[Public-list] electric repower

[Mike Lehman]

Mike,

I think your range is more like 100nm



Mike Lehman
~~~_/)_/)~~_/)~~~




----Original Message Follows----
From: "Meinhold, Michael J" <MICHAEL.J.MEINHOLD at saic.com>
Reply-To: Alberg 30 Public List -- open to all <public-list at alberg30.org>
To: Alberg 30 Public List -- open to all <public-list at alberg30.org>
Subject: RE: [Public-list] electric repower
Date: Tue, 7 Jun 2005 08:15:11 -0400

Most of the websites offering electric propulsion neglect to discuss a power
source or power storage.
Getting a reasonable motoring range out of batteries is the kicker with
electric propulsion .

The energy density of gas is about  6. kilowatt-hours / pound, and it weighs
about 6.2 pounds/gal,
so my 10 gallon gas tank stores 6*6.2*10 = 372 kilowatt-hours. I think I
have a range of about 35 NM (more experienced A30/A4 owners can correct me)

The energy density of a Lead-acid battery is about 0.03 kilowatt-hours /
pound. So to match the range provided by the gas tank, I'd need 372 / 0.03 =
12,400 lbs of batteries.

An electric drive has the potential of being a lot more efficient, but it's
not going to solve this problem.



-----Original Message-----
From: public-list-bounces at alberg30.org
[mailto:public-list-bounces at alberg30.org]On Behalf Of J. Brown
Sent: Tuesday, June 07, 2005 12:52 AM
To: Alberg 30 Public List -- open to all
Subject: Re: [Public-list] electric repower



I'd go for it if I had the money but it is much more expensive and a lot
more expensive if you want the same power (max hull speed).

I like the set up these guys offer: http://www.solomontechnologies.com/

On the other hand if all you use the inboard for is to get you in and out
of a small easy harbor on nice days then it should be considered because
you wouldn't need to spend lots of money for that kind of duty.

Here are some incomplete thoughts I had on the subject:
http://www.jb0713.com/sail/engine/electric.htm

Haefen

At 03:45 PM 6/6/2005 -0700, you wrote:
 >as many know, i have been slowly moving towards repowering from gas to
 >diesel. then i started thinking about going to electric. stumbled on ngc's
 >website, and now see their name as a sponsor for the alberg 30 site.
 >looked to see if anyone has done this in the group but found no refernces.
 >so, has anyone had any experience in this area? diesel smell has always
 >nauseated me so this method has a lot of appeal
 >constructive comments are welcome
 >dan
 >
 >
 >---------------------------------
 >Discover Yahoo!
 >  Find restaurants, movies, travel & more fun for the weekend. Check it
out!
 >_______________________________________________
 >Public-list mailing list
 >Public-list at alberg30.org
 >http://alberg30.org/mailman/listinfo/public-list

_______________________________________________
Public-list mailing list
Public-list at alberg30.org
http://alberg30.org/mailman/listinfo/public-list
_______________________________________________
Public-list mailing list
Public-list at alberg30.org
http://alberg30.org/mailman/listinfo/public-list

_________________________________________________________________
Express yourself instantly with MSN Messenger! Download today - it's FREE! 
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/


 1118146831.0