Today's Message Index:
----------------------
1. 03:25 AM - Re: Pitot pressure switch (JOHN TIPTON)
2. 04:24 AM - db connector hold-down screws ()
3. 04:56 AM - Re: Vans RPM Transducer IE VTACHGEN 12 (Bubblehead)
4. 05:37 AM - Re: Pitot pressure switch (John Ciolino)
5. 05:39 AM - Re: db connector hold-down screws (j. davis)
6. 05:50 AM - Re: Vans RPM Transducer IE VTACHGEN 12 (Eric M. Jones)
7. 05:58 AM - Re: Pitot pressure switch (user9253)
8. 06:40 AM - Re: Re: Pitot pressure switch (Vern Little)
9. 06:42 AM - Re: Pitot pressure switch (user9253)
10. 01:38 PM - Re: Pitot pressure switch (Peter Pengilly)
11. 02:58 PM - Re: Re: Pitot pressure switch (Robert L. Nuckolls, III)
12. 04:40 PM - Please comment on my Wiring diagram J3300 and Exp Bus (ple190)
13. 04:49 PM - Comments J3300 exp bus wiring(smaller image) (ple190)
Message 1
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| Subject: | Re: Pitot pressure switch |
Hi Tom
Is this what you are looking for:
http://www.tcwtech.com/usw-1.HTM
Regards
John
----- Original Message -----
From: "tomcostanza" <Tom@CostanzaAndAssociates.com>
Sent: Tuesday, September 28, 2010 12:37 AM
Subject: AeroElectric-List: Pitot pressure switch
> <Tom@CostanzaAndAssociates.com>
>
> Does anyone know a source for a pressure switch I can put in the
> pitot/static system. I'd like to disable the flaps-down function if the
> airspeed is above some reasonable value. I can find electronic sensors,
> but I'd like to eliminate any electronics for simplicity.
>
> Thanks,
> -Tom
>
> --------
> Clear Skies,
> Tom Costanza
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=313929#313929
>
>
>
Message 2
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| Subject: | db connector hold-down screws |
9/28/2010
Hello J. Davis, You wrote: ".....how to fabricate hold-down screws for db
connectors
installed with no shells, but now can't locate it."
See my posting of 5/29/2010 copied below.
'OC' Baker Says: "The best investment we can make is the time and effort to
gather and understand knowledge."
PS: Phillips drive machine screws are an abomination. Every builder who has
converted to the Torx (6 lobe) drive screws has been delighted with the
results.
=======================================================
Time: 11:03:43 AM PST US
From: "j. davis" <jd@lawsonimaging.ca>
Subject: AeroElectric-List: db connector hold-down screws
Greetings...
I remember seeing an article on how to fabricate hold-down screws for db
connectors
installed with no shells, but now can't locate it. I know it's not exactly
rocket
science,
but would like to re-read the article. I'm pretty sure it was aeroelectric
list
related...
Thanks!
Regards, J.
========================================================
Match: #2Message: #49535From: <bakerocb(at)cox.net>Subject: D-subminiature
ConnectorsDate: May 29, 2010
5/29/2010
Hello Fellow Builders, Here is what we are writing about:
http://en.wikipedia.org/wiki/D-subminiature
Bob Nuckolls writes: "It's a fact that the majority of d-sub connectors come
with short, slotted-head 4-40 jack screws that are EXCEEDINGLY
difficult to work with in confined spaces traversed by wire
bundles." ..and ... "the inconvenience of stock, slot-head jack-screws."
{RESPONSE} He offers a screw handling solution here:
http://tinyurl.com/34nrdd5
I'd like to offer another solution -- use #4-40 machine screws with hex
socket (Allen wrench) drive heads. The hex socket drive head allows one to
manuever the small screws in a manner vastly superior to a straight slot or
phillips drive head screw.
