Today's Message Index:
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1. 04:38 AM - Re: Small wires running with big wires (user9253)
2. 06:29 AM - Re: Dimmers without switches (Robert L. Nuckolls, III)
3. 06:44 AM - Re: Re: Small wires running with big wires (Robert L. Nuckolls, III)
4. 11:02 AM - Europa XS #191 Project For Sale (Vaughn Teegarden)
5. 01:53 PM - Re: heat probe (bobnoffs)
Message 1
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| Subject: | Re: Small wires running with big wires |
All of the wires that you mentioned can be run together without worry of interference.
The wires that are most vulnerable are audio wires, especially those whose signals
get amplified.
Do not let the metallic parts of audio jacks touch metal airframe parts.
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=499473#499473
Message 2
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| Subject: | Re: Dimmers without switches |
At 08:01 PM 11/21/2020, you wrote:
>England <ceengland7@gmail.com>
>
>On 11/21/2020 6:59 PM, Dan wrote:
>>For reasons of size/spacing I ordered 4
>>potentiometers (5k ohms) with longer shafts to
>>replace the ones with my VAL CLA 500 dimmer
>>unit.=C2 But the units I ordered do not have a
>>SPST switch that turns them off when rotated
>>all the way counter clockwise.=C2 (The other
>>ones have the switch, but I need the longer
>>shaft).=C2 If I use them, would I need a
>>separate switch for the dimmer unit, or could I
>>leave the four potentiometers "on" but rotated
>>fully clockwise while keeping the light
>>off.=C2 Would that mean they would be drawing a continuous load all the
time?
>How about
>https://www.google.com/search?q=volume+control+shaft+extension&rlz=1C1C
HBF_enUS843US843&oq=volume+control+shaft+extension&aqs=chrome..69i57.118
93j0j7&sourceid=chrome&ie=UTF-8
>instead?
>
>Charlie
There is a case to be made for not turning
panels lights completely OFF . . . just dimming
them to an intensity that is at the minimum
that would be used in flight.
See chapter on lighting in the 'Connection.
You'll read an explanation of how keeping
incandescent bulbs 'warm' increases their
durability under vibration. Of course this
doesn't apply for LED.
Our line of dimmer assemblies from years
past set the max CCW voltage at about 4
volts. No significant light output. But
the lights would 'come alive' at the first
rotation of the pot.
Be aware too that many pots with switches
are 'volume controls' and do not have linear
rotation vs. voltage curves.
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
Message 3
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| Subject: | Re: Small wires running with big wires |
At 06:34 AM 11/23/2020, you wrote:
>
>All of the wires that you mentioned can be run together without
>worry of interference.
>The wires that are most vulnerable are audio wires, especially those
>whose signals get amplified.
and even then . . . the system designers will call out
shielded wire where appropriate along with how those
shields are to be terminated.
There is no good reason to separate bundles of
wires for the various systems as a hedge against
noise.
Back before they learned better, ADF installations
in a single engine Cessna came with a kit for adding
shields to alternator wiring . . . later the shields
became 'standard'. I could never find anyone in the
SE Electrical Group that could point to any empirical
testing or analysis of the physics that justified
this non-trivial expense. This wiring diagram
is an excerpt from a C172 service manual.
Short answer is: route wires as appropriate to
construction goals.
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
Message 4
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| Subject: | Europa XS #191 Project For Sale |
I am unable to complete my project. See attachment for details.
Sent from Mail for Windows 10
Message 5
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well, here's where i am at. the gearbox feeds the oil sump with a 1/2'id hose.
the run is about 18' long. my plan is to install a tee with hose barbs as close
as possible to the gearbox. maybe insulate the barb and hose to the gearbox.
some kind of pattern will develop. gearbox at cruise when 60 deg oat runs 20
cooler than coolant, runs the same as coolant etc. i should be able to get a
meaningful warning by watching those numbers. maybe not as good as a closed gearbox
but way better than 'do you smell something hot?'
i am also thinking of another tee downstream , close to the sump. a magnetic
plug will have to do. again, way better than nothing.
final fittings and hookup will remain to be seen until i begin actually taking
the oil line apart.
thanks to all for the suggestions, it really helped.
bob noffs
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=499486#499486
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