Today's Message Index:
----------------------
1. 05:23 AM - Are LEDs bright enough? (Sam Hoskins)
2. 05:31 AM - Re: Z-13/8 Checklist (Robert L. Nuckolls, III)
3. 05:58 AM - Toggle Actuated Circuit Breakers ()
4. 06:13 AM - Re: Are LEDs bright enough? (John Cox)
5. 07:08 AM - Common Wire Diameters ()
6. 07:33 AM - Re: Re: Z-13/8 Checklist (Normand Biron)
7. 07:33 AM - Re: Common Wire Diameters (Ron Quillin)
8. 07:41 AM - Re: Common Wire Diameters (Bob White)
9. 07:55 AM - Re: Toggle Actuated Circuit Breakers (rparigor@SUFFOLK.LIB.NY.US)
10. 08:07 AM - Re: Common Wire Diameters (Robert L. Nuckolls, III)
11. 01:33 PM - Re: Trying to obtain card edge connector for KX165 Nav/com (Radioflyer)
12. 01:54 PM - Re: Re: Trying to obtain card edge connector for KX165 Nav/com (Robert L. Nuckolls, III)
13. 02:06 PM - How to chose an EFIS (Peter Pengilly)
Message 1
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Subject: | Are LEDs bright enough? |
FYI. Here is a video examining the suitability of various landing lights.
I saw it on today's AvWeb.
http://www.youtube.com/watch?v=Hlr1t4WRvvU&eurl=http://www.avweb.com/eletter/archives/avflash/1309-full.html&feature=player_embedded
Sam
www.samhoskins.blogspot.com
Message 2
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Subject: | Re: Z-13/8 Checklist |
At 10:34 PM 2/4/2009, you wrote:
>Bob,
>
>I HAVE THE B & C L-60 ALTERNATOR WITH THE LR-3 CONTROLLER.
Very good. This alternator operates in a manner consistent
with those installed in TC aircraft since day-one. It may
be turned OFF and ON at any time under any conditions without
concern for damage to the alternator or any other part of
the system.
Aside from continuous loads with inadequate cooling, there
are no conditions under which operations or manipulation
by the pilot puts an alternator at risk.
Finally, there is no way that an alternator can produce
more than a few percent more current than its nameplate
rating . . . even as a transient event. The number
you're seeing from your data acquisition system is
bogus.
There's a huge data set of pronouncements about alternator
behavior and capability circulating in the wild that
is fraught with inaccuracy and lack of understanding.
That particular combination has a rich history of
failure free, performance as advertised.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 3
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Subject: | Toggle Actuated Circuit Breakers |
With respect to life cycles how do the switch type circuit breakers hold
up? I am looking at the Potter & Brumfield variety.
Thanks
Message 4
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Subject: | Are LEDs bright enough? |
Thanks for the informative re-direct to the Utube video. Made me wonder th
e impact of a flat reflector surface with the LEDs vs.a more parabolic like
the incandescents and HIDs? Durability and cost vs. throw distance.
John Cox
From: Sam Hoskins
Sent: Thu 2/5/2009 5:20 AM
Subject: AeroElectric-List: Are LEDs bright enough?
FYI. Here is a video examining the suitability of various landing lights.
I saw it on today's AvWeb.
http://www.youtube.com/watch?v=Hlr1t4WRvvU&eurl=http://www.avweb.com/el
etter/archives/avflash/1309-full.html&feature=player_embedded
Sam
http://www.samhoskins.blogspot.com/
Message 5
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Subject: | Common Wire Diameters |
Can any of you point me to a reference describing Tefzel MIL-W-22759/16
wire diameter sizes for those typically used in aircraft? I am
specifically interested in #4, #6, #10 & 12.
Thanks,
Glenn
Message 6
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Subject: | Re: Z-13/8 Checklist |
Bob,
Thanks, You have been very helpful. I feel very comfortable flying my
airplane with your Z-13/8 All Electric Airplane on a Budget with P Mags.
power distribution design.
Norm
----- Original Message -----
From: Robert L. Nuckolls, III<mailto:nuckolls.bob@aeroelectric.com>
To:
aeroelectric-list@matronics.com<mailto:aeroelectric-list@matronics.com>
Sent: Thursday, February 05, 2009 7:28 AM
Subject: AeroElectric-List: Re: Z-13/8 Checklist
<nuckolls.bob@aeroelectric.com<mailto:nuckolls.bob@aeroelectric.com>>
At 10:34 PM 2/4/2009, you wrote:
>Bob,
>
>I HAVE THE B & C L-60 ALTERNATOR WITH THE LR-3 CONTROLLER.
Very good. This alternator operates in a manner consistent
with those installed in TC aircraft since day-one. It may
be turned OFF and ON at any time under any conditions without
concern for damage to the alternator or any other part of
the system.
Aside from continuous loads with inadequate cooling, there
are no conditions under which operations or manipulation
by the pilot puts an alternator at risk.
Finally, there is no way that an alternator can produce
more than a few percent more current than its nameplate
rating . . . even as a transient event. The number
you're seeing from your data acquisition system is
bogus.
There's a huge data set of pronouncements about alternator
behavior and capability circulating in the wild that
is fraught with inaccuracy and lack of understanding.
