Today's Message Index:
----------------------
1. 05:32 AM - Re: Securing Ends of Wires in Wing for Later Use (Speedy11@aol.com)
2. 07:02 AM - Re: Securing Ends of Wires in Wing for Later Use (messydeer)
3. 07:21 AM - Re: Strippers are all spoken for. (Peter Laurence)
4. 07:34 AM - Re: Re: Securing Ends of Wires in Wing for Later Use (Robert Feldtman)
5. 08:23 AM - Shunts (Dave VanLanen)
6. 08:50 AM - Re: Shunts (Dan Brown)
7. 09:32 AM - Re: Shunts (Matt Prather)
8. 09:33 AM - Re: Shunts (Matt Prather)
9. 09:51 AM - Re: Gilcrhist Electric (Robert L. Nuckolls, III)
10. 11:43 AM - Re: Re: Gilcrhist Electric (John and Nancy Ghertner)
11. 01:00 PM - Copper foil for ground planes (Robert L. Nuckolls, III)
12. 07:47 PM - Splicing Shielded Cable (r falstad)
Message 1
INDEX | Back to Main INDEX |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Securing Ends of Wires in Wing for Later Use |
Dan,
Consider doing as Roger suggested and instead of running the wires, run a
pull line through the conduit to use later to pull the wires through. Also,
you can use a file to make a nice, smoothed edge hole in the conduit.
You can partially see what I've done at _http://www.rv-8a.net/2006.htm_
(http://www.rv-8a.net/2006.htm) and scroll down to 8 Apr 06 and 14 Apr 06. You
can see the conduit in those photos and how I fed lines into them.
Regards,
Stan Sutterfield
Dan,
I ran a piece of 3/4-inch OD, 5/8 ID polyethylene tube the length of
my wings so I can pull the wires when they are needed. That begs the
question of a heated pitot. I figure that if I REALLY need a heated
pitot, I can use a soldering iron through an access port to melt a
hole in the conduit.
Roger Cole
Murphy Elite #709
Wings and tail done; starting fuselage
On Apr 9, 2008, at 6:32 PM, messydeer wrote:
> <messydeer@yahoo.com>
>
> Hello!
>
> I have one wing ready to skin and have run a bundle of wires from
> the root out to the tip through the leading edge. The wire may be
> used for a heated pitot tube (~3' from the root), landing lights
> (~1' in from the tip), and a tip nav/pos/strobe combo. I will most
> likely not install the lights and heated pitot until after hours of
> flying, if at all. So, what are some good ways to tie off wire that
> won't be used?
>
> The first wire I need to figure out is the one for a heated pitot.
> My bundle goes through the forward of two lightening hole and the
> pitot tube is located several inches back near the main spar. If I
> make a few loops of pitot wire and tie it to the bundle, I wouldn't
> be able to reach it through the access hole, which is only 2". So
> I'm thinking it should be real close to the access hole, maybe even
> on the pitot tube assembly itself? Again, it's not a heated tube
> but would be available if I switched it over to one in the future.
>
> Then there are the rest of the wires that end at or near the tip.
> For now I've coiled them a few times and cinched down a cable tie
> or two there for the time being. I'm not in a hurry to get this
> location figured out, because I'll have access to it after the wing
> is skinned. But the pitot tube wire needs to be figured out in the
> next few days.
>
> Cheers,
> Dan
(http://travel.aol.com/travel-guide/united-states?ncid=aoltrv00030000000016)
Message 2
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Securing Ends of Wires in Wing for Later Use |
Thanks for the replies, guys.
I've already got the wires routed without tubing. What it really comes down to
is how to secure the loose spare wires at their ends before they are hooked up.
With a tube this wouldn't be a problem. I suppose I could wrap and tape the
heater wire around the non-heated pitot tube.
--------
Dan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=175906#175906
Message 3
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Strippers are all spoken for. |
-----Original Message-----
Bob and listers.