See here for a source of such screws:
http://www.microfasteners.com/catalog/products/SSC.cfm
Here is just one source of tools for handling these screws:
http://www.bondhus.com/
Conventional Allen wrenches work fine for most handling of these screws, but
these Prohold tools will give even more control if needed:
http://www.bondhus.com/features/prohold/body-0.htm
'OC' Says: "The best investment we can make is the effort to gather and
understand knowledge."
PS: An aerospace vehicle with hex socket or Torx / six lobe / star drive
fasteners is much easier to work on than a vehicle with straight slot or
Phillips drive fasteners. See here for some handy tool kits to work with the
hex socket or Torx / six lobe / star drive fasteners:
http://www.chapmanmfg.com/
======================================================
DO NOT ARCHIVE
Message 3
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| Subject: | Re: Vans RPM Transducer IE VTACHGEN 12 |
The answer may show up here:
http://www.vansairforce.com/community/showthread.php?p=471022#post471022
--------
John Dalman
Keller, TX
RV-8 N247TD
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=313974#313974
Message 4
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| Subject: | Pitot pressure switch |
Check www.aircraftextras.com. They have the switch you need.
John Ciolino
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
tomcostanza
Sent: Monday, September 27, 2010 7:37 PM
Subject: AeroElectric-List: Pitot pressure switch
<Tom@CostanzaAndAssociates.com>
Does anyone know a source for a pressure switch I can put in the
pitot/static system. I'd like to disable the flaps-down function if the
airspeed is above some reasonable value. I can find electronic sensors, but
I'd like to eliminate any electronics for simplicity.
Thanks,
-Tom
--------
Clear Skies,
Tom Costanza
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=313929#313929
Message 5
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| Subject: | Re: db connector hold-down screws |
On 09/27/2010 06:21 PM, James Kilford wrote:
> --> AeroElectric-List message posted by: James Kilford<james@etravel.org>
>
> J, Bob posted some alternatives here:
>
> http://www.aeroelectric.com/Pictures/Connectors/D-Subminature/DIY_Jackscrews.jpg
>
> Hopefully that's what you were after.
>
> James
Thanks to all!
do not archive
>
> On 27 September 2010 18:56, j. davis<jd@lawsonimaging.ca> wrote:
>> --> AeroElectric-List message posted by: "j. davis"<jd@lawsonimaging.ca>
>>
>> Greetings...
>>
>> I remember seeing an article on how to fabricate hold-down screws for db
>> connectors
>> installed with no shells, but now can't locate it. I know it's not exactly
>> rocket science, but would like to re-read the article. I'm pretty sure it
>> was aeroelectric list related...
>>
>>
>> Thanks!
>>
--
Regards, J.
Sonex #325 C-FJNJ, Jabiru 3300a, Prince P-Tip, Aerocarb
restoring the Johnston Special
http://cleco.ca
+-------------------------------------------------------------+
| J. Davis, M.Sc. | (computer science) |
| *NIX consulting, SysAdmin | email: jd at lawsonimaging.ca |
+-------------------------------------------------------------+
Yesterday I parked my car in a tow-away zone...when I came
back the entire area was missing...
--- Steven Wright
Message 6
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| Subject: | Re: Vans RPM Transducer IE VTACHGEN 12 |
I post this occasionally when this topic pops up. This is a divide-by-two rpm converter
for anyone interested.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=298338#298338
Attachments:
http://forums.matronics.com//files/tach_adapter_181.pdf
--------
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones@charter.net
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=313983#313983
Message 7
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| Subject: | Re: Pitot pressure switch |
I suggest that an override switch be wired in parallel with the pressure switch,
in case the pressure switch fails open.
An alternative to disabling the flaps would be an alarm that would sound if the
flaps were lowered while above a certain speed. The pilot would hear the alarm
as soon as the flaps started going down and she would let go of the switch
before the flaps lowered enough to cause damage. (unless she is blonde) :D
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=313985#313985
Message 8
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| Subject: | Re: Pitot pressure switch |
I agree. In my opinion, you should always have direct pilot control coupled
with an independent warning system. Automatic systems are like
bureaucracies: They can be expensive, frustrating to get working and prone
to failure when you need them the most!
