Today's Message Index:
----------------------
1. 06:08 AM - Re: Re: Fire Indication Probe (rd2@evenlink.com)
2. 07:24 AM - More than 1 audio source into the Intercom Music Input - (rd2@evenlink.com.revisited)
3. 07:30 AM - Re: Re: KX-155 Power connections help! (Matthew Brandes)
4. 07:32 AM - Re: Fire Indication Probe (Eric M. Jones)
5. 09:12 AM - Re: Small Video Display (was Fire Indication Probe_ (Eric M. Jones)
6. 09:39 AM - Re: Re: Fire Indication Probe (sgettings@cfl.rr.com)
7. 10:14 AM - Re: Re: Fire Indication Probe (Chuck Jensen)
8. 11:28 AM - Re: Fire Indication Probe (Eric M. Jones)
9. 12:16 PM - Re: Re: Fire Indication Probe (Mickey Coggins)
10. 12:23 PM - Re: Re: Fire Indication Probe (Mark Cochran)
11. 01:00 PM - Re: Re: Re: Fire Indication Probe (sgettings@cfl.rr.com)
12. 01:02 PM - Re: SPAM::Split washers vs. Nyloc nuts (Rogers, Bob J.)
13. 01:18 PM - Re: SPAM::Split washers vs. Nyloc nuts (Craig P. Steffen)
14. 02:34 PM - Re: Re: Re: Fire Indication Probe (Matt Prather)
15. 02:55 PM - Re: Dynon's D10A (Mike Larkin)
16. 03:41 PM - Re: Re: Small Video Display (was Fire Indication Probe_ (John W. Cox)
17. 04:20 PM - Re: SPAM::Split washers vs. Nyloc nuts (Robert Forbes)
18. 04:35 PM - Re: SPAM::Split washers vs. Nyloc nuts (Alex Peterson)
19. 04:54 PM - Re: Re: Small Video Display (was Fire (Dave Morris \)
20. 04:58 PM - Re: SPAM::Split washers vs. Nyloc nuts (John W. Cox)
21. 05:28 PM - Re: Split washers vs. Nyloc nuts (Ken)
22. 05:43 PM - Re: Re: Small Video Display (was Fire Indication Probe_ (John Schroeder)
23. 07:21 PM - Re: OVP thoughts. (Ken)
24. 11:06 PM - Re: Re: Small Video Display (was Fire Indication (Mickey Coggins)
Message 1
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| Subject: | Re: RE: Fire Indication Probe |
--> AeroElectric-List message posted by: rd2@evenlink.com
Eric,
can you suggest a small display for the videocam ? - cameras and small and
cheap, but I heven't been able to come up with a convenient display
(preferably to fit into a standard panel opening).
Rumen
_____________________Original message __________________________
(received from Eric M. Jones; Date: 08:25 PM 8/14/2005
-0400)
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
Fire detectors usually operate by detecting the UV radiation given off by a
flame. Only a fire in the cowl will show any UV. The detectors are simple
and easy to get from Allied Electronics, etc., and the additional circuitry
not hard to make. Ideally several of them should cover all areas of
interest.
You could use a video camera--they are so cheap a little airplane could have
a dozen of them for every conceivable task--including fire detection.
Has anybody experimented with home smoke detectors under the cowl?
And finally two words--E Bay. There are several "Flame detectors" for sale
cheap right now. Flame detectors (or "no flame" detectors) are used in some
furnaces, and I think they are UV photoelectric for the most part.
Regards,
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
(508) 764-2072
"Democracy must be something more than two wolves and a sheep voting on what
to have for dinner."
- James Bovard
Message 2
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| Subject: | More than 1 audio source into the Intercom Music Input |
-
revisited
--> AeroElectric-List message posted by: rd2@evenlink.com revisited
I talked to PS Engineering about the solution.
The PS Engineering PS 1000 II has an input impedance of 47 kOhm (music
input) (as probably do most intercoms, at least in that range). So, it is
not likely that the intercom would load the output of any source, because
it isn't likely that the source would have an output impedance of 47 kohm
or higher.
But in order for the audio sources not to affect ea. other, PS Eng.
suggested to add isolation resistors to ea. source. We are basically
building a signal mixer. They said I could start with 500 ohm per source
(in series) and increase until signal starts to attenuate (or until signal
is not unacceptably attenuated).
For practical purposes, I will be adding the necessary number of 3.5mm
receptacles (equaling the number of needed inputs) with 1 kOhm resistors in
series in ea. signal path and will test the intercom with all available
signal sources active and connected to the inputs. That way the sources
will have isolation of 2 kohm between ea. other. I might actually do the
test with 10 kohm pots in each path initially to determine which is the
highest resistance that does not attenuate the audio of the source, then
replacing the pots with resistors.
