Today's Message Index:
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1. 04:32 PM - Wire Sizes in the wing (Stein Bruch)
2. 06:37 PM - Re: Wire Sizes in the wing (Wayne McMaster)
Message 1
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"Rv8-List" <rv8-list@matronics.com>, "Rv7-List" <rv7-list@matronics.com>,
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| Subject: | Wire Sizes in the wing |
SUSPICIOUS_RECIPS
--> RV6-List message posted by: "Stein Bruch" <stein@steinair.com>
Hi Guys,
Just a quick note about something that I've seen in the past month or two
that is a little confusing. I've had no less than at least 6 people ask me
for some AWG10 wire to use in their wings. Seems someone "out there" has
recommened AWG10 or AWG12 for running to the landing lights.
To anyone who is currently wiring your plane, don't fall into the trap that
some people do.....that being "if some is perfect, more must be better" -
with wire sizes, this is just a huge waste of money, weight, resources,
etc.. If the recommened wire is AWG16 or AWG18, there is NO reason to use
an AWG10.
Just a quick FYI, an AWG10 wire running the approximate length of a RVxx
wing, will carry something in the area of 800+ Watts. Who has a landing
light requiring that much power?!?! Heck, an AWG16 wire should carry well
over 180 Watts in that length.
Here's the simple breakdown before adding in resistance per 1K.
AWG10 - 70amps current carrying capacity
AWG12 - 50amps
AWG14 - 40amps
So, if you are one of those people running those huge AWG10 wires to your
wingtips, ask yourselves why?!? Two big reasons NOT to are:
1). Cost--AWG16-18 averages around $.17/ft & AWG10 is around $.50/ft (300%
higher).
2). Weight--AWG16-18 averages .005 lbs/ft, where AWG10 = .03lbs/ft.
Meaning, for an average set of wings at 2 wires x 18' = 36' x 2 wings = 72'
of wire. At AWG16 or 18 the weight would only be about 8oz's total. AWG10
would be over 2 POUNDS!!
Anyway, sorry about the rant...I just thought it might be a good idea to
bring this to the surface. Somehow, somewhere, there is a movement to put
fat wires into the wings, and I don't know why. If you are one of those
people, please enlighten me and the rest of us!
FYI, I do have AWG12 on up, and will stock some AWG10 in the future, but in
all reality, there isn't much need for it.
Cheers,
Stein Bruch
RV6's, Minneapolis
http://www.steinair.com
Message 2
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| Subject: | Re: Wire Sizes in the wing |
--> RV6-List message posted by: "Wayne McMaster" <wmcmaster@ipapilot.org>
Stein,
If you have time to reply, I have some wiring questions.
I appreciate your comments, My tail is done - except I am waiting to the
fiberglass until later. I have just about completed my RV 7 wings. My
Fuselage is scheduled to arrive the first part of April. I have the time to
work on finishing the wings, so I plan to do as much as I can. I may be
moving this summer, so My completed parts will likely have a home in a
friends hanger. I want to have the bottom skins on my wings and my wingtips
installed if that is the case.
Anyway, My note to you comes from the fact that I am currently trying to
figure out the best way / type / size of wire to run to my wingtips. I
don't want to overdo it, but do want to be sure I pick wire that will work
properly.
I have Bill Dubes LED nav lights. Any ideas what size wires to run for
them. I have ordered the standard tail pos / strobe to run on the same
circuit.
I am planning on 75 watt wingtip mounted halogen landing lights -- however,
I want to wire it as if I have 100w bulbs - so that if I decide that 75w/
tip is not good enough for me it will be a matter of ordering the 100w
bulbs, and swapping the lights out. My dad lives on an unlighted strip, so
I may have some dark takeoffs.
I am planning on installing:
Whelen CP660 strobe power supply - with white wingtip strobes / tail combo
pos/strobe light, and possibly a red strobe (if I can find a low drag place
to put it on the Fuselage.)
VOR ant in both wingtips. What is the recommended wire for them?
Comm ant in both wingtips (one for com, and one for FM radio) The wing tip
comm will be comm 2.
True trak autopilot servo ( standard pos at the aileron belcrank of the
right wing) What is the best type of wire for it?
Heated Piper type pitot tube (just outboard of the left aileron belcrank)
I do plan to do my homework and find some good wiring / electrical system
references, but would love to hear your opinions on the subject.
If you don't have time to respond, I understand.
Thanks in advance.
Wayne McMaster
SDF (Louisville, KY)
RV 7 standard build
wmcmaster@ipapilot.org
502-261-9961 h
502-387-1066 c
----- Original Message -----
From: "Stein Bruch" <stein@steinair.com>
"Rv8-List" <rv8-list@matronics.com>; "Rv7-List" <rv7-list@matronics.com>;
"Rv6-List" <rv6-list@matronics.com>
Subject: RV6-List: Wire Sizes in the wing
> --> RV6-List message posted by: "Stein Bruch" <stein@steinair.com>
>
> Hi Guys,
>
> Just a quick note about something that I've seen in the past month or two
> that is a little confusing. I've had no less than at least 6 people ask me
> for some AWG10 wire to use in their wings. Seems someone "out there" has
> recommened AWG10 or AWG12 for running to the landing lights.
>
> To anyone who is currently wiring your plane, don't fall into the trap
that
> some people do.....that being "if some is perfect, more must be better" -
> with wire sizes, this is just a huge waste of money, weight, resources,
> etc.. If the recommened wire is AWG16 or AWG18, there is NO reason to use
> an AWG10.
>
> Just a quick FYI, an AWG10 wire running the approximate length of a RVxx
> wing, will carry something in the area of 800+ Watts. Who has a landing
> light requiring that much power?!?! Heck, an AWG16 wire should carry well
> over 180 Watts in that length.
>
> Here's the simple breakdown before adding in resistance per 1K.
> AWG10 - 70amps current carrying capacity
> AWG12 - 50amps
> AWG14 - 40amps
>
> So, if you are one of those people running those huge AWG10 wires to your
> wingtips, ask yourselves why?!? Two big reasons NOT to are:
>
> 1). Cost--AWG16-18 averages around $.17/ft & AWG10 is around $.50/ft (300%
> higher).
> 2). Weight--AWG16-18 averages .005 lbs/ft, where AWG10 = .03lbs/ft.
> Meaning, for an average set of wings at 2 wires x 18' = 36' x 2 wings 72'
> of wire. At AWG16 or 18 the weight would only be about 8oz's total.
AWG10
> would be over 2 POUNDS!!
>
> Anyway, sorry about the rant...I just thought it might be a good idea to
> bring this to the surface. Somehow, somewhere, there is a movement to put
> fat wires into the wings, and I don't know why. If you are one of those
> people, please enlighten me and the rest of us!
>
> FYI, I do have AWG12 on up, and will stock some AWG10 in the future, but
in
> all reality, there isn't much need for it.
>
> Cheers,
> Stein Bruch
> RV6's, Minneapolis
>
> http://www.steinair.com
>
>
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