REFLECTOR: Using the starter supply(+) wire as a charge wire
Joe Ewen
jewen at comporium.net
Sun Jan 28 19:58:51 CST 2007
Terry,
An ANL is a one time fuse, an overload will leave you with out an alternator. You may want to consider a Type 1 auto reset circuit breaker. It will break under overload and will reset when the overload clears. http://www.delcity.net/delcity/servlet/catalog?parentid3071&page=1
On your earlier discussions about amp meters, you may want to consider an Hall Effect Current Sensor rather than a shunt. The sensor is a donut shape component that fits around a wire with no exposed connections. It provides a signal proportional to current flow and direction. http://www.ampsense.com/
Joe
----- Original Message -----
From: Terry Miles
To: 'Jim Agnew' ; 'Velocity Aircraft Owners and Builders list'
Sent: Saturday, January 27, 2007 10:33 PM
Subject: Re: REFLECTOR: Using the starter supply(+) wire as a charge wire
Thanks,Jim. Sorry. In a earlier post about this I mentioned, there will be an 60a ANL current limiter between the B lead and the wire run back to starter lug.
Terry
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From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Jim Agnew
Sent: Saturday, January 27, 2007 3:44 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Using the starter supply(+) wire as a charge wire
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
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