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Strobe lights temperature

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phil.merlin(at)skynet.be
Guest

Posted: Sun Jul 01, 2007 1:42 am Post subject: Strobe lights temperature

Hello,

  

 I have tested  my Whelen strobe lights on the bench before installing them, and one of them  (the tail one) is overheating (95°C !! after a couple of minutes), although  working fine. But it smells like a hot electric device. I cannot get  from Whelen whether it is normal or not...

  

 I'd like to have the  opinion of other users to compare with...

  

 Thanks in  advance,

  

  

 Philippe

 Brussels -  Belgium



  [quote][b]

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nuckollsr(at)cox.net
Guest

Posted: Wed Jul 04, 2007 7:30 am Post subject: Strobe lights temperature

At 11:39 AM 7/1/2007 +0200, you wrote:



 	  Quote: 	
		  Hello,



I have tested my Whelen strobe lights on the bench before installing them, 

and one of them (the tail one) is overheating (95°C !! after a couple of 

minutes), although working fine. But it smells like a hot electric device. 

I cannot get from Whelen whether it is normal or not...



I'd like to have the opinion of other users to compare with...



Thanks in advance,

Philippe

Brussels - Belgium


	


   This is pretty toasty but perhaps not out of line for

   a devices that is not mounted to an airframe for heat

   sinking and cooled by slipstream.



   I take it that you've got all fixtures running and there

   is a marked difference in temperatures between the tail

   fixture and the tip fixtures? Is there a nav-light in

   the fixture. Is it on too?



   The last time I looked inside one of these there were

   two bulbs (nav and strobe) and a pulse transformer to

   trigger the tube. Energies dissipated in the fixture

   were dominated by the nav bulb and followed by the strobe

   tube. The transformer should run stone cold. If you're

   smelling something, it has to be the insulation in bulb

   sockets, potting compounds or perhaps the insulation of

   the pulse transformer. I'm having trouble getting my head

   wrapped around the idea that one fixture should be markedly

   different than the other two and why it might be different.



   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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phil.merlin(at)skynet.be
Guest

Posted: Wed Jul 04, 2007 8:46 am Post subject: Strobe lights temperature

Hello Bob,



Thanks for the reply. This t° is reached with both bulbs strobe+position on,

but with the strobe only, it isn't much cooler. I have compared with the

wingtip strobes, and those remain cool enough to take them in hand. I'm

surprised by the difference...



Philippe



-----Message d'origine-----

De : owner-aeroelectric-list-server(at)matronics.com

[mailto:owner-aeroelectric-list-server(at)matronics.com] De la part de Robert

L. Nuckolls, III

Envoyé : mercredi 4 juillet 2007 18:28

À : aeroelectric-list(at)matronics.com

Objet : Re: Strobe lights temperature




--> <nuckollsr(at)cox.net>



At 11:39 AM 7/1/2007 +0200, you wrote:



 	  Quote: 	
		  Hello,



I have tested my Whelen strobe lights on the bench before installing 

them, and one of them (the tail one) is overheating (95°C !! after a 

couple of minutes), although working fine. But it smells like a hot

electric device.
	


 	  Quote: 	
		  I cannot get from Whelen whether it is normal or not...



I'd like to have the opinion of other users to compare with...



Thanks in advance,

Philippe

Brussels - Belgium


	


   This is pretty toasty but perhaps not out of line for

   a devices that is not mounted to an airframe for heat

   sinking and cooled by slipstream.



   I take it that you've got all fixtures running and there

   is a marked difference in temperatures between the tail

   fixture and the tip fixtures? Is there a nav-light in

   the fixture. Is it on too?



   The last time I looked inside one of these there were

   two bulbs (nav and strobe) and a pulse transformer to

   trigger the tube. Energies dissipated in the fixture

   were dominated by the nav bulb and followed by the strobe

   tube. The transformer should run stone cold. If you're

   smelling something, it has to be the insulation in bulb

   sockets, potting compounds or perhaps the insulation of

   the pulse transformer. I'm having trouble getting my head

   wrapped around the idea that one fixture should be markedly

   different than the other two and why it might be different.



