Today's Message Index:
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1. 07:42 PM - Carb Heat Indication Mod (Galin Hernandez)
2. 08:04 PM - Re: Carb Heat Indication Mod (Robert Reed)
Message 1
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Subject: | Carb Heat Indication Mod |
During certain times while flying Carburetor Heat is used to help prevent
icing and a possible engine failure. But sometimes during high workload
situations I forget to turn it off which prevents the engine from
generating full power and I don't want to be looking down to check the
status. So I decided to design something to indicate when the carb heat is
on. Now in keeping 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
system when the carb heat knob was moved. This would then indicate right on
my EFIS if carb heat was on or off. It would be simple to fabricate,
install and configure.
First I made a mounting bracket out of a bent a piece of spare stainless
steel. 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 piece of spare rubber to the bracket with high heat silicone
sealant. The carb 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 the assembly a little, the carb heat cable actuator would move
the roller lever on the switch. I connected one side of the switch to
ground and the other 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
EFIS 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
).
Message 2
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Subject: | Re: Carb Heat Indication Mod |
Good job, that=99s why I went with fuel injection directly to intake p
orts.
Bob Reed
Sent from my iPhone
> On Mar 22, 2020, at 9:42 PM, Galin Hernandez <galinhdz@gmail.com> wrote:
>
> =EF=BB
> During certain times while flying Carburetor Heat is used to help prevent i
cing and a possible engine failure. But sometimes during high workload situa
tions I forget to turn it off which prevents the engine from generating full
power and I don't want to be looking down to check the status. So I decided
to design something to indicate when the carb heat is on. Now in keeping wi
th the KIS principle it had to be simple, reliable, cheap to build and easy t
o install. This is what I came up with.
>
> I used a military grade roller lever switch to send a signal to my DYNON s
ystem 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, install
and configure.
>
> First I made a mounting bracket out of a bent a piece of spare stainless s
teel. 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 pi
ece of spare rubber to the bracket with high heat silicone sealant. The carb
heat box already had a convenient mounting location where I could use a #8 s
crew to mount the new assembly near the carb heat cable. By adjusting the as
sembly a little, the carb heat cable actuator would move the roller lever on
the switch. I connected one side of the switch to ground and the other to a
n available contact pin on the DYNON EMS DB-37 module.
>
> After some quick configuration, I now have a light blue indication on my E
FIS 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
).
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