That particular combination has a rich history of
failure free, performance as advertised.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
http://www.matronics.com/Navigator?AeroElectric-List<http://www.matronics
.com/Navigator?AeroElectric-List>
http://www.matronics.com/contribution<http://www.matronics.com/contributi
on>
Message 7
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Subject: | Re: Common Wire Diameters |
At 07:06 2/5/2009, you wrote:
>
>Can any of you point me to a reference describing Tefzel MIL-W-22759/16
>wire diameter sizes for those typically used in aircraft? I am
>specifically interested in #4, #6, #10 & 12.
>
>
>Thanks,
>Glenn
PDF of the official spec, if somewhat dated, when it was MIL and
still freely available and not commercial for $$$. But be aware these
are specified maximum diameters and stock from differing
manufacturers varies. Likely you can visit the manufacturers
individual site and get their specs.
Ron Q.
Message 8
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Subject: | Re: Common Wire Diameters |
Hi Glenn,
Try http://www.jaguarind.com/products/ptfe/16.html
They have a nice table.
Bob W.
On Thu, 5 Feb 2009 10:06:52 -0500
<longg@pjm.com> wrote:
>
> Can any of you point me to a reference describing Tefzel MIL-W-22759/16
> wire diameter sizes for those typically used in aircraft? I am
> specifically interested in #4, #6, #10 & 12.
>
>
> Thanks,
> Glenn
>
>
>
>
>
--
N93BD - Rotary Powered BD-4 - http://www.bob-white.com
3.8 Hours Total Time and holding
Cables for your rotary installation - http://roblinstores.com/
Message 9
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Subject: | Re: Toggle Actuated Circuit Breakers |
"> With
respect to life cycles how do the switch type circuit breakers hold
> up? I am looking at the Potter & Brumfield variety."
I can tell you from experience, if you try and loosen the screw on
one without supporting themetal tab it will not last one cycle!
I am not sure if it is exact switch, but Beechcraft is going
through some noise to have toggle breakers all replaced on I think it is
Barons due to a failure. Not sure if it was an open or closed failure.
(There is enough stuff going on in switch/breaker I could see there is a
remote chance it could fail miserably and weld itself closed or make a
high resistanceconnection and make plenty of heat)
That
said local AIs and A+Ps all told me reliability is good, they don't think
any worst thanpull able breakers, or switches that do fail from time
to time.
B+C is not an advocate of using them to supply power
to field, said they can sometimes (more often than they feel acceptable)
make a higher resistance connection than is needed for stable running
alternator. Found this tid bit out after I installed one for my SD20S, but
will keep that information handy if I develop a problem.
Not
from experience but from dissecting one and studying, probably would not
be a bad idea to replace any very important toggle/breakers at perhaps
major timeor 15 years?? Grease will go away and the plastic arm to
reset looks to me it could be a failure point.
I think if
it is closed will probably be pretty reliable, as far as from a mechanical
standpoint goes. Resetting imposes a lot more mechanical stresses than
opening.
See:
http://www.europaowners.org/modules.php?set_albumName=album258&op=modload&name=gallery&file=index&include=view_album.php
Break a breaker.
I am using perhaps a dozen or so on
our Europa project, primarily from a space savings point of view.
I didn't weigh difference between a Klixon pull able breaker and a
switch, but expect the later is probably lighter (a bank or 9 is pretty
heavy).
I forget exacts, but if a P+B toggle/breaker is good
for 9 or 12K cycles, supposedly a Klixon pull able breaker used as a
switch (that it is not precisely designed for) is good for 3 or 4K cycles.
If I am off on the number of cycles, it is not by much but it is what was
told me. You can look at a engineering sheet if you are really interested,
failure from lack of use and mechanical related age induced stresses are
much more likely though.
Ron Parigoris
Message 10
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Subject: | Re: Common Wire Diameters |
At 09:06 AM 2/5/2009, you wrote:
>
>Can any of you point me to a reference describing Tefzel MIL-W-22759/16
>wire diameter sizes for those typically used in aircraft? I am
>specifically interested in #4, #6, #10 & 12.
Diameters can vary depending on the slash number
for the variants. You can access the full spectrum
of data on 22759 and other wires in the catalog
on my website at . . .
http://aeroelectric.com/Mfgr_Data/Wire/Standard_Wire_and_Cable/Std_Wire_Cable.pdf
/16 data is on document page 80 (pdf page 87).
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 11
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Subject: | Re: Trying to obtain card edge connector for KX165 |
Nav/com
Bob, you're wonderful, mission accomplished. Based on your info and document links,
I was able to verify that it is a Molex part number 09-50-6155.
It took me 5 minutes of looking to verify the possibility of numbers on the ends
of the connector. Then I had to get my young daughter with perfect vision to
be able to read the numbers, which turned out to be the actual part number instead
of the 4338 number. First time I ever had to do that!
Your vendor links are incredibly helpful, also. Thanks.
PS- Is it Ok to power up the nav/com without terminating the G/S and Nav antenna
connections?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=228728#228728
Message 12
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Subject: | Re: Trying to obtain card edge connector for |
KX165 Nav/com
>
>PS- Is it Ok to power up the nav/com without terminating the G/S and
>Nav antenna connections?
Without benefit of having schematics to look at, I cannot
be 100.0% sure but it's pretty likely that no harm
will occur. After all, connectors DO come loose in
service and I would hope that the fine minds under
Ed King's legacy would have thought of that and
accounted for it.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 13
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Subject: | How to chose an EFIS |
I have written an article about factors you might consider when buying an
EFIS that has been published in the UK homebuilder magazine, Light Aviation.
It might be of interest to some of you here.
http://www.glosterairparts.co.uk/EFIS8pt1.htm
Peter
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