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4 light wig-wag

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micreb

Joined: 13 Jan 2011
Posts: 7
Location: O'Brien FL

Posted: Wed Nov 02, 2016 8:30 am Post subject: 4 light wig-wag

I replaced the wing tips on my Murphy Rebel and now have a landing and taxi light on each wing...  Who needs runway lights, eh?

Anyone have any ideas on wigwag for all 4 lights that would enhance the already attention getting 2 light system?

All 4 are halogen.  Not really interested in LEDs yet till the prices come down....

Paul

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_________________
I'd rather be flying than building but there's an end to the means here (I hope).

nuckolls.bob(at)aeroelect
Guest

Posted: Wed Nov 02, 2016 10:03 am Post subject: 4 light wig-wag

At 11:30 AM 11/2/2016, you wrote:

  	  Quote: 	
		  --> AeroElectric-List message posted by: "micreb" <n616pm(at)gmail.com>



 I replaced the wing tips on my Murphy Rebel and now have a landing and taxi light on each wing...  Who needs runway lights, eh?

 Anyone have any ideas on wigwag for all 4 lights that would enhance the already attention getting 2 light system?

 All 4 are halogen.  Not really interested in LEDs yet till the prices come down.... 	


   probably no big advantage in 'doubling' the

   light output.



   The effectiveness of a wig-wag system has more

   to do with SPACING between the lamps than with

   intensity. The eye is a very logarithmic sensor

   device that delivers little new information

   to the brain due to 2x increase in intensity.



   On the other hand, visual acuity determines the

   angular displacement that must be exceeded before

   a pair of flashing lights is perceived as more

   than a single light source.



   Worked this issue MANY times in preparing accident

   analysis data for litigation of railroad grade

   crossing accidents. Lawyers were fond of latching

   onto visual differences between newest 12"

   roundels versus legacy 8" lenses.



   Perceived intensity of the lights is driven

   mostly by behaviors of the lens for shaping

   the beam than by the size of the lamp or

   its associated lens.



   The attention getting quality of a grade crossing

   signal (originally a single lamp on the end

   of a swinging arm . . . a wig wag) is the

   distance between the lamps.



   



   Those interested in exploring this topic from

   the railroad perspective may download the

   grade crossing 'bible' at   http://tinyurl.com/j3nveyx



   For our purposes, effectiveness of the wig-wag

   system is improved by mounting the lamps as far

   apart as practical on the wings. A larger 'stroke'

   distance translates into a greater range of

   perceptions.



   Our development wig-wag adds another feature

   that goes to range of perception. At great

   distance, the two lights visually merge and

   are no particularly attention getting. However,

   if you 'triple flash' each lamp during its

   respective on-cycle, then you exploit perception

   of flashing which occurs at greater range

   and perception of motion.



  http://tinyurl.com/bos5p5r



   As you approach the observer, perception

   of motion adds to perception of flashing.



   The short answer is, doubling up on the lamps

   is of little value. But mounting them further

   apart and/or flashing is a good thing

   to do.



 

 

   Bob . . .    [quote][b] [quote][b]

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nuckolls.bob(at)aeroelect
Guest

Posted: Wed Nov 02, 2016 10:20 am Post subject: 4 light wig-wag

At 11:30 AM 11/2/2016, you wrote:

  	  Quote: 	
		  --> AeroElectric-List message posted by: "micreb" <n616pm(at)gmail.com>



 I replaced the wing tips on my Murphy Rebel and now have a landing and taxi light on each wing...  Who needs runway lights, eh?

 Anyone have any ideas on wigwag for all 4 lights that would enhance the already attention getting 2 light system?

 All 4 are halogen.  Not really interested in LEDs yet till the prices come down.... 	


   probably no big advantage in 'doubling' the

   light output.



   The effectiveness of a wig-wag system has more

   to do with SPACING between the lamps than with

   intensity. The eye is a very logarithmic sensor

   device that delivers little new information

   to the brain due to 2x increase in intensity.



   On the other hand, visual acuity determines the

   angular displacement that must be exceeded before

   a pair of flashing lights is perceived as more

   than a single light source.



   Worked this issue MANY times in preparing accident

   analysis data for litigation of railroad grade

   crossing accidents. Lawyers were fond of latching

   onto visual differences between newest 12"

   roundels versus legacy 8" lenses.