Rumen
Message 3
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| Subject: | Re: RE: KX-155 Power connections help! |
--> AeroElectric-List message posted by: "Matthew Brandes" <matthew@n523rv.com>
I haven't figured out how to dim the display yet... the install manual
doesn't show a pin for dimming.. but the document that bob has on his site
shows that pin 24 is used for 14v light dimming.... so I'm kinda confused
still. I'd be concerned about dimming this circuit since it runs power out
to the CDI. At least the radio works at this point!
Matthew Brandes,
Van's RV-9A (Wiring)
#90569
http://www.n523rv.com <http://www.n523rv.com/>
EAA Chapter 1329 President
EAA Chapter 868 Web Editor
--> AeroElectric-List message posted by: "Jim Baker" <jlbaker@telepath.com
<mailto:jlbaker@telepath.com?subject=Re:%20RE:%20KX-155%20Power%20connection
s%20help!&replyto=200508141946.j7EJkugF000396@mail.matronics.com> >
> The only thing I can think of is that the switched OUT pins are
> controlled by the on/off switch at the faceplate and are fed from the
> 14v power in pins (14 and R). The switched IN pins must feed
power to
> the display. (Which is why my display worked when I put power on
them
> directly from the bus.)
> Sure seems like an odd way to power the display!
If I understand this correctly, not if you want to be able to dim the
display independently of the auto-dim feature?
Jim Baker
580.788.2779
'71 SV, 492TC
Elmore City, OK
Message 4
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| Subject: | RE: Fire Indication Probe |
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
--> AeroElectric-List message posted by: "George Braly" <gwbraly@gami.com>
>Eric,
>UV or Infra Red ?
>Regards, George
George,
There are advantages and disadvantages to the various approaches.
UV--Clearly a step function. Flames, sparks and various energetic phenomena
emit UV. In a normally functioning engine, zero UV is emitted even if it
melts. The Hamamatsu UV Trons are insensitive to sunlight without any
filtering (remarkable). These are very common and inexpensive detectors. Can
be triggered by coronas and arc welders....but hey!....nothing's free.
Google "Hamamatsu UV Tron".
Visible--The engine exhaust gets brighter, but that's about it in the dark.
The problems with visible fire alarms is that flying west at sunset might
trigger photoelectric alarms. so you have to shield them carefully. Easy to
use but lots of technical issues to resolve.
IR--Similar to visible but easier to use. Flames produce much more IR than
just hot pipes. Filters are used to look at only certain wavelengths. Makers
if IR Flame detectors seem to be secretive about spectral characteristics.
Some fire situations seem to demand certain spectral sensitivities.
(Things-you-never-knew note: They sell fireproof IR/UV fire detectors, also
detectors that are heated to keep them free from ice.)
Combo units--Many units take the advantages of IR and UV and make
combination IR/UV units.
Hamamatsu UV Trons are so good and so cheap that almost all brand-name flame
detectors are just Hamamatsus-in-a-box.
I like the cotton string on Microswitch idea. Super-Glue vaporizes at a
certain temperature, so you could craft a temp alarm with some glue and a
microswitch. All the technology from old water sprinklers would probably
work too.
Regards,
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
(508) 764-2072
"Hey, it ain't rocket surgery!"
--anonymous
Message 5
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| Subject: | Re: Small Video Display (was Fire Indication Probe_ |
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
--> AeroElectric-List message posted by: rd2@evenlink.com
>can you suggest a small display for the videocam ? - cameras and small and
>cheap, but I heven't been able to come up with a convenient display
>(preferably to fit into a standard panel opening). Rumen
For example--
(copy this onto one line)
http://cgi.ebay.com/5-6-HEADREST-MONITOR-LCD-TV-VIDEO-SCREEN-CLEAR-NEW-HOT_W0QQitemZ5797503878QQcategoryZ94847QQrdZ1QQcmdZViewItem
I don't know specifically of one that will fit into a standard panel
opening. But we live in a world of abundance. Perhaps someone can suggest
something.
Regards,
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
(508) 764-2072
Do Not Archive
Message 6
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| Subject: | Re: RE: Fire Indication Probe |
--> AeroElectric-List message posted by: sgettings@cfl.rr.com
----- Original Message -----
From: "Eric M. Jones" <emjones@charter.net>
Subject: AeroElectric-List: RE: Fire Indication Probe
> --> AeroElectric-List message posted by: "Eric M.
Jones"
> <emjones@charter.net>
> --> AeroElectric-List message posted by: "George
Braly"
> <gwbraly@gami.com>
>
> >Eric,
> >UV or Infra Red ?
