Matronics Email Lists :: View topic - OK . . Slow down and andswer a simple question

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

OK . . Slow down and andswer a simple question

Matronics Email Lists Forum Index -> AeroElectric-List

View previous topic :: View next topic

Author Message

jdalton77(at)comcast.net
Guest

Posted: Sun Jan 28, 2007 8:27 am Post subject: OK . . Slow down and andswer a simple question

Listers,

  

 With all of these these complex questions being discussed I often feel intimidated to ask simple ones.  You see, I'm a neophyte.  If it's woodworking, I could write the book.  If it's software, I'd go toe-to-toe with Bob's eletrical wizardry any time any place.  But I'm new to this.  So please bear with me as I continue to ask simple questions and don't flame me, tell me I should "look in the archives," read the book, or anything else that would sour my experience.  By the way, I've made similar comments on the RV-10 board, and on Vans Airforce, and you would be surprise how many emails I got from people like me thanking me for it.  'nuff said on that.

  

 Now my newbie question (and yes, I have the book and have read it).  The way I read about contactors, they need power to the "small" terminal to move the switch and allow the two large terminals to join which in turn allows the "real power" to pass through them.  But I was confused by the batter contactor (and the ground power contactor), which seems to only need a switch with a connection to the gound at the firewall to be activated.  I'm not sure I get how that works.  This is not the case for the starter contactor, which needs power to activate.  I know I could wire it up and make it work, I just want to know "why" so I am confident in my own work.

  

 Jeff

  [quote][b]

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

khorton01(at)rogers.com
Guest

Posted: Sun Jan 28, 2007 8:56 am Post subject: OK . . Slow down and andswer a simple question

On 28 Jan 2007, at 11:26, jdalton77(at)comcast.net wrote:



 	  Quote: 	
		   Listers,



 With all of these these complex questions being discussed I often  

 feel intimidated to ask simple ones.  You see, I'm a neophyte.  If  

 it's woodworking, I could write the book.  If it's software, I'd go  

 toe-to-toe with Bob's eletrical wizardry any time any place.  But  

 I'm new to this.  So please bear with me as I continue to ask  

 simple questions and don't flame me, tell me I should "look in the  

 archives," read the book, or anything else that would sour my  

 experience.  By the way, I've made similar comments on the RV-10  

 board, and on Vans Airforce, and you would be surprise how many  

 emails I got from people like me thanking me for it.  'nuff said on  

 that.



 Now my newbie question (and yes, I have the book and have read  

 it).  The way I read about contactors, they need power to the  

 "small" terminal to move the switch and allow the two large  

 terminals to join which in turn allows the "real power" to pass  

 through them.  But I was confused by the batter contactor (and the  

 ground power contactor), which seems to only need a switch with a  

 connection to the gound at the firewall to be activated.  I'm not  

 sure I get how that works.  This is not the case for the starter  

 contactor, which needs power to activate.  I know I could wire it  

 up and make it work, I just want to know "why" so I am confident in  

 my own work.




	




With the battery contactor, there is an internal connection that  

allows it to use the power from the battery to energize the coil on  

the solenoid that pulls the contactor closed.  No power flows through  

the coil in the solenoid until you provide a ground by closing the  

battery master switch.  As soon as you have provided a ground, now  

the current can flow from the battery, through the coil, which  

creates a magnetic field that pulls the solenoid closed.  This makes  

the connection that allows battery power to now flow to the rest of  

the aircraft.



Kevin Horton         RV-8 (finishing kit)

Ottawa, Canada

http://www.kilohotel.com/rv8

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

Display posts from previous:

	Matronics Email Lists Forum Index -> AeroElectric-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum