[Public-List] Alberg Power Consumption

[Robert Kirk]

Dan... That'd be fascinating; please tell us more.  I'd like to know how it 
turned out. My guess is, good for in-and-out, but less good for long cruising.

I would also guess that your electric propulsion could answer a question 
that always intrigued me: Just how much horsepower does it take to run an 
A30? There's been a lot of discussion on how much power an Atomic 4 really 
puts out, and whether you need a 12HP or 15HP diesel, etc. Now we can find 
out;  with an electric motor, you can measure it directly. For instance, 
how many amps do you draw (and at what voltage drop) cruising at 5 Kts? 
That's the true horsepower it takes to push the boat along. [My guess: 
6KW].  I'd guess you have an ammeter (& voltmeter) to measure the draw in 
real time, and do not need to rely on manufacturer's specs.

Also, what does she draw at full power and at, say, 2 Kts slow 
cruise?  If  I remember the sea stories about WW2 submarines, they could go 
2 days underwater at 2 Kts, but only a half-hour at full speed. Are you 
similar?

How much battery do you carry?

Bob Kirk
Isobar 181

At 02:03 PM 5/22/2008, dan walker wrote:
>bob, if that was me you were referring to, i did go elelctric, and thus 
>far i have been very pleased. i did do a short follow up, but no dog and 
>pony show yet because i want to do more "sea  trials"
>dan
>rascal 145


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