> >Regards, George
>
> George,
>
> There are advantages and disadvantages to the
various approaches.
>
> UV--Clearly a step function. Flames, sparks and
various energetic
> phenomena
> emit UV. In a normally functioning engine, zero UV
is emitted even
> if it
> melts. The Hamamatsu UV Trons are insensitive to
sunlight without
> any
> filtering (remarkable). These are very common and
inexpensive
> detectors. Can
> be triggered by coronas and arc welders....but
hey!....nothing's
> free.
> Google "Hamamatsu UV Tron".
>
> Visible--The engine exhaust gets brighter, but
that's about it in
> the dark.
> The problems with visible fire alarms is that
flying west at sunset
> might
> trigger photoelectric alarms. so you have to
shield them carefully.
> Easy to
> use but lots of technical issues to resolve.
>
> IR--Similar to visible but easier to use. Flames
produce much more
> IR than
> just hot pipes. Filters are used to look at only
certain
> wavelengths. Makers
> if IR Flame detectors seem to be secretive about
spectral
> characteristics.
> Some fire situations seem to demand certain
spectral sensitivities.
> (Things-you-never-knew note: They sell fireproof
IR/UV fire
> detectors, also
> detectors that are heated to keep them free from ice.)
>
> Combo units--Many units take the advantages of IR
and UV and make
> combination IR/UV units.
>
> Hamamatsu UV Trons are so good and so cheap that
almost all brand-
> name flame
> detectors are just Hamamatsus-in-a-box.
>
> I like the cotton string on Microswitch idea.
Super-Glue vaporizes
> at a
> certain temperature, so you could craft a temp
alarm with some glue
> and a
> microswitch. All the technology from old water
sprinklers would
> probably
> work too.
>
> Regards,
> Eric M. Jones
> www.PerihelionDesign.com
> 113 Brentwood Drive
> Southbridge MA 01550-2705
> (508) 764-2072
>
> "Hey, it ain't rocket surgery!"
> --anonymous
>
>
This is my first post, so hopefully I'll get it right.
Isn't another simple option a thermal overload relay
(such as a bimetallic or solid state), thermistor,
or thermal fuse? Radio shack has thermal fuses of
various temperatures for less than $2. A fused
circuit would have to turn on a light or other
warning device when it became open, but this is also
pretty simple.
Scott Gettings
Message 7
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| Subject: | RE: Fire Indication Probe |
--> AeroElectric-List message posted by: "Chuck Jensen" <cjensen@dts9000.com>
Scott,
If your subsequent posts are as good as your first, I think you've
already gotten the hang of it.
The downside of the detectors, alarm on a string, thermal fuse, et al,
is they are on/off, 0/1. No way of trending or knowing if it's a false
alarm...just that you got an alarm. Can you say 'idiot lights' that was
so popular in cars of yesteryear. No information, just an alert.
On the other hand, a temp readout allows you to trend a problem, assess
the magnitude of it and still be given an alarm via the preset alarm
point. Simple and cheap...though Eric raises important points arguing
for some alternative detection technology, even if they don't give rate
information.
Chuck
Scott Gettings wrote...
This is my first post, so hopefully I'll get it right.
Isn't another simple option a thermal overload relay
(such as a bimetallic or solid state), thermistor,
or thermal fuse? Radio shack has thermal fuses of
various temperatures for less than $2. A fused
circuit would have to turn on a light or other
warning device when it became open, but this is also
pretty simple.
Message 8
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| Subject: | Re: Fire Indication Probe |
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
--> AeroElectric-List message posted by: sgettings@cfl.rr.com
>This is my first post, so hopefully I'll get it right.
Scott, welcome to the fray.
>Isn't another simple option a thermal overload relay
>(such as a bimetallic or solid state), thermistor,
>or thermal fuse? Radio shack has thermal fuses of
>various temperatures for less than $2. A fused
>circuit would have to turn on a light or other
>warning device when it became open, but this is also
>pretty simple. Scott Gettings
Scott, you are inferring that high temps must equal a fire. That may or may
not be so. Does a small fire equal very high temps--especially where you
have the sensor? Maybe. Maybe not. Would hot exhaust pipes trigger an
overtemp sensor quicker than a small fuel-leak fire? Almost certainly.
A couple UV Trons and the Space Shuttle Challenger could have brought
Christa McAuliffe back to teach school. But it would have required ten
zillion thermal detectors to sense that errant flame.
Regards,
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
(508) 764-2072
"The problem with the world is that only the intelligent people want to be
smarter, and only the good people want to improve."
