Dennis,
I discovered today that my secondary
injector disable switch was bad. Flipping the switch gave no continuity
either way. After flipping it back and forth several times, it began to
make a high resistance contact. I guess the movement caused the contacts
to clean off a little.
I am using the Carling S700 series switch
espoused by Bob Nuckolls and sold by B & C. This was a 2-3 switch
that is double pole and is on-on. These switches are pretty inexpensive…$7.50
each. I was getting ready to order a couple more switches and got
to thinking about it.
The injectors pull pretty high amps I think
pretty close to the switch capacity. Does anyone know how many amps the
injectors pull?
Is there a switch with pretty high
capacity that is on-on with push tabs that I could substitute?
Bobby suggested some Honeywell switches
but they are not on-on and don’t accept the push tabs.
Bill
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net]
Sent: Friday, January 15, 2016
10:44 PM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: What do
you think may be happening?
What type of switch are you using to disable the primary and
secondary injectors? I was using "rocker" switches and I
found they failed to make good contact - failed "open".
This would turn off the one set of injectors but not tell the computer to double
the on time of the other injectors. I replaced all my switches
rocker switches with "snapping" toggle switches.
I want to thank Steven Boese, Bobby Hughes and Mark Steitle
for all their help in diagnosing this problem.
I never could make the switch fail during ground run
testing!
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