REFLECTOR: Landing Light

[Chuck Jensen]

Jim,
 
I believe I've read the same thing about LED car headlights, though
there was no mention of the size of the unit.  If I recall correctly, I
believe they come as a no-cost frill on a entry level $80,000 car :-).
Anyhow, yes, they are in the works.  It'll be interesting to see how
size and cost work out.

Chuck Jensen 

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Jim Agnew
Sent: Wednesday, June 06, 2007 4:10 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Landing Light


You can expect LED landing lights in the next 6-12 months acording to a
good friend in the know.  Car headlights also!
 
Jim
 
James F. Agnew
Jim_Agnew_2 at Yahoo.Com
Tampa, FL
Velocity 173 Elite Aircraft Completed & Flying 


----- Original Message ----
From: Douglas Holub <doug.holub at tx.rr.com>
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Sent: Wednesday, June 6, 2007 3:37:46 PM
Subject: Re: REFLECTOR: Landing Light


Who cares if a person can save 10 amps from his lighting system? Will it
make the plane go any faster or be any safer? Yes. If a person could
keep his total power budget under 10 amps or so, he could use B & C's
vaccuum pad 28 volt, 20 amp alternator and remove the belt driven
alternator at the back of the engine. It helps the c.g. to move the
alternator to the vaccuum pad, there is no belt to break, and total
weight goes down by about 5 lbs. That's what I'm doing. I've got an
electrical system and minimal IFR avionics that use about 9 amps maximum
at 28 volts.
 
Doug Holub

	----- Original Message ----- 
	From: Douglas Holub <mailto:doug.holub at tx.rr.com>  
	To: Velocity Aircraft Owners and Builders list
<mailto:reflector at tvbf.org>  
	Sent: Wednesday, June 06, 2007 2:18 PM
	Subject: Re: REFLECTOR: Landing Light

	In the words of Bob Dylan, "The times, they are a changin'."
I've been designing LED traffic signals for the past few years, and LEDs
are available now that can do landing lights. I've been trying to avoid
designing my own, so I keep waiting for someone else to do it. A 250
watt landing light (20 amps at 12 volts) can be replaced by a 40 watts
(3 amps) of LEDs. I see these guys have one:
	 
	http://www.lunaraccents.com/   I don't know anything about it,
but it looks like it's for the airlines.
	 
	Speaking of low power, I just bought a pair of position lights
and strobes from Kunzleman Electronics. One sleek, aerodynamic package
on each winglet includes the two LED position lights and the strobe. The
strobe power supply accepts 12 to 100 volts, but the LED position lights
are 14 volts only. Since I have a 28 volt system, I asked Dick Kunzleman
if I could connect the two pairs of position lights in series. He said
no problem. So I hook the red lead on the left wing to 28 volts, hook
the black lead on the right wing to ground, and tie the remaining two
leads together. Total 28 volt power budget for all position lights and
strobes: 1.5 amps. I think that's pretty amazing.
	 
	Doug Holub

		----- Original Message ----- 
		From: Chuck Jensen <mailto:cjensen at dts9000.com>  
		To: Velocity Aircraft Owners and Builders list
<mailto:reflector at tvbf.org>  
		Sent: Wednesday, June 06, 2007 1:34 PM
		Subject: Re: REFLECTOR: Landing Light

		Kevin,
		 
		Given the physics involved and despite the rapid
improvements in output from LEDs, I would guess we are still
"light-years" from seeing an effective LED landing light, though I don't
know what kind of lumens a GE4509 put out.  LEDs are great for being
visible at night, but to light up the night, that's a significantly
greaters challenge. OBTW, if you find one....I'll take one!

		Chuck Jensen 

		-----Original Message-----
		From: reflector-bounces at tvbf.org
[mailto:reflector-bounces at tvbf.org] On Behalf Of Velocity_AZ
		Sent: Wednesday, June 06, 2007 1:52 PM
		To: reflector at tvbf.org
		Subject: REFLECTOR: Landing Light
		
		
		Has anyone found a suitable LED replacement for the
GE4509 landing light?
		 
		Kevin

		

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