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nuckollsr(at)cox.net
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 Posted: Mon Jun 04, 2007 8:15 am Post subject: Grimes P/N 5530 retractable landing light |
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At 03:30 PM 6/1/2007 -0700, you wrote:
| Quote: | Does anybody know if they made these in a 12v version?
> and a Grimes P/N 5530
> >Retractable Landing Light which I would like to install.
> >
|
There are a number of 12 and 24 volt, retractable landing lights
out there in the wild. Of course, they've not been installed in
a production aircraft for many moons. A C-120.5 I used to fly
had one on it as did many other Cessnas of the 40's and 50's I
had the pleasure to ride in and/or touch.
I've always thought that a modern incarnation of this product
was worthy of consideration. The devices mount on the underside
of the wing (less prone to leaking due to rain in both parked
and flying conditions), easier to install, easier to design for
adjustability (pointing) and offers a degree of in-flight
adjustability for optimum illumination in a steep approach but
can be lowered to optimize illumination for taxi.
If you find a 24v device you'd like to use, just put a 14v lamp
in it and run the motor on half voltage. It will still work, just
slower. A group of folks I'm working with these days are really into
small, modern actuators . . . we might come up with a retractable
light assembly designed around a modern, automotive halogen or
even an LED light bulb.
Bob . . .
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nuckollsr(at)cox.net
Guest
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| Posted: Mon Jun 04, 2007 8:32 am Post subject: Grimes P/N 5530 retractable landing light |
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At 06:36 PM 6/1/2007 -0400, you wrote:
| Quote: | In a message dated 6/1/2007 5:33:58 P.M. Central Daylight Time,
blackoaks(at)gmail.com writes:
Does anybody know if they made these in a 12v version?
and a Grimes P/N 5530
>Retractable Landing Light which I would like to install.
>
--
John McMahon
Lancair Super ES, S/N 170, N9637M (Reserved)
Good Evening John,
Supposedly, mine is a twelve volt version. However, I have not yet put
power to it!
|
Bob, Consider acquiring a current limited, adjustable power supply
like this:
http://tinyurl.com/3yrvaq
You can set this puppy up for 14v output and turn the
current limit down to 1A or so and safely probe the pins
of the device to see which ones cause the motor to move and
which way. The lamp will be connected to it's own pins and
this little power supply will simply stall into a perceived
dead short when you find those pins.
One pin will be common to the motor and two other pins
will be extend and retract. I'll bet that the motor stuff
all happens on A, B and C while the lamp pins will be somewhere
else in the constellation.
Alternatively to the power supply, rig a test setup with
a battery, and put some 1-2A light bulb in series with
the leads to the test probes. Shorting the probes will
produce a limited current flow. You can parallel a number
of small lamps to get the 1-2A rating . . . back-up lamps
for cars are hot prospects.
Bob . . .
----------------------------------------
( "Physics is like sex: sure, it may )
( give some practical results, but )
( that's not why we do it." )
( )
( Richard P. Feynman )
----------------------------------------
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Bruce(at)glasair.org
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| Posted: Mon Jun 04, 2007 8:35 am Post subject: Grimes P/N 5530 retractable landing light |
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I'll take 2, 24v, please consider HID lights.
Bruce
www.glasair.org
--
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lists(at)stevet.net
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| Posted: Mon Jun 04, 2007 9:50 am Post subject: Grimes P/N 5530 retractable landing light |
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I'll take two too, 12 v., HID
Best Regards,
Steve
____________________________________________________________________
On Jun 4, 2007, at 9:35 AM, Bruce Gray wrote:
[quote]
<Bruce(at)glasair.org>
I'll take 2, 24v, please consider HID lights.
Bruce
www.glasair.org
--
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lists(at)stevet.net
Guest
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| Posted: Mon Jun 04, 2007 11:13 am Post subject: Grimes P/N 5530 retractable landing light |
|
|
I was snooping around the net for a retractable light system and
found the following statement on the XeVision site:
"We also have oval and rectangular designs for small spaces (wing-
tip) and a retractable landing light system (under design)."
It's on the aviation page of their site, xevision.com.
Best Regards,
Steve T
____________________________________________________________________
On Jun 4, 2007, at 10:15 AM, Robert L. Nuckolls, III wrote:
| Quote: | we might come up with a retractable
light assembly designed around a modern, automotive halogen or
even an LED light bulb.
