Today's Message Index:
----------------------
1. 07:23 PM - Battery and Starter Relays. (teamgrumman@aol.com)
2. 10:26 PM - Boooom Beam (Rick)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Battery and Starter Relays. |
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
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
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
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|