   Perceived intensity of the lights is driven

   mostly by behaviors of the lens for shaping

   the beam than by the size of the lamp or

   its associated lens.



   The attention getting quality of a grade crossing

   signal (originally a single lamp on the end

   of a swinging arm . . . a wig wag) is the

   distance between the lamps.



   



   Those interested in exploring this topic from

   the railroad perspective may download the

   grade crossing 'bible' at   http://tinyurl.com/j3nveyx



   For our purposes, effectiveness of the wig-wag

   system is improved by mounting the lamps as far

   apart as practical on the wings. A larger 'stroke'

   distance translates into a greater range of

   perceptions.



   Our development wig-wag adds another feature

   that goes to range of perception. At great

   distance, the two lights visually merge and

   are not particularly attention getting. However,

   if you 'triple flash' each lamp during its

   respective on-cycle, then you exploit perception

   of flashing which occurs at greater range

   and perception of motion.



  http://tinyurl.com/bos5p5r



   As you approach the observer, perception

   of motion adds to perception of flashing.



   The short answer is, doubling up on the lamps

   is of little value. But mounting them further

   apart and/or flashing is a good thing

   to do.



 

 

   Bob . . .     [quote][b] [quote][b]

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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nuckolls.bob(at)aeroelect
Guest

Posted: Wed Nov 02, 2016 10:22 am Post subject: 4 light wig-wag

probably no big advantage in 'doubling' the

   light output.



   The effectiveness of a wig-wag system has more

   to do with SPACING between the lamps than with

   intensity. The eye is a very logarithmic sensor

   device that delivers little new information

   to the brain due to 2x increase in intensity.



   On the other hand, visual acuity determines the

   angular displacement that must be exceeded before

   a pair of flashing lights is perceived as more

   than a single light source.



   Worked this issue MANY times in preparing accident

   analysis data for litigation of railroad grade

   crossing accidents. Lawyers were fond of latching

   onto visual differences between newest 12"

   roundels versus legacy 8" lenses.



   Perceived intensity of the lights is driven

   mostly by behaviors of the lens for shaping

   the beam than by the size of the lamp or

   its associated lens.



   The attention getting quality of a grade crossing

   signal (originally a single lamp on the end

   of a swinging arm . . . a wig wag) is the

   distance between the lamps.



   



   Those interested in exploring this topic from

   the railroad perspective may download the

   grade crossing 'bible' at   http://tinyurl.com/j3nveyx



   For our purposes, effectiveness of the wig-wag

   system is improved by mounting the lamps as far

   apart as practical on the wings. A larger 'stroke'

   distance translates into a greater range of

   perceptions.



   Our development wig-wag adds another feature

   that goes to range of perception. At great

   distance, the two lights visually merge and

   are not particularly attention getting. However,

   if you 'triple flash' each lamp during its

   respective on-cycle, then you exploit perception

   of flashing which occurs at greater range

   and perception of motion.



  http://tinyurl.com/bos5p5r



   As you approach the observer, perception

   of motion adds to perception of flashing.



   The short answer is, doubling up on the lamps

   is of little value. But mounting them further

   apart and/or flashing is a good thing

   to do.



 

 

   Bob . . .     [quote][b] [quote][b]

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

nuckolls.bob(at)aeroelect
Guest

Posted: Wed Nov 02, 2016 11:46 am Post subject: 4 light wig-wag

 	  Quote: 	
		  For some reason, my replies to the List have been

getting truncated. I can seed the same email to

my personal account with no adverse effects

but files to the List get clipped. 



The last paragraphs of my abbreviated posting

are as follows:



[/b] 	
  Those interested in exploring this topic from

   the railroad perspective may download the

   grade crossing 'bible' at   http://tinyurl.com/j3nveyx



   For our purposes, effectiveness of the wig-wag

   system is improved by mounting the lamps as far

   apart as practical on the wings. A larger 'stroke'

   distance translates into a greater range of

   perceptions.



   Our development wig-wag adds another feature

   that goes to range of perception. At great

   distance, the two lights visually merge and

   are not particularly attention getting. However,

   if you 'triple flash' each lamp during its

   respective on-cycle, then you exploit perception

   of flashing which occurs at greater range

   and perception of motion.



  http://tinyurl.com/bos5p5r



   As you approach the observer, perception

   of motion adds to perception of flashing.



