mprather(at)spro.net
Guest
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 Posted: Wed Jul 04, 2007 9:59 pm Post subject: Automatic Headlight Hi/Lo Fallover Circuit |
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I've said it before (and so have others).. Most of the time you don't
really need a landing light at all. I probably make slightly more
consistently smooth landings with a light, but I've don't lots without.
Certainly if you are operating from an airfield that doesn't have runway
lights, you'll need something that's reliable/redundant (if you don't have
an acceptable alternate landing field for the _very rare case when a light
has failed).
Again echoing others, I'd add the other wire to run the other filament.
You _could_ add a second control wire (lighter) to run a relay which
allows you to select which filament is lit - dimmer relay - mounted near
the bulbs..
I like my Cessna setup with 2 bulbs - a taxi light and a landing light
mounted in the wing. I especially like the wing tip mounted lights. The
taxi light and landing lights are aimed such that either works adequately
at either purpose. Taildraggers might not be like this..
Whatever you do, make sure replacing the bulbs is easy..
Regards,
Matt-
| Quote: |
<emjones(at)charter.net>
>
> I would like to see your "back-of-the-envelope" design.
> What do you mean "by adding one simple wire"? Just a jumper from the
> high to low beam at the lamp, or another wire from a switch in the
> cockpit. I'd like to hear your ideas.
> At some point I will install LED headlights, probably after it's
> "plug-n-play".
I meant another wire to the lamp, allowing a switch to turn on one
filament or the other. But I sense there is some old and clever way to do
this job that has been around since 1930.
Attached is my "back-of-the-envelope" design. This is not adequate to
build one, but remember, I suggest not doing it at all.
"Democracy is the theory that the common people know what they want and
deserve to get it good and hard." -- H. L. Mencken
--------
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=122148#122148
Attachments:
http://forums.matronics.com//files/high_beam_to_low_beam_165.pdf
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