---------------------------------------------------------- TeamGrumman-List Digest Archive --- Total Messages Posted Thu 12/14/06: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:23 PM - Battery and Starter Relays. (teamgrumman@aol.com) 2. 10:26 PM - Boooom Beam (Rick) ________________________________ Message 1 _____________________________________ Time: 07:23:21 PM PST US Subject: TeamGrumman-List: Battery and Starter Relays. From: teamgrumman@aol.com I'm doing a firewall forward restoration on a Cheetah. The relays look pretty bad. One of them has some sort of plastic stuff leaking out. Knowing that it's such a pain in the ass to change the relays, I wanted to get new ones. Easier said than done. I started with the Aircraft Spruce catalog. Then, the Wag-Aero catalog. Then, the Chief Aircraft catalog. Not being content with accepting what they have, I started researching just what the different part numbers mean. The company that made the relays on our Grummans was bought out by the White-Rodgers Division of Emerson Electric Co. in St Louis, MO. Getting from their web site to the specifications of, and the definitions for the relays wasn't so easy. What I found out was, the relays we use are Type 70 solenoids. The battery relay is a continuous duty relay. The starter is an intermettent duty relay. The part numbers break down like this: 70 - x xx xxx - x 70: type of relay x: this tells what kind of relay, normally open (1) or SPDT (3). xx: This tells the voltage for the relay. There is a post in the gg archive for a starter solenoid that gives a part number starting with 70- 109 xxx - x. It's wrong. 109 is a 6 volt relay. - For continuous 12 volt, the number is 11 - For intermettent 12 volt, the number is 12 xxx: This gives the coil termination description. The two we need to know about is 225 and 226 225: is for a coil grounded to the relay case. - To activate this one, voltage is applied to the small terminal. 226: is for the coil connected to the battery side of the solenoid. - To activate this one, ground is applied to the small terminal. x: the last x tells what kind of a mounting hardware it has. 5 is typical. SO . . . . Battery relay: 70-111 226-5 Aircraft Spruce has this one. The Battery relay that Wag-Aero has is 70-111 225-5. That means it needs voltage applied to work. The Master switch on the AA5x goes to ground so it won't work. Starter relay: 70-112 225-5 Wag-Aero has this one. Without that bit of info, the wrong relay could be ordered easily. ________________________________________________________________________ across the web, free AOL Mail and more. ________________________________ Message 2 _____________________________________ Time: 10:26:35 PM PST US From: "Rick " Subject: TeamGrumman-List: Boooom Beam Gary, I just received my new Boom Beam kit. Have you installed one yet? Want to? Rick Pollack Tiger 4542N SMO ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message teamgrumman-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/TeamGrumman-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/teamgrumman-list Browse Digests http://www.matronics.com/digest/teamgrumman-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.