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42 Volt Systems and Lore

To: land-speed@autox.team.net
Subject: 42 Volt Systems and Lore
From: Ken Bond <kmb2@humboldt.edu>
Date: Tue, 16 Jan 2001 09:37:10 -0800
This is probably "old hat" for many, but I just ran
across a discussion that in 2002 there will be two vehicles with 
42 volts systems from BMW and Mercedes, see: www.sae.org.  Looks like
a whole bunch of cars will be at 42 volts by the end of the
decade.  Opens the door for significant electrical-magnetic
applications; more stability; less weight in wiring, etc.

*******

Given all the comments about ships recently, and given that
it is winter... thought the following bit of navy lore might
be interesting to some

 Naval  Lore with a twist 

Every sailing ship had to have cannon for protection.  Cannon of the times 
required round iron cannonballs. The master wanted to  store the 
cannonballs such that they could be of instant use when needed,  yet not roll 
around the gun deck. The solution was to stack them up in a  square-based 
pyramid next to the cannon. 

The top level of the stack  had one ball, the next level down had four, the 
next had nine, the next had  sixteen,and so on. Four levels would provide a 
stack of 30 cannonballs.  

The only real problem was how to keep the bottom level from sliding out from 
under the weight of the higher levels. 

To do this, they devised  a small brass plate ("brass monkey") with one 
rounded indentation for each  cannonball in the bottom layer. Brass was used 
because the cannonballs  wouldn't rust to the "brass monkey," but would rust 
to an iron one.  

When temperature falls, brass contracts in size faster than iron. As it  got 
cold on the gun decks, the indentations in the brass monkey would get smaller 
than the iron cannonballs they were holding. If the temperature got  cold 
enough, the bottom layer would pop out of the indentations spilling the  
entire pyramid over the deck. 

Thus it was, quite literally, "cold  enough to freeze the balls off a brass 
monkey."  


KEN


* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Ken Bond,                                                 *
* Prof. of Bus. Admin.                                      *
* Humboldt State Univ.              ____________            *
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*                         /      Can I have and still   /   *
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