- E.Stobblehouse
Message 9
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| Subject: | Re: Fire Indication Probe |
--> AeroElectric-List message posted by: Mickey Coggins <mick-matronics@rv8.ch>
> A couple UV Trons and the Space Shuttle Challenger could have brought
> Christa McAuliffe back to teach school. But it would have required ten
> zillion thermal detectors to sense that errant flame.
I like the way they did it on SpaceShipOne - winding all that wire
around the casing, and if any burns through, it cuts off the NO2.
Could have worked on the shuttle SRBs, I think. Of course, there
is no shutting those things off, but I guess they could have "ejected"
them.
--
Mickey Coggins
http://www.rv8.ch/
#82007 finishing
Message 10
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| Subject: | Re: Fire Indication Probe |
--> AeroElectric-List message posted by: "Mark Cochran" <mac@atac.com>
Eric,
Once the solid rocket boosters have been ignited, the earliest shuttle abort
profile (that I've heard of) is the RTLS or return to launch site profile.
This may not occur until about 2+20, and after solid rocket burn-out.
Unfortunately, the seven crewmembers of the Challenger were doomed the
moment the solid rocket motors were ignited. I'd be interested to know if
there is an earlier abort profile.
Do Not Archive
Mark Cochran
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Eric M.
Jones
Subject: AeroElectric-List: Re: Fire Indication Probe
--> AeroElectric-List message posted by: "Eric M. Jones"
<emjones@charter.net>
--> AeroElectric-List message posted by: sgettings@cfl.rr.com
>This is my first post, so hopefully I'll get it right.
Scott, welcome to the fray.
>Isn't another simple option a thermal overload relay
>(such as a bimetallic or solid state), thermistor,
>or thermal fuse? Radio shack has thermal fuses of
>various temperatures for less than $2. A fused
>circuit would have to turn on a light or other
>warning device when it became open, but this is also
>pretty simple. Scott Gettings
Scott, you are inferring that high temps must equal a fire. That may or may
not be so. Does a small fire equal very high temps--especially where you
have the sensor? Maybe. Maybe not. Would hot exhaust pipes trigger an
overtemp sensor quicker than a small fuel-leak fire? Almost certainly.
A couple UV Trons and the Space Shuttle Challenger could have brought
Christa McAuliffe back to teach school. But it would have required ten
zillion thermal detectors to sense that errant flame.
Regards,
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
(508) 764-2072
"The problem with the world is that only the intelligent people want to be
smarter, and only the good people want to improve."
- E.Stobblehouse
Message 11
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| Subject: | Re: Fire Indication Probe |
--> AeroElectric-List message posted by: sgettings@cfl.rr.com
----- Original Message -----
From: Mark Cochran <mac@atac.com>
Subject: RE: AeroElectric-List: Re: Fire Indication
Probe
> --> AeroElectric-List message posted by: "Mark
Cochran" <mac@atac.com>
>
> Eric,
> Once the solid rocket boosters have been ignited,
the earliest
> shuttle abort
> profile (that I've heard of) is the RTLS or return
to launch site
> profile.This may not occur until about 2+20, and
after solid rocket
> burn-out.
> Unfortunately, the seven crewmembers of the
Challenger were doomed the
> moment the solid rocket motors were ignited. I'd
be interested to
> know if
> there is an earlier abort profile.
>
> Do Not Archive
> Mark Cochran
>
> -----Original Message-----
> From: owner-aeroelectric-list-server@matronics.com
>
[mailto:owner-aeroelectric-list-server@matronics.com]
On Behalf Of
> Eric M.
> Jones
> To: aeroelectric-list@matronics.com
> Subject: AeroElectric-List: Re: Fire Indication Probe
>
> --> AeroElectric-List message posted by: "Eric M.
Jones"
> <emjones@charter.net>
>
> --> AeroElectric-List message posted by:
sgettings@cfl.rr.com
>
> >This is my first post, so hopefully I'll get it
right.
>
> Scott, welcome to the fray.
>
> >Isn't another simple option a thermal overload relay
> >(such as a bimetallic or solid state), thermistor,
> >or thermal fuse? Radio shack has thermal fuses of
> >various temperatures for less than $2. A fused
> >circuit would have to turn on a light or other
> >warning device when it became open, but this is also
> >pretty simple. Scott Gettings
>
> Scott, you are inferring that high temps must
equal a fire. That
> may or may
> not be so. Does a small fire equal very high
temps--especially
> where you
> have the sensor? Maybe. Maybe not. Would hot
exhaust pipes trigger
> an
> overtemp sensor quicker than a small fuel-leak
fire? Almost certainly.