Vern
--------------------------------------------------
From: "user9253" <fran4sew@banyanol.com>
Sent: Tuesday, September 28, 2010 5:55 AM
Subject: AeroElectric-List: Re: Pitot pressure switch
> <fran4sew@banyanol.com>
>
> I suggest that an override switch be wired in parallel with the pressure
> switch, in case the pressure switch fails open.
> An alternative to disabling the flaps would be an alarm that would sound
> if the flaps were lowered while above a certain speed. The pilot would
> hear the alarm as soon as the flaps started going down and she would let
> go of the switch before the flaps lowered enough to cause damage. (unless
> she is blonde) :D
> Joe
>
> --------
> Joe Gores
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=313985#313985
>
>
>
> Checked by AVG - www.avg.com
> 17:56:00
>
Message 9
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| Subject: | Re: Pitot pressure switch |
Kevin Horton made a spreadsheet that converts airspeed to pressure. This might
help deciding which pressure switch to buy.
www.tcwtech.com/airspeed%20conversion.xls
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=313987#313987
Message 10
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| Subject: | Re: Pitot pressure switch |
I'd suggest the switch from TCW also - but be careful how you wire
it. Think about the scenarios when you would want it to work and when
not, and then figure out the wiring. An over-ride switch also sounds
sensible.
Peter
On 28/09/2010 00:37, tomcostanza wrote:
> --> AeroElectric-List message posted by: "tomcostanza"<Tom@CostanzaAndAssociates.com>
>
> Does anyone know a source for a pressure switch I can put in the pitot/static
system. I'd like to disable the flaps-down function if the airspeed is above
some reasonable value. I can find electronic sensors, but I'd like to eliminate
any electronics for simplicity.
>
> Thanks,
> -Tom
>
> --------
> Clear Skies,
> Tom Costanza
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=313929#313929
>
>
Message 11
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| Subject: | Re: Pitot pressure switch |
At 07:55 AM 9/28/2010, you wrote:
>
>I suggest that an override switch be wired in parallel with the
>pressure switch, in case the pressure switch fails open.
> An alternative to disabling the flaps would be an alarm that
> would sound if the flaps were lowered while above a certain
> speed. The pilot would hear the alarm as soon as the flaps started
> going down and she would let go of the switch before the flaps
> lowered enough to cause damage. (unless she is blonde) :D
I'll second that suggestion. Keep in mind too
that any time you add complexity to any system,
the parts counts go up and failure modes expand,
probability for failure goes up.
If it's your CD player or cabin air conditioning
system, perhaps not a big concern . . . but hooking
motors to flight control surfaces is IS a BIG
concern.
One is well advised to consider return on
investment for adding complexity. Does it really
ADD to safety? Does it add a bunch of convenience
that helps you be a better pilot while adding little
or no risk? Consider the potential risks for handing
off legacy pilot duties to modern conveniences.
Finally, when such systems are added, make sure that
NO failure will produce a hazardous, un-commanded motion
of the surface and NO failure can produce a hazardous
failure-to-move the surface as needed.
My all time favorite flap system was actuated by
a handle that was pulled up off the floor. Nothing
happened until I was ready for it to happen . . .
and risk of the flaps not being available as
needed was exceedingly low.
Bob . . .
Message 12
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| Subject: | Please comment on my Wiring diagram J3300 and Exp Bus |
Any comment or suggestions appreciated, this is draft 3
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=314039#314039
Attachments:
http://forums.matronics.com//files/j3300_wiring_a_319.jpg
Message 13
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| Subject: | Comments J3300 exp bus wiring(smaller image) |
Please comment
smaller image
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=314042#314042
Attachments:
http://forums.matronics.com//files/j3300_wiring_a1_985.jpg
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