REFLECTOR: Using the starter supply(+) wire as a charge wire

[Jim Agnew]

You can do this however remember that the starter cable is like a welding cable and without any circuit breaker protection so a short will cause a fire!  That is the reason for the starter relay to minimize the length of the unprotected wire.  You normally have a CB in the alternator power lead.
 
Jim

 
James F. Agnew
Jim_Agnew_2 at Yahoo.Com
Tampa, FL
Velocity 173 Elite Aircraft Completed & Flying 



----- Original Message ----
From: Al Gietzen <ALVentures at cox.net>
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Sent: Saturday, January 27, 2007 12:34:00 PM
Subject: Re: REFLECTOR: Using the starter supply(+) wire as a charge wire


I talked w/ Skytec starters today.  On their web site they talk about an alternative wiring scheme that eliminates the normal firewall starter contactor which is required on certified span cans.  I can wire my starter button directly to the coil/contactor that is bolted to the Skytec starter instead doing the conventional route of contactor in the nose that then ports juice to the Skytec contactor and its starter motor.
 
Terry;
 
I don’t know about the Skytec, but typically the solenoid/contactor on the starter takes a significant current, and has a very large in-rush current.  I think you’d would want a switch rated to 30-40 A; with spike suppression, for reliability.  I used a automotive 40 A relay for the job (also with a TVS) so I could use a light duty push button up front.
 
Al
_______________________________________________
To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector

Visit the gallery!  www.tvbf.org/gallery
user:pw Check new archives: www.tvbf.org/pipermail
Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.tvbf.org/mailman/private/reflector/attachments/20070127/e5fb58e3/attachment.htm