Gilchrist Electric's phone numbers have been disconnected. Out of Business?
They clipped me for 14.00$.
Payed through Google checkout. Can't seem to get anyone to answer my inquiry
at Gilchrist and Google.
Caveat Emptor
Peter Laurence.
Message 4
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Securing Ends of Wires in Wing for Later Use |
I'd cut it off fold it on itself, stuff it in some heat wrap and heat shrink
the wrap on it. That should hold it and eliminate the messiness of
electrical tape "goo"
bobf
On 4/10/08, messydeer <messydeer@yahoo.com> wrote:
>
>
> Thanks for the replies, guys.
>
> I've already got the wires routed without tubing. What it really comes
> down to is how to secure the loose spare wires at their ends before they are
> hooked up. With a tube this wouldn't be a problem. I suppose I could wrap
> and tape the heater wire around the non-heated pitot tube.
>
> --------
> Dan
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=175906#175906
>
>
Message 5
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
I am reading through the AeroElectric Connection manual as I have time, but
I am having trouble comprehending some of the concepts presented. I just
read about the use of shunts in an electrical system to allow the
measurement of large currents with small meters. One thing I don't
understand is, if a shunt is used in the circuit to be measured, what
prevents a reduction in energy in the circuit on the downstream side of the
shunt? Can someone help me better understand this?
Thanks,
Dave Van Lanen
601XL - Tail
Message 6
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Quoting Dave VanLanen <davevanlanen@sbcglobal.net>:
> understand is, if a shunt is used in the circuit to be measured, what
> prevents a reduction in energy in the circuit on the downstream side of the
> shunt? Can someone help me better understand this?
Nothing prevents it; there is in fact such a reduction. However, it's
such a minuscule reduction that it's not noticeable in ordinary
operation. A shunt typically is designed for a 50 mV voltage drop at
full capacity. So, a 100A shunt will cause a 50 mV drop at 100A. In
a 14V circuit, 100A represents 1400W, and the shunt will consume 5W of
that.
--
Dan Brown, KE6MKS, dan@familybrown.org
"Since all the world is but a story, it were well for thee to buy the
more enduring story rather than the story that is less enduring."
-- The Judgment of St. Colum Cille
Message 7
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Hey Dave,
Nothing prevents loss of energy downstream of the shunt. But, a properly
selected shunt will have a relatively small voltage drop at full scale
current - reducing the power consumption of the device. Typical shunts
drop 50mV at full scale. On a 100A peak current circuit that's 5W = 100A
* 50mV. If you figure you're dropping the rest of the 13V supply into the
100A load, you're only losing 5W out of 1300W or 0.3%. Not too terrible.
At lower currents the percentage of power lost is less: 10A through the
same shunt will drop 5mV which is 50mW of the 130W delivered to the load -
or 0.03%.
Many aircraft engine monitors are setup to use Hall Effect sensors - which
do not consume any current from the measured circuit.
Regards,
Matt-
> I am reading through the AeroElectric Connection manual as I have time,
> but
> I am having trouble comprehending some of the concepts presented. I just
> read about the use of shunts in an electrical system to allow the
> measurement of large currents with small meters. One thing I don't
> understand is, if a shunt is used in the circuit to be measured, what
> prevents a reduction in energy in the circuit on the downstream side of
> the
> shunt? Can someone help me better understand this?
>
> Thanks,
> Dave Van Lanen
> 601XL - Tail
>
Message 8
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Hey Dan
That's funny.. We used much of the same verbiage. Even most of the same
example.
Matt-
do not archive
>
> Quoting Dave VanLanen <davevanlanen@sbcglobal.net>:
>
>> understand is, if a shunt is used in the circuit to be measured, what
>> prevents a reduction in energy in the circuit on the downstream side of
>> the
>> shunt? Can someone help me better understand this?
