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1. 01:46 PM - Re: Carb Heat Indication Mod ()
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Subject: | Carb Heat Indication Mod |
Nice job Galin
Keep well
Mike
From: owner-kis-list-server@matronics.com <owner-kis-list-server@matronics.
com> On Behalf Of Galin Hernandez
Sent: March 22, 2020 7:40 PM
Subject: KIS-List: Carb Heat Indication Mod
During certain times while flying Carburetor Heat is used to help prevent i
cing and a possible engine failure. But sometimes during high workload situ
ations I forget to turn it off which prevents the engine from generating fu
ll power and I don't want to be looking down to check the status. So I deci
ded to design something to indicate when the carb heat is on. Now in keepin
g with the KIS principle it had to be simple, reliable, cheap to build and
easy to install. This is what I came up with.
I used a military grade roller lever switch to send a signal to my DYNON sy
stem when the carb heat knob was moved. This would then indicate right on m
y EFIS if carb heat was on or off. It would be simple to fabricate, instal
l and configure.
First I made a mounting bracket out of a bent a piece of spare stainless st
eel. I tapped the bracket so I could use #6 screws to hold the roller lever
switch to the bracket. To limit vibrations felt by the switch I bonded a p
iece of spare rubber to the bracket with high heat silicone sealant. The ca
rb heat box already had a convenient mounting location where I could use a
#8 screw to mount the new assembly near the carb heat cable. By adjusting t
he assembly a little, the carb heat cable actuator would move the roller le
ver on the switch. I connected one side of the switch to ground and the oth
er to an available contact pin on the DYNON EMS DB-37 module.
After some quick configuration, I now have a light blue indication on my EF
IS when the carb heat is on. Simple, effective and a I actually enjoyed the
project.
You can see photos of what I did on our web page ( www.puertoricoflyer.com
<http://www.puertoricoflyer.com> ).
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