[Public-list] ELECTRIC DRIVE

[Meinhold, Michael J]

A simple way to see if this is a practical system is to compare the rate at
which you generate power the rate at which you use it.

Here is the charging rate vs speed from the website :
At 4 knots = 1-2 amps
At 5 knots = 3-5 amps
At 6 knots = 7-12 amps
At 7 knots = 14 - 20 amps

Let's say we get 3 amps. 
3 amps * 12 volts = 36 volt-amps = 36 watts


I will guess the A30 needs about 15 of it's 30 hp to go 4 knots. I am
willing to believe the Oz motor and prop will be more efficient, so let's
say it only needs to deliver 10 hp to go 4 knots.
 10 hp * 746 watts/hp = 7460 watts

7460 watts powered / 36 watts sailing = 207 minutes of sailing for every
minute powered. If I take 10 minutes at each end to get in and out of the
dock, then I have to sail for 4140 minutes or 69 hours to charge back up.

It would appear that this system can't be independent - you need another
source of power to use it.

Mike
Rinn Duin #272




-----Original Message-----
From: public-list-bounces at alberg30.org
[mailto:public-list-bounces at alberg30.org]On Behalf Of Phil Prosser
Sent: Tuesday, September 14, 2004 9:52 AM
To: 'Alberg 30 Public List -- open to all'
Subject: RE: [Public-list] ELECTRIC DRIVE


What would be the range on that I wonder?  It could not be unlimited, since
perpetual motion is not possible... Right??? 

-----Original Message-----
From: public-list-bounces at alberg30.org
[mailto:public-list-bounces at alberg30.org] On Behalf Of Manza, John LtCol
Sent: Tuesday, September 14, 2004 8:13 AM
To: public-list at alberg30.org
Subject: [Public-list] ELECTRIC DRIVE

I plan to replace my old gas engine and I want to be open to all options.
One that I am considering is an electric drive.  The following link leads to
a demonstration that is pretty interesting by a manufacturer in Sweden that
runs like any electric engine, but recharges the batteries when the boat is
sailing.
http://www.ozecodrive.com/english/index_e.html
Has anyone in the group seen an electric drive in action?  John Manza "Jante
II" # 150 _______________________________________________
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