   Bob . . .



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

        ( "Physics is like sex: sure, it may   )

        ( give some practical results, but     )

        ( that's not why we do it."            )

        (                                      )

        (                 Richard P. Feynman   )

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

- 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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wgill10(at)comcast.net
Guest

Posted: Wed Jul 04, 2007 9:23 am Post subject: Strobe lights temperature

I believe the energy supplied for the tail strobe is twice that supplied

to EACH wingtip strobe IF the wingtip strobes flash simultaneously...a

wiring option for the installer.



Bill

 



--

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seipel(at)seznam.cz
Guest

Posted: Wed Jul 04, 2007 10:36 am Post subject: Strobe lights temperature

I have the same problem, and asked the same question on the RV List and 

several others reported the same situation.  In my case, the tail strobe 

flashes twice as many times as the wingtip strobes, which is what I 

believe is causing the heating.  In my case, it got so hot that it 

clouded the lens.  I spoke to Whelen about it, and all they could tell 

me was that it needs to be installed in the plane and with some length 

of wiring between the strobe and power supply.  According to the guy I 

spoke to, hooking the strobes direct to the power supply with a short 

length of wire is bad.



I'm still concerned that it may scorch the fiberglass rudder tip, but I 

guess I won't know until I install it.



PJ Seipel

RV-10 #40032



Robert L. Nuckolls wrote:

 	  Quote: 	
		   

 <nuckollsr(at)cox.net>



 At 11:39 AM 7/1/2007 +0200, you wrote:



> Hello,

>

> I have tested my Whelen strobe lights on the bench before installing 

> them, and one of them (the tail one) is overheating (95°C !! after a 

> couple of minutes), although working fine. But it smells like a hot 

> electric device. I cannot get from Whelen whether it is normal or not...

>

> I'd like to have the opinion of other users to compare with...

>

> Thanks in advance,

> Philippe

> Brussels - Belgium



   This is pretty toasty but perhaps not out of line for

   a devices that is not mounted to an airframe for heat

   sinking and cooled by slipstream.



   I take it that you've got all fixtures running and there

   is a marked difference in temperatures between the tail

   fixture and the tip fixtures? Is there a nav-light in

   the fixture. Is it on too?



   The last time I looked inside one of these there were

   two bulbs (nav and strobe) and a pulse transformer to

   trigger the tube. Energies dissipated in the fixture

   were dominated by the nav bulb and followed by the strobe

   tube. The transformer should run stone cold. If you're

   smelling something, it has to be the insulation in bulb

   sockets, potting compounds or perhaps the insulation of

   the pulse transformer. I'm having trouble getting my head

   wrapped around the idea that one fixture should be markedly

   different than the other two and why it might be different.



   Bob . . .



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

        ( "Physics is like sex: sure, it may   )

        ( give some practical results, but     )

        ( that's not why we do it."            )

        (                                      )

        (                 Richard P. Feynman   )

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

- 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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phil.merlin(at)skynet.be
Guest

Posted: Wed Jul 04, 2007 1:00 pm Post subject: Strobe lights temperature

Hi Bill,



Thanks very much for pointing my mistake  I don't understand how I have

skipped that note on the product sheet... And Whelen themselves didn't tell

me anything when I have complained... I'll remove the jumper that makes the

alternate flashing, one sole strobe doesn't seem to be designed to withstand

energy for two...



Phil 



-----Message d'origine-----

De : owner-aeroelectric-list-server(at)matronics.com

[mailto:owner-aeroelectric-list-server(at)matronics.com] De la part de William

Gill

Envoyé : mercredi 4 juillet 2007 19:20

À : aeroelectric-list(at)matronics.com

Objet : RE: Strobe lights temperature




--> <wgill10(at)comcast.net>



I believe the energy supplied for the tail strobe is twice that supplied to

EACH wingtip strobe IF the wingtip strobes flash simultaneously...a wiring

option for the installer.



Bill

 



--

- 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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