>
> A couple UV Trons and the Space Shuttle Challenger
could have
> brought
> Christa McAuliffe back to teach school. But it
would have required
> ten
> zillion thermal detectors to sense that errant flame.
>
> Regards,
> Eric M. Jones
> www.PerihelionDesign.com
> 113 Brentwood Drive
> Southbridge MA 01550-2705
> (508) 764-2072
>
> "The problem with the world is that only the
intelligent people
> want to be
> smarter, and only the good people want to improve."
> - E.Stobblehouse
>
>
Sounds like an interesting fray!
My current plans are to incorporate 4-6 thermal
fuses in series in strategic locations around my
(composite, pusher) cowling. A redundant, but
separate, loop will allow a confirmation of any one
blown fuse, as fuses close together should not fail
together except from heat. This addresses the
single-point failure issue. So if both "fire"
lights come on, it is almost certainly real!
Any temps over a certain level in these locations
(without radiant visibility to the exhaust, of
course) should represent a major over-temp problem,
and will be considered an engine compartment fire
and treated accordingly.
True, a very small fire that had not yet reached one
of the thermal fuses would not be detected. In a
pusher, this is still a lot of early warning for
$30-$50.
Scott Gettings
Message 12
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| Subject: | Split washers vs. Nyloc nuts |
--> AeroElectric-List message posted by: "Rogers, Bob J." <BRogers@fdic.gov>
If you are going to have your fuel pumps in your engine compartment, I
would suggest you use an all-metal self locking nut instead of a nyloc
nut. The heat from the engine compartment may weaken or melt the nylon
in the nyloc nut and allow it to loosen. The self locking nuts in my
engine compartment are all metal. If you have a self locking nut, a
flat washer should be sufficient.
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
Mickey Coggins
Subject: SPAM::AeroElectric-List: Split washers vs. Nyloc nuts
--> AeroElectric-List message posted by: Mickey Coggins
<mick-matronics@rv8.ch>
Hi,
My fuel pumps came with what look like brass nuts
and a split lock washer. These are used to hold
on the ring terminals.
I've read that these split lock washers are not
recommended in an aviation application. I would
like to replace these with a standard flat washer
and a nyloc nut. Does this seem like a good idea?
Photo here:
http://www.rv8.ch/images/articles/20050814081622711_1_original.JPG
Thanks for any feedback.
Mickey
--
Mickey Coggins
http://www.rv8.ch/
#82007 finishing
Message 13
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| Subject: | Re: Split washers vs. Nyloc nuts |
--> AeroElectric-List message posted by: "Craig P. Steffen" <craig@craigsteffen.net>
> If you are going to have your fuel pumps in your engine compartment, I
> would suggest you use an all-metal self locking nut instead of a nyloc
> nut. The heat from the engine compartment may weaken or melt the nylon
> in the nyloc nut and allow it to loosen. The self locking nuts in my
> engine compartment are all metal. If you have a self locking nut, a
> flat washer should be sufficient.
I don't know if it's a codified regulation, but my understanding is
that the FAA considers nylon locknuts forward of the firewall a big
no-no. All-metal locknuts (or castle nuts) ONLY in the engine
compartment.
--
craig@craigsteffen.net
public key available at http://www.craigsteffen.net/GPG/
current goal: use a CueCat scanner to inventory my books
career goal: be the first Vorlon Time Lord
Message 14
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| Subject: | Re: Fire Indication Probe |
--> AeroElectric-List message posted by: "Matt Prather" <mprather@spro.net>
On a pusher (at least), maybe it would be worth looking at the difference
between inlet air and the outlet air temperature. Any more than a certain
delta indicates something bad is going on. An easy microcontroller
project. You might have to include an offset table for powersetting to
make it really good. It might not be possible to detect a small fire
while at low powersetting (in a long descent for instance) without it.
Other information about engine/installation health could be garnered from
comparing inlet temp vs outlet temp too - a way to detect a baffle leak
would show up as an extraordinarily low delta-T. This idea is probably
too complex, but a lot would be learned from setting it up and looking at
the data.
One good thing about pushers is that the natural airflow typically pulls
hot gasses away from structural and soft pink stuff. It might be tougher
to detect, but it's probably somewhat less likely to hurt you. A number
of pushers have suffered in flight fires, and I think most of them have
landed with no injury to anyone aboard. Further, pushers have suffered a
variety of leaks of oil and fuel that most assuredly would have caused a
fire on a conventional plane, but only 'inconvenience' (engine out) on the
pusher. An engine compartment oil or fuel leak in an RV is really bad.
