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battery cables & Relays 'G's" skunk stink

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FLYaDIVE(at)aol.com
Guest

Posted: Sun Oct 01, 2006 6:30 am Post subject: battery cables & Relays 'G's" skunk stink

In a message dated 9/30/06 7:21:09 PM Eastern Daylight Time, 

N6030X(at)DaveMorris.com writes:



 	  Quote: 	
		   So they why does everybody install them upside-down?  Has the myth taken 

hold?
	


 	  Quote: 	
		   

  

  Dave Morris

===================
	


So right you are ... Welcome to "The Myth Market".



Have you ever heard the story/explaination on why Perfume coast more than 

cologne?



As you probably do already know Perfume lasts for a much longer time than 

cologne.  [BTW, even though the term cologne has been adapted for men, the same 

exists for women, just that it still goes by the name perfume and still does 

not last as long as good perfume.]

Well, in the making of perfume Skunk Essence is used and as you all know the 

smell of skunk lingers for a long, long time.  This skunk essence is expensive 

to collect - MILK - is the term.  Just as you MILK a snake for its venom you 

milk a skunk for its essence.  Small amounts of the essence or extract are 

used in the manufacture of perfume.  Hence the basis for the additional cost.  

Now, don't get me wrong, ADVERTISING has raised the price to coincide with the 

purchasing ego.  But the first initial price difference was due to the expense 

of skunk essence.



So have you, your wives or girlfriends ever heard of this explanation?

I'll tell you the REST of the story after this beak.



Barry

"Chop'd Liver"



"Show them the first time, correct them the second time, kick them the third 

time." 

Yamashiada

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Eric M. Jones

Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts

Posted: Mon Oct 02, 2006 7:07 am Post subject: Re: battery cables & Relays 'G's

I think it is time for someone with a little authority to clear this up. My authority is so little that I have hidden it under one of the periods in this posting. A prize awaits the one who finds it.



1) Relay mounting. Type 70 Stancor Rodgers White Emerson Tyco. See: 



http://www.alliedelec.com/Images/Products/Datasheets/BM/STANCOR/Stancor_Industrial-Control_5760005.pdf



So the manufacturer says, "mount plunger vertical, cap down". I checked into the engineering data on this part and of course the corporate conglomeratization has destroyed the engineering knowledge that built the part. The manufacturer PROMISED they'd get back to me.....It's not DO-160 bubela. And it's only 122 deg F max operating temp. Etc. etc. Use the Kilovac EV200 part if you can. 



(Yes, I am selling my Powerlink Jr. III now and I am MONTHS late.)



2) G-forces: [CAUTION-Head May Explode]  Jacob Rabinow's Law (not that he called it that...). Gracefulness is "when the first, second, and third derivatives of the equation of motion monotonically and simultaneously go to zero." Which is to say--when the velocity, acceleration and impulse (the change in acceleration) smoothly and simultaneously go to zero.



So many mysteries--a gyro will be ruined if placed on a workbench hard enough to be audible, but will do fine in an airplane doing aerobatics or combat. A pencil held horizontal and dropped 12 inches experiences G-forces that will destroy an airplane and kill a pilot. Curtis mercury-type elapsed-time meters were 12G-rated but failed if dropped on a workbench.



Motion is composed of displacement, velocity, acceleration and impulse elements. The stiffness of a system determines which of these can be ignored in any practical application. Designers and engineers have the job of measuring some of these elements and constraining the system to prevent the others from becoming critical. This has other physical science analogues too.



The exercise is left for the student.



"Everything you've learned in school as "obvious" becomes less and less obvious as you begin to study the universe. For example, there are no solids in the universe. There's not even a suggestion of a solid. There are no absolute continuums. There are no surfaces. There are no straight lines."

   - R. Buckminster Fuller

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_________________
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net

rparigor(at)SUFFOLK.LIB.N
Guest

Posted: Mon Oct 02, 2006 9:11 am Post subject: battery cables & Relays 'G's" skunk stink

Hello Eric



You wrote:



"So the manufacturer says, "mount plunger vertical, cap down"



I have never taken apart or looked very close at the relay that is being

talked about.



I can tell you that on old Savin 220 copiers had a lamp relay they called

a K-5.



It had a plunger that rode inside a brown phenolic guide. It was mounted

horizontal.



After some time, the phenolic would wear, and make a quite useful plunger

movement limiting pocket in the phenolic.



It was useful in demonstrating to customers just how a high resistance

connection could cause so much smoke and not trip the main circuit

breaker, that is until flames were a happening and the insulation complete

gave way and then tripped.



It was the contacts wearing out, and the pocket limiting motion. On

machines under contract I modified to a vertical plunger.



Could happen in some cases 10,000 copies. It was a 115V AC 15 amp relay,

the plunger was perhaps 3/16" or 1/4" in diameter. all that was needed was

a .005" pocket.



Ron Parigoris

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