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Showing results 1 to 9 of 9
Search took 0.00 seconds. Search: Posts Made By: ctsbillc
Forum: Propellers & Drive Systems 02-11-2009, 17:02
Replies: 255
Views: 41,044
Posted By ctsbillc
The old method of measuring output from engines...

The old method of measuring output from engines was the water brake, which is a lot like a propeller in water.

There are a lot of electric drive vessels around, including the huge cruise ships,...
Forum: Propellers & Drive Systems 24-10-2009, 08:52
Replies: 255
Views: 41,044
Posted By ctsbillc
Currently (or should it be voltagely?) it would...

Currently (or should it be voltagely?) it would seem hybrid is great for getting out of harbour. The difference from cars is, as stated, no regen from braking and no idling at stop lights, but...
Forum: Propellers & Drive Systems 20-10-2009, 06:13
Replies: 255
Views: 41,044
Posted By ctsbillc
Slow charge is what we get from the prop or solar...

Slow charge is what we get from the prop or solar on a boat of course.

Hybrid drive makes a lot more sense for a boat than on a car.
Forum: Propellers & Drive Systems 15-10-2009, 17:09
Replies: 255
Views: 41,044
Posted By ctsbillc
Ammonia

Ops, sorry. An ammonia leak in a cabin would be pretty rough. This may be why Ammonia is never presented as a viable clean energy source. It may be clean after it has burned, but prior to that it...
Forum: Propellers & Drive Systems 15-10-2009, 16:25
Replies: 255
Views: 41,044
Posted By ctsbillc
Alternate power

Ammonia is lighter than air, but certainly you do want a leak in your cabin.

Talking about leaks, another recent discovery is that electrolysis of urine liberates hydrogen for a lot less energy...
Forum: Propellers & Drive Systems 10-10-2009, 12:47
Replies: 255
Views: 41,044
Posted By ctsbillc
Excellent. I've just been browsing your products...

Excellent. I've just been browsing your products on the web. Are there any technical white papers published on the technology?
Forum: Propellers & Drive Systems 10-10-2009, 10:35
Replies: 255
Views: 41,044
Posted By ctsbillc
Do you use regenerative from the prop while...

Do you use regenerative from the prop while sailing? I imagine the effect on a boat speed even with regenerative is less than the drag of a fixed prop.
Forum: Propellers & Drive Systems 10-10-2009, 09:51
Replies: 255
Views: 41,044
Posted By ctsbillc
Many electrically powered boat use no batteries,...

Many electrically powered boat use no batteries, same as diesel electric trains.

Batteries are a energy store, no more, and certainly the energy density is not close to diesel.
Forum: Propellers & Drive Systems 10-10-2009, 08:01
Replies: 255
Views: 41,044
Posted By ctsbillc
future boat

I had the pleasure of a tour of a rather nice electrically driven boat a while back, A submarine.

The whole of the bottom was batteries, 600V of lead-acids. Drive motor was huge.

Electric...
Showing results 1 to 9 of 9

 
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