Regards,
Matt-
VE N34RD, C150 N714BK
Message 15
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--> AeroElectric-List message posted by: "Mike Larkin" <mlas@cox.net>
I have flown behind the D-10 and find it to be better and more reliable
then steam gauges. On one flight I had a vacuum pump failure and was
left with the Dynon or the turn and bank. I used the Dynon for the ILS
approach instead of the certified turn and bank. The problem you will
have is getting the field approval to install that unit in a certified
airplane. It is possible, but I don't think it will be easy. I do know
that the "Letter Groups" are taking a hard look at some of these units
as a backup for certified airplanes.
Mike Larkin
Lancair Legacy
TS-11
Kitfox 4
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
rd2@evenlink.com
Subject: Re: AeroElectric-List: Dynon's D10A
--> AeroElectric-List message posted by: rd2@evenlink.com
Thanks Dan,
this is exactly the kind od response I was looking for.
BTW:
>
I seriously doubt Dynon will ever encourage anybody to use their EFIS
for
IFR. Nor do I. But I do it.
>
Similarly, does Garmin encourage anybody to use their panel page (gpsmap
196/296/396) for ifr? ;) But it could save one's hide in case of
emergency.
If Dynon is as reliable (MTBF etc.) as the handheld gps', then it
proibably
is a better deal @ $2195 than sporty's (also non-certified) electric #
2060A Gyro ($1595). Not saying that sporty's is unreliable, merely
noticing
that dynon offers a host of functions vs. very the functions found in
sporty's product.
Or, thinking again, maybe garmin's deal is the best one, considering the
number of functions offered and same ifr/vfr/certification issues.
Rumen
--
--
8/15/2005
Message 16
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| Subject: | Re: Small Video Display (was Fire Indication Probe_ |
--> AeroElectric-List message posted by: "John W. Cox" <johnwcox@pacificnw.com>
Here is a website for a product used to digitally record inflight video
from 4 onboard lipstick cameras in our Red Star aircraft. The four
inputs are directed through a combiner into the 40gb storage unit. It
takes the high g's and shock forces and captures entire flight data
through plenty of imagery. It includes a touch-screen monitor. You can
view all four cams or select just one.
It may meet the requirement.
<http://www.dbciglobalsource.com/PVR%20380.htm>
John Cox
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Eric
M. Jones
Subject: AeroElectric-List: Re: Small Video Display (was Fire Indication
Probe_
--> AeroElectric-List message posted by: "Eric M. Jones"
<emjones@charter.net>
--> AeroElectric-List message posted by: rd2@evenlink.com
>can you suggest a small display for the videocam ? - cameras and small
and
>cheap, but I heven't been able to come up with a convenient display
>(preferably to fit into a standard panel opening). Rumen
For example--
(copy this onto one line)
http://cgi.ebay.com/5-6-HEADREST-MONITOR-LCD-TV-VIDEO-SCREEN-CLEAR-NEW-H
OT_W0QQitemZ5797503878QQcategoryZ94847QQrdZ1QQcmdZViewItem
I don't know specifically of one that will fit into a standard panel
opening. But we live in a world of abundance. Perhaps someone can
suggest
something.
Regards,
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
(508) 764-2072
Do Not Archive
Message 17
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| Subject: | Re: Split washers vs. Nyloc nuts |
--> AeroElectric-List message posted by: "Robert Forbes" <rwforbes@slic.com>
Folks, check your regs. No nylon locking nuts are to be used in the engine
compartment.
RWF
----- Original Message -----
From: "Rogers, Bob J." <BRogers@fdic.gov>
Subject: RE: SPAM::AeroElectric-List: Split washers vs. Nyloc nuts
> --> AeroElectric-List message posted by: "Rogers, Bob J."
> <BRogers@fdic.gov>
>
> If you are going to have your fuel pumps in your engine compartment, I
> would suggest you use an all-metal self locking nut instead of a nyloc
> nut. The heat from the engine compartment may weaken or melt the nylon
> in the nyloc nut and allow it to loosen. The self locking nuts in my
> engine compartment are all metal. If you have a self locking nut, a
> flat washer should be sufficient.
>
> -----Original Message-----
> From: owner-aeroelectric-list-server@matronics.com
> [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
> Mickey Coggins
> To: aeroelectric-list@matronics.com
> Subject: SPAM::AeroElectric-List: Split washers vs. Nyloc nuts
>
> --> AeroElectric-List message posted by: Mickey Coggins
> <mick-matronics@rv8.ch>
>
> Hi,
>
> My fuel pumps came with what look like brass nuts
> and a split lock washer. These are used to hold
> on the ring terminals.
>
> I've read that these split lock washers are not
> recommended in an aviation application. I would
> like to replace these with a standard flat washer
> and a nyloc nut. Does this seem like a good idea?
