Re: LEDs

[Morgans]

"Bigdaddie" > wrote in message
ink.net...
> What parts would you need to make an LED position light system? I think
new
> traffic signals are LEDs and they are pretty bright.
>
Tthere is a position light for the tail position made of leds, but it is
big. The problem is that leds are directional, and it takes alot to cover
the area.
--
Jim in NC--

[Robert Little]

You are right about that, but the new lights on the tractor-trailer rigs
sure seem bright enough and no maintenance. RTL
"Morgans" > wrote in message
...
>
> "Bigdaddie" > wrote in message
> ink.net...
> > What parts would you need to make an LED position light system? I think
> new
> > traffic signals are LEDs and they are pretty bright.
> >
> Tthere is a position light for the tail position made of leds, but it
is
> big. The problem is that leds are directional, and it takes alot to cover
> the area.
> --
> Jim in NC--
>
>

[Morgans]

"Robert Little" > wrote in message
...
> You are right about that, but the new lights on the tractor-trailer rigs
> sure seem bright enough and no maintenance. RTL

They only need to be at their brightest for a very narrow arc, perhaps 90
degrees or less
--
Jim in NC--

[RobertR237]

In article >, "Robert Little"
> writes:

>
>You are right about that, but the new lights on the tractor-trailer rigs
>sure seem bright enough and no maintenance. RTL
>

It's not the brightness issue so much as the spread. Look at the regulations
on the required viewing angles and maybe you will understand. The LED's are
unidirectional and could cause a problem meeting the regulations. If you will
note, those truck lights need only be seen from behind and traffic signals
benefit from not having too wide a viewing angle.


Bob Reed
www.kisbuild.r-a-reed-assoc.com (KIS Builders Site)
KIS Cruiser in progress...Slow but steady progress....

"Ladies and Gentlemen, take my advice,
pull down your pants and Slide on the Ice!"
(M.A.S.H. Sidney Freedman)

[Jay]

Their degree of directionality depends on the lens that is molded into
the LED. You can select all different spreads, some lens are even
aspherical. Of course the higest INTENSITY ones put all their power
in one direction. LEDs would seem to be nearly ideal for aircraft
application because they're vibration proof, extremely long life, soft
failure, energy efficient (light/watt), simple to drive.

(RobertR237) wrote in message >...
> In article >, "Robert Little"
> > writes:
>
> >
> >You are right about that, but the new lights on the tractor-trailer rigs
> >sure seem bright enough and no maintenance. RTL
> >
>
> It's not the brightness issue so much as the spread. Look at the regulations
> on the required viewing angles and maybe you will understand. The LED's are
> unidirectional and could cause a problem meeting the regulations. If you will
> note, those truck lights need only be seen from behind and traffic signals
> benefit from not having too wide a viewing angle.
>
>
> Bob Reed
> www.kisbuild.r-a-reed-assoc.com (KIS Builders Site)
> KIS Cruiser in progress...Slow but steady progress....
>
> "Ladies and Gentlemen, take my advice,
> pull down your pants and Slide on the Ice!"
> (M.A.S.H. Sidney Freedman)

[Bruce A. Frank]

Just lay out the array so that each row points at a slightly different
angle....or two clusters, one pointing forward and one cluster pointing
straight off the end of the wing...with a slight tilt away from center
as you move to the outer edge of the cluster. Not that hard to
accommodate the regs.

RobertR237 wrote:
>
> In article >, "Robert Little"
> > writes:
>
> >
> >You are right about that, but the new lights on the tractor-trailer rigs
> >sure seem bright enough and no maintenance. RTL
> >
>
> It's not the brightness issue so much as the spread. Look at the regulations
> on the required viewing angles and maybe you will understand. The LED's are
> unidirectional and could cause a problem meeting the regulations. If you will
> note, those truck lights need only be seen from behind and traffic signals
> benefit from not having too wide a viewing angle.
>
> Bob Reed
> www.kisbuild.r-a-reed-assoc.com (KIS Builders Site)
> KIS Cruiser in progress...Slow but steady progress....
>
> "Ladies and Gentlemen, take my advice,
> pull down your pants and Slide on the Ice!"
> (M.A.S.H. Sidney Freedman)

--
Bruce A. Frank, Editor "Ford 3.8/4.2L Engine and V-6 STOL
Homebuilt Aircraft Newsletter"
| Publishing interesting material|
| on all aspects of alternative |
| engines and homebuilt aircraft.|
*------------------------------**----*
\(-o-)/ AIRCRAFT PROJECTS CO.
\___/ Manufacturing parts & pieces
/ \ for homebuilt aircraft,
0 0 TIG welding

While trying to find the time to finish mine.

[Jim]

Take a look at these. You could do it wiht your Ohm's law thingie.
http://www.killacycle.com/Lights.htm

"Bigdaddie" > wrote in message
ink.net...
> What parts would you need to make an LED position light system? I think
new
> traffic signals are LEDs and they are pretty bright.
>
>