
Forum: Multihull Sailboats 07-12-2019, 08:49
Replies: 87
Views: 19,888
Posted By bouncycastle
Re: Gemini 105mc conversion Diesel to EV?

Thank you this reply of your supplies Lots of useful data to show the real story


I shall start with two ICE powered mono hulls of similar length about 28 feet

The first one is 3 ton 27...
Forum: Multihull Sailboats 07-12-2019, 07:52
Replies: 87
Views: 19,888
Posted By bouncycastle
Re: Gemini 105mc conversion Diesel to EV?

Unfortunately this planet consists of the laws of Physics and the sales reps selling you an idea

A boat with either sails or ICE or Electric will have parts and components and modules that have...
Forum: Multihull Sailboats 07-12-2019, 04:56
Replies: 87
Views: 19,888
Posted By bouncycastle
Re: Gemini 105mc conversion Diesel to EV?

Any price on those two by 12 kilowatt 48 packs ??

Anyway 36 USA gallons converted to kilos to KWatts energy and estimate 5% of that power makes some 55 KWatts useful power to the boat
2x12 KW...
Forum: Multihull Sailboats 06-12-2019, 15:53
Replies: 87
Views: 19,888
Posted By bouncycastle
Re: Gemini 105mc conversion Diesel to EV?

Cats do not do conservation of momentum
Cats without deep dagger boards don't do sailing in straight line with wind side on to them they are moving sidewards sometimes as fast as they go forwards...
Forum: Multihull Sailboats 06-12-2019, 12:25
Replies: 87
Views: 19,888
Posted By bouncycastle
Re: Gemini 105mc conversion Diesel to EV?

Honestly my experience sailing my cousins 1980 era Prout cat 37 foot ,8 ton craft with 35 HP Myanmar central leg with large prop is in 30 knot head wind forward speed at full tilt was less than two...
Forum: Multihull Sailboats 06-12-2019, 11:00
Replies: 87
Views: 19,888
Posted By bouncycastle
Re: Gemini 105mc conversion Diesel to EV?

Some losses exist there but props are typically 60% efficient at best .

However best % power and fuel returns tends to be two bladed slow RPM props without keel or rudder or close to hull that...
Forum: Multihull Sailboats 06-12-2019, 09:54
Replies: 87
Views: 19,888
Posted By bouncycastle
Re: Gemini 105mc conversion Diesel to EV?

Electric power efficiency versus fuel is more to do with large losses of I/C engines .
Roughly speaking the global efficiency of I/C is about ~5%.

The screams from the roof tops are that Diesel...
Showing results 1 to 12 of 12

 
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