   The short answer is, doubling up on the lamps

   is of little value. But mounting them further

   apart and/or flashing is a good thing

   to do.



 



 



 

 [quote]  Bob . . .[/b]    [quote][b] [quote][b]

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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ornerycuss2001(at)yahoo.c
Guest

Posted: Wed Nov 02, 2016 1:28 pm Post subject: 4 light wig-wag

I saw 4 responses and they all ended the same way.  It looked like a complete response to me.

--------------------------------------------

On Wed, 11/2/16, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com> wrote:



 Subject: Re: 4 light wig-wag

 To: aeroelectric-list(at)matronics.com

 Date: Wednesday, November 2, 2016, 12:44 PM

 

 

 

 For some reason, my replies to the List have been

 getting truncated. I can seed the same email to

 my personal account with no adverse effects

 but files to the List get clipped. 

 

 The last paragraphs of my abbreviated posting

 are as follows:

 

   Those interested in exploring

 this topic

 from

 

   the railroad perspective may download the

 

   grade crossing 'bible' at 

 

 http://tinyurl.com/j3nveyx

 

 

   For our purposes, effectiveness of the wig-wag

 

   system is improved by mounting the lamps as far

 

   apart as practical on the wings. A larger

 'stroke'

 

   distance translates into a greater range of

 

   perceptions.

 

 

   Our development wig-wag adds another feature

 

   that goes to range of perception. At great

 

   distance, the two lights visually merge and

 

   are not particularly attention getting. However,

 

   if you 'triple flash' each lamp during its

 

   respective on-cycle, then you exploit perception

 

   of flashing which occurs at greater range

 

   and perception of motion.

 

 

 

 http://tinyurl.com/bos5p5r

 

 

   As you approach the observer, perception

 

   of motion adds to perception of flashing.

 

 

   The short answer is, doubling up on the lamps

 

   is of little value. But mounting them further

 

   apart and/or flashing is a good thing

 

   to do.

 

 

 

 

 

 

 

 

  

   Bob . . .

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nuckolls.bob(at)aeroelect
Guest

Posted: Wed Nov 02, 2016 5:22 pm Post subject: 4 light wig-wag

At 04:24 PM 11/2/2016, you wrote:

  	  Quote: 	
		  --> AeroElectric-List message posted by: Buckaroo Banzai <ornerycuss2001(at)yahoo.com>



 I saw 4 responses and they all ended the same way.  It looked like a complete response to me. 	


  Oh good . . . thank you. I checked the forum

  through the browser and confirmed your

  observation. Pleased to know it's MY

  problem and not somebody else's!



 

 

   Bob . . .    [quote][b] [quote][b]

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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donjohnston

Joined: 13 Dec 2009
Posts: 231

Posted: Thu Nov 03, 2016 5:19 am Post subject: Re: 4 light wig-wag

[quote="nuckolls.bob(at)aeroelect"]The short answer is, doubling up on the lamps is of little value. But mounting them further apart and/or flashing is a good thing to do.



   Bob . . .    [quote][b]  	  Quote: 	
		  [b] 	




Yep.  When I was looking at landing lights in my 182RG, I was thinking about wig-wagging the landing and taxi light (about 1' apart).  I was told that flashing them when they are that close to each other would look like one light on continuously. 



I found a document which had a table that had the distance from the viewer and how far apart the lights should be.  



Of course I can't find it now.

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Eric M. Jones

Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts

Posted: Fri Nov 04, 2016 9:51 am Post subject: Re: 4 light wig-wag

I supply Wig-Wags for four-light systems, but usually where (for example) two 75W lamps on each wing. The problem is that two lamps in parallel on each wing are half the cold resistance, so a surge suppressor has to be used on each lamp.



But I also supply Wig-Wags for single light Europas and other single front- lighted systems. This is done by powering only one lamp while doubling the frequency. When I first tried this, I doubled it would work because of warm-up and cool-down delays but it seems to work quite well. The FDA has no guidelines for this.



One thing should be mentioned regarding Wig-Wags...They are the very best protection against birdstrikes (a study has determined).



Regarding LEDs...use them now! If you don't want to spend the money with aviation suppliers, use the auto and off-road vendors. There are plenty of lower cost suppliers. and plenty of plug-and-play units.



As for wig-wagging lamp that are very close together, it is hard to do, but some locomotives use one lamp and just swing it to and fro. Seems to work.

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_________________
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net

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