>
> Nothing prevents it; there is in fact such a reduction. However, it's
> such a minuscule reduction that it's not noticeable in ordinary
> operation. A shunt typically is designed for a 50 mV voltage drop at
> full capacity. So, a 100A shunt will cause a 50 mV drop at 100A. In
> a 14V circuit, 100A represents 1400W, and the shunt will consume 5W of
> that.
>
> --
> Dan Brown, KE6MKS, dan@familybrown.org
> "Since all the world is but a story, it were well for thee to buy the
> more enduring story rather than the story that is less enduring."
> -- The Judgment of St. Colum Cille
>
>
Message 9
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | RE: Gilcrhist Electric |
At 10:18 AM 4/10/2008 -0400, you wrote:
><PLaurence@the-beach.net>
>
>
>-----Original Message-----
>Bob and listers.
>
>Gilchrist Electric's phone numbers have been disconnected. Out of Business?
>They clipped me for 14.00$.
>
>Payed through Google checkout. Can't seem to get anyone to answer my inquiry
>at Gilchrist and Google.
This has been reported to me by several builders. I've written the
Chamber of Commerce in Bozeman and searched the 'net for any
indication that the company has folded. No data has been
forthcoming as of this writing. Gilchrist has also completely
disappeared from Ebay in spite of the fact that their website
is still up . . . and silent as to the fortunes of the company.
I'm sorry to hear this. They gave me very good prices on
lots of coax strippers during the time I was offering
them from our website.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 10
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: RE: Gilcrhist Electric |
I received a stripper from them today. Unfortunately, it is the wrong size.
Lory Ghertner
> <nuckolls.bob@cox.net>
>
> At 10:18 AM 4/10/2008 -0400, you wrote:
>
>> <PLaurence@the-beach.net>
>>
>>
>>
>> -----Original Message-----
>> Bob and listers.
>>
>> Gilchrist Electric's phone numbers have been disconnected. Out of Business?
>> They clipped me for 14.00$.
>>
>> Payed through Google checkout. Can't seem to get anyone to answer my inquiry
>> at Gilchrist and Google.
>
> This has been reported to me by several builders. I've written the
> Chamber of Commerce in Bozeman and searched the 'net for any
> indication that the company has folded. No data has been
> forthcoming as of this writing. Gilchrist has also completely
> disappeared from Ebay in spite of the fact that their website
> is still up . . . and silent as to the fortunes of the company.
>
> I'm sorry to hear this. They gave me very good prices on
> lots of coax strippers during the time I was offering
> them from our website.
>
> Bob . . .
>
> ----------------------------------------)
> ( . . . a long habit of not thinking )
> ( a thing wrong, gives it a superficial )
> ( appearance of being right . . . )
> ( )
> ( -Thomas Paine 1776- )
> ----------------------------------------
>
>
>
>
>
>
Message 11
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Copper foil for ground planes |
I just ran across this offering on the 'net for .013" thick
copper sheet.
http://www.craftsetc.com/store/item.aspx?ItemId=37793&dep=50&cat=85&subcat=25&Search=Y
This stuff is thick enough to craft mechanically robust
ground plane radials for antennas on plastic airplanes.
In fact, one could also craft the center commoning disk from
two pieces of the same material. Sandwich and sweat solder
the radials between the commoning sheets.
I've crafted several DIY com antennas with featuring
coax connectors. I'm satisfied with the last iteration
and will be publishing a comic book on it in the
not too distant future.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 12
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Splicing Shielded Cable |
Folks,
I'm using the Ray Allen electric trim and their stick grips in my
GlaStar. I'm using shielded two-conductor cable from the PTT switch to
the intercom. I need to splice that cable and originally used Bob's
soldered lap splicing technique but kept the exposed wires very short to
be able to replace the shield. Long story short -- one of the wires
shorted to the shield so I had a "stuck mic".
My specific question is: what's the best way to replace the shield
after splicing shielded wire? To do it right this time, I'll have to
expose about 2" - 3" of each wire.
Best regards,
Bob
GlaStar
N248BF
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|