>
> Photo here:
>
> http://www.rv8.ch/images/articles/20050814081622711_1_original.JPG
>
> Thanks for any feedback.
>
> Mickey
>
> --
> Mickey Coggins
> http://www.rv8.ch/
> #82007 finishing
>
>
> --
>
>
Message 18
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| Subject: | Split washers vs. Nyloc nuts |
--> AeroElectric-List message posted by: "Alex Peterson" <alexpeterson@earthlink.net>
>
> Folks, check your regs. No nylon locking nuts are to be used in the
> engine
> compartment.
>
> RWF
Robert,
Point us to the specific reg and we will check it.
Obviously, from a practical viewpoint there is a temperature limit for the
nylon lock nuts. I don't recall that limit right now, but most of the engine
compartment is below that limit. Clearly, exhaust systems or parts near it
should have all metal locknuts.
Alex Peterson
RV6A N66AP 654 hours
Maple Grove, MN
Message 19
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| Subject: | Re: Small Video Display (was Fire |
Indication Probe_
--> AeroElectric-List message posted by: "Dave Morris \"BigD\"" <BigD@DaveMorris.com>
Indication Probe_
I just bought a Lilliput 8" VGA display that is designed for the burgeoning
SUV kiddie movie market. (Soapbox) I think we will be seeing more and more
adults crashing their SUVs into each other because they were watching the
"kiddie movies" while driving. (/Soapbox)
Anyway, it's going to be part of my glass cockpit if it passes the aircraft
band radiation tests I'm about to subject it to. I'm also looking into
putting a ball camera under the fuselage to help me guide my taildragger
down the runway without doing S-turns.
http://www.davemorris.com/PhotoViewer.cfm?Subdirectory=Glass%20Cockpit
You can get these for under $200 on eBay or from these sources:
http://www.case-mod.com/store/lilliput-809gl80npct-lcd-touch-screen-vga-monitor-charcoal-p-1206.html?osCsid=cb0bdd5178a256a8f34215b93cdd1a0a
http://www.logicsupply.com/default.php/cPath/52
http://www.mp3car.com/store/index.php?cPath=25
Dave Morris
www.MyGlassCockpit.com
At 11:11 AM 8/15/2005, you wrote:
>--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
>
>--> AeroElectric-List message posted by: rd2@evenlink.com
>
> >can you suggest a small display for the videocam ? - cameras and small and
> >cheap, but I heven't been able to come up with a convenient display
> >(preferably to fit into a standard panel opening). Rumen
>
>For example--
>
>(copy this onto one line)
>http://cgi.ebay.com/5-6-HEADREST-MONITOR-LCD-TV-VIDEO-SCREEN-CLEAR-NEW-HOT_W0QQitemZ5797503878QQcategoryZ94847QQrdZ1QQcmdZViewItem
>
>I don't know specifically of one that will fit into a standard panel
>opening. But we live in a world of abundance. Perhaps someone can suggest
>something.
>
>Regards,
>Eric M. Jones
>www.PerihelionDesign.com
>113 Brentwood Drive
>Southbridge MA 01550-2705
>(508) 764-2072
>
>Do Not Archive
>
>
Message 20
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| Subject: | Split washers vs. Nyloc nuts |
--> AeroElectric-List message posted by: "John W. Cox" <johnwcox@pacificnw.com>
Robert, to take the information one step farther. The quote is from the
EAA builder's bible AC43.13-1B Change I, Chapter 7, Section 4. Nuts,
subparagraph f. "Fiber or nylon locknuts are constructed with an
unthreaded fiber or nylon locking insert held securely in place. The
fiber or nylon insert provides the locking action because it has a
smaller diameter than the nut. Fiber or nylon self-locking nuts are not
installed in areas where temperatures exceed 250 F. After the nut has
been tightened, make sure the bolt or stud has at least one thread
showing past the nut. DO NOT reuse a fiber or nylon locknut, if the nut
cannot meet the minimum prevailing torque values. (See table 7-2.)"
I am sure everyone reads a passage each night before bedtime. I'll bet
they even make flashcards of Tables 7.1 and Tables 7-2.
Looks like you are keeping current. Want to take a bet on how many
builders reuse nylon locknuts without checking torque?
In the absence of a manufacturer's directive, the AC43.13-1A is it.
Using metal locknuts the temperature thresholds are 450, 800 and 1200
degrees. Now can someone other than Dan provide assistance in which
nuts to use above 450 degrees?
Great post. Now back to my IA exam.