Bob . . .
|
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BobsV35B(at)aol.com
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| Posted: Tue Jun 05, 2007 5:11 am Post subject: Grimes P/N 5530 retractable landing light |
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In a message dated 6/4/2007 11:34:14 A.M. Central Daylight Time, nuckollsr(at)cox.net writes:
| Quote: | Bob, Consider acquiring a current limited, adjustable power supply
like this:
http://tinyurl.com/3yrvaq
You can set this puppy up for 14v output and turn the
current limit down to 1A or so and safely probe the pins
of the device to see which ones cause the motor to move and
which way. The lamp will be connected to it's own pins and
this little power supply will simply stall into a perceived
dead short when you find those pins.
One pin will be common to the motor and two other pins
will be extend and retract. I'll bet that the motor stuff
all happens on A, B and C while the lamp pins will be somewhere
else in the constellation.
Alternatively to the power supply, rig a test setup with
a battery, and put some 1-2A light bulb in series with
the leads to the test probes. Shorting the probes will
produce a limited current flow. You can parallel a number
of small lamps to get the 1-2A rating . . . back-up lamps
for cars are hot prospects.
Bob . . .
|
Sounds great! I'll give it a try.
Happy Skies,
Old Bob
AKA
Bob Siegfried
Ancient Aviator
Stearman N3977A
Brookeridge Air Park LL22
Downers Grove, IL 60516
630 985-8503
See what's free at AOL.com.
[quote][b]
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longg(at)pjm.com
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| Posted: Tue Jun 05, 2007 11:15 am Post subject: Grimes P/N 5530 retractable landing light |
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Grief, $$$, lots of time, don't fly at night or just bragging rights,
I found an easy solution is to take the XV-36-H1 (or similar)
offered by XeVision and install it in the front intake on the cowling
(everyone has one or two). No fancy doors or mechanisms, just two AN
bolts, power and ground. Nothing could be easier and it is out of the
air stream (retracted). There is no substantial airflow lost. I do most
of my flying at night and this arrangement works very well pointing the
light directly where you need it. Concealed or retractable headlights
are just one more thing to go wrong. Anyone who has owned, cougars,
tornados, thunderbirds or Cadillac's can attest to that issue.
When you get good you don't need a landing light 
--
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mprather(at)spro.net
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| Posted: Tue Jun 05, 2007 12:36 pm Post subject: Grimes P/N 5530 retractable landing light |
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Can't argue against simplicity as an attribute. However, having owned an
airplane with the landing light in the nose, I can attest to their
relatively higher rate of vibration related failure. Wing mounted landing
lights live longer. Vibration may not be a significant issue if the
XeVision lights are more rugged against this kind of abuse as compared to
aircraft sealed beams (surely most lights are more rugged than aircraft
sealed beams).
A couple of other gripes against cowl mounted lights - means there's a
plug or set of wires to be disconnected when removing the cowl. Not a big
deal, but kind of annoying. And a service item. If mounted on the front
cylinder airflow baffle, more effort must be provided so that the baffle
isn't damaged by the vibrating mass of the light and pull from the wires.
The baffles on the airplanes I have been around have definitely suffered
from cracking. More stuff attached to them doesn't help their life.
And, as Bob mentioned, the cowl mounted light will be exposed to more
rain, etc.
Finally, if used as recognition lights, wing mounted locations provide
more visual separation. This improved the effectiveness of wig-wagging.
For recognition lights, I light those mounted in the wingtips best.
As far as needing landing lights, I don't think it's really related to
being good or not.. I am pretty certain I have only average piloting
skills, and I never flew an airplane that had a functioning landing light
until well after I got my private. If you keep the cockpit lighting
turned down it's not too difficult. I found taxiing without any lights to
be the hard part...
Regards,
Matt-
[quote]
Grief, $$$, lots of time, don't fly at night or just bragging rights,
I found an easy solution is to take the XV-36-H1 (or similar)
offered by XeVision and install it in the front intake on the cowling
(everyone has one or two). No fancy doors or mechanisms, just two AN
bolts, power and ground. Nothing could be easier and it is out of the
air stream (retracted). There is no substantial airflow lost. I do most
of my flying at night and this arrangement works very well pointing the
light directly where you need it. Concealed or retractable headlights
are just one more thing to go wrong. Anyone who has owned, cougars,
tornados, thunderbirds or Cadillac's can attest to that issue.
When you get good you don't need a landing light
--
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http://www.matronics.com/Navigator?AeroElectric-List |
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