John - KUAO
DO NOT ARCHIVE
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
Robert Forbes
Subject: Re: SPAM::AeroElectric-List: Split washers vs. Nyloc nuts
--> AeroElectric-List message posted by: "Robert Forbes"
<rwforbes@slic.com>
Folks, check your regs. No nylon locking nuts are to be used in the
engine
compartment.
RWF
Message 21
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| Subject: | Re: Split washers vs. Nyloc nuts |
--> AeroElectric-List message posted by: Ken <klehman@albedo.net>
Sorry John but I don't really know.
It seems to me that there would be enough spring in the metal that it
could be used again if necessary but it would be preferable to use a new
one to also make sure it was clean.
Ken
John Schroeder wrote:
>--> AeroElectric-List message posted by: "John Schroeder"
<jschroeder@perigee.net>
>
>Ken -
>
>Does one have to replace the internal star washers after they are used
>once? Seems that it would be easy to mash the teeth flat after torquing
>the nut & washe once.
>
>Thanks,
>
>John
>
>On Sun, 14 Aug 2005 10:19:04 -0400, Ken <klehman@albedo.net> wrote:
>
>
>
>>I think from the archives and the book you will see a preference for
>>internal star washers and brass or phosphor bronze hardware but again
>>I'd try not to add another type of metal to the joint if possible.
>>
>>
>
>
>
>
Message 22
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| Subject: | Re: Small Video Display (was Fire Indication Probe_ |
--> AeroElectric-List message posted by: "John Schroeder" <jschroeder@perigee.net>
John -
What is a fair price for one of these and where is a source?
Many thanks,
John
> On Mon, 15 Aug 2005 15:39:56 -0700, John W. Cox <johnwcox@pacificnw.com>
> wrote:
> Here is a website for a product used to digitally record inflight video
> from 4 onboard lipstick cameras in our Red Star aircraft.
--
Message 23
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| Subject: | Re: OVP thoughts. |
--> AeroElectric-List message posted by: Ken <klehman@albedo.net>
Hi Rob
Someone else originally posted this link to Jim Weir's site where he
uses one or more crowbar OVMs to pop the fuse(s) to the avionics. I
think this is reasonable for VFR operations. It is not useful for those
of us with electric dependant engines.
http://www.rst-engr.com/kitplanes/KP0109/KP0109.htm
You might want a handheld VHF and GPS though as then you lose main
battery power to the avionics. You could use CB's and reset them after
killing the alternator but I hate relying on multi-step manual
procedures when under stress.
On my machine I did not use battery contactors but all the non engine
loads do route through a contactor to a fuse block. An OVM could also be
wired to trip that contactor and protect the avionics. That presents a
single point of failure for all avionics power though. No main battery
power to the avionics during a trip is the problem with these methods so
it is not a great solution for IFR where you want uninterupted power. It
might have merit for expensive devices that have internal battery
backups and warnings though.
Ken
Rob W M Shipley wrote:
>--> AeroElectric-List message posted by: "Rob W M Shipley" <rob@robsglass.com>
>
>I'll start with humble apologies to all who have lost patience with this
>topic. For those of us still having an interest in any resolution which may
>be found I would like to ask the following.
>
>Given that many of us would like to use IR alternators for cost and
>convenience reasons the issue becomes one of how we can protect our avionics
>with a high degree of certainty.
>1) Until a few days ago when Ken Lehman wrote about "an OVM module of some
>kind protecting the supply to that $15k radio rack that you mentioned." I
>hadn't seen anyone mention this as a solution, although I have wondered
>about it myself. Why couldn't this prove a good way to save our wallets
>leaving the alternator to be shut down manually?
>2) Load dump (back emf ?) seems to be the alternator killer when crowbared
>under load. Bob wrote "Actually, the neatest way (lowest parts count) to
>run the
>
>
snip
Message 24
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| Subject: | Re: Small Video Display (was Fire Indication |
Probe_
--> AeroElectric-List message posted by: Mickey Coggins <mick-matronics@rv8.ch>
John,
Thanks for the link to this PVR. What kind of combiner are
you using? That seems like the hard part...
Thanks,
Mickey
John W. Cox wrote:
> --> AeroElectric-List message posted by: "John W. Cox" <johnwcox@pacificnw.com>
>
> Here is a website for a product used to digitally record inflight video
> from 4 onboard lipstick cameras in our Red Star aircraft. The four
> inputs are directed through a combiner into the 40gb storage unit. It
> takes the high g's and shock forces and captures entire flight data
> through plenty of imagery. It includes a touch-screen monitor. You can
> view all four cams or select just one.
>
> It may meet the requirement.
> <http://www.dbciglobalsource.com/PVR%20380.htm>
> John Cox
--
Mickey Coggins
http://www.rv8.ch/
#82007 finishing
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