Harry can you post a link to the contents "Scroll down to read post etc" please?Little h wrote: ↑Tue May 28, 2019 1:16 amAlthough it sounds as a nice little earner - it's not my style David.... however I have found (via Google would u believe) the response I gave (complete with some images - thankfully because the hyper link broke that night) at the beginning of Oct 2018 in page 11 of RN Aircraft Carriers; Queen Elizabeth Class thread,
Scroll down to read the post:-
Re: RN Aircraft Carriers: Queen Elizabeth Class
Post by Little h » Wed Oct 03, 2018 1:38 am
The posts before and after are equally interesting![]()
________________________________________________________
Note; it seems to me that posts relating to specific items of equipment (systems or parts thereof) should find a home in this thread
QEC Carriers
- Pelican
- Posts: 10491
- Joined: Thu Aug 09, 2018 10:10 pm
Re: QEC Carriers
HMS Pelican 1938 - 1958 GGCV L86 U86 F86 What I Have I Hold ~ A wonderful bird is the Pelican its beak can hold more than its belly can.
- Little h
- Posts: 1727
- Joined: Sun Aug 12, 2018 6:53 pm
Re: QEC Carriers
David, as far as I am aware we are unable to link individual post from within a thread, however I include two screenshots to the post in page 11 of the 'RN Aircraft Carriers: Queen Elizabeth Class' thread.Pelican wrote: ↑Tue May 28, 2019 5:54 pmHarry can you post a link to the contents "Scroll down to read post etc" please?Little h wrote: ↑Tue May 28, 2019 1:16 amAlthough it sounds as a nice little earner - it's not my style David.... however I have found (via Google would u believe) the response I gave (complete with some images - thankfully because the hyper link broke that night) at the beginning of Oct 2018 in page 11 of RN Aircraft Carriers; Queen Elizabeth Class thread,
Scroll down to read the post:-
Re: RN Aircraft Carriers: Queen Elizabeth Class
Post by Little h » Wed Oct 03, 2018 1:38 am
The posts before and after are equally interesting![]()
________________________________________________________
Note; it seems to me that posts relating to specific items of equipment (systems or parts thereof) should find a home in this thread
I trust this helps locate the post.
This link will initially bring up the page ... but IIRC it drops out within a short space of time ... so we shall see
![Embarrassed :oops:](./images/smilies/icon_redface.gif)
http://lewin-of-greenwich-naval-history ... =100#p2346
You do not have the required permissions to view the files attached to this post.
Little h
- Pelican
- Posts: 10491
- Joined: Thu Aug 09, 2018 10:10 pm
Re: QEC Carriers
VMT Harry, sorry but the old saying is still true "The convoy moves at the speed of the slowest ship." Oh to be young again or even a bit younger.
HMS Pelican 1938 - 1958 GGCV L86 U86 F86 What I Have I Hold ~ A wonderful bird is the Pelican its beak can hold more than its belly can.
- Little h
- Posts: 1727
- Joined: Sun Aug 12, 2018 6:53 pm
Re: QEC Carriers
LED Floodlights (& associated heatsinks) fitted on QEC carriers
My interest in the installation was piqued when I viewed the following image on NavyLookout on Twitter that showed a significant heatsink behind what transpired to be a cluster of four floodlights.
So I cropped and highlighted (no pun intended) the image to identify what is the uppermost(rear) side of the light cluster.
(the lay of the cable it appears that this is the central cluster of a group of three floodlights on the stbd bow of QE R08)
---------------------------------
After much searching/browsing I eventually happened upon the following article carriend in ENGINEERLIVE:-
LED floodlights meet stringent requirements of Royal Navy aircraft carriers
Posted By Paul Boughton
Lighting solutions specialist Glamox has supplied hundreds of LED Wide beam floodlights for use on the Royal Navy’s two new aircraft carriers, the HMS Queen Elizabeth and HMS Prince of Wales – the largest surface warships ever built for the Royal Navy.
------------------------------
For these prestigious projects, Glamox supplied a total of 294 FL60N Wide beam floodlights. These floodlights are installed in internal hangar locations, as well as externally in evacuation areas and for illuminating the surface of the sea. The FL60N floodlights met the stringent requirements of the Royal Navy and were delivered to its contractor, BAE Systems in Glasgow.
The FL60N was shock tested to stringent naval/MOD requirements (BR 8740), which specify that the lights are still operational after being subjected to a particular shock grade. Glamox also designed a special mounting bracket that enhanced the support for the floodlight and preventing it from rotating under shock.
The FL60N is a member of the FL60 family of LED floodlights from Glamox. The FL60N is specially designed for Navy applications and environments. Other variants from this family include the FX60, designed and certified for use in Ex Zone 1 hazardous environments.
The FL60 floodlights offer a virtually maintenance-free solution for all high intensity lighting requirements. The FL60 is available as a four-module version and is an excellent choice of luminaire for demanding applications where illumination over longer distances is required. The FL60 operates in ambient temperatures ranging from -45ºC to +55ºC.
The FL60 LED light source and integrated driver technology are designed to offer excellent heat management, providing a long operating life of at least 100,00 hours at 45ºC with 70% light output (L70). The virtually maintenance-free luminaire therefore provides savings in terms of product lifecycle costs. There are also substantial savings in terms of energy consumption. An FL60 floodlight consumes around 75% less energy compared to high-pressure sodium lamps.
The FL60 is housed in a seawater-resistant, anodised aluminium housing and is mounted using a 316 stainless steel frame and adjustable mounting bracket. The combination of these materials offers a robust, reliable four-module floodlight that weighs less than 20kg. The FL60 also has special approved connection terminals and a die cast aluminium alloy junction box to suit Navy/MOD applications.
-----------------------------------
The following attachments are included to identify the location of said 3 x clusters of 4 LED floodlights:-
FFBNW (fitted for but not with)
Fitted but not switched on
Fitted and switched on
My interest in the installation was piqued when I viewed the following image on NavyLookout on Twitter that showed a significant heatsink behind what transpired to be a cluster of four floodlights.
So I cropped and highlighted (no pun intended) the image to identify what is the uppermost(rear) side of the light cluster.
(the lay of the cable it appears that this is the central cluster of a group of three floodlights on the stbd bow of QE R08)
---------------------------------
After much searching/browsing I eventually happened upon the following article carriend in ENGINEERLIVE:-
LED floodlights meet stringent requirements of Royal Navy aircraft carriers
Posted By Paul Boughton
Lighting solutions specialist Glamox has supplied hundreds of LED Wide beam floodlights for use on the Royal Navy’s two new aircraft carriers, the HMS Queen Elizabeth and HMS Prince of Wales – the largest surface warships ever built for the Royal Navy.
------------------------------
For these prestigious projects, Glamox supplied a total of 294 FL60N Wide beam floodlights. These floodlights are installed in internal hangar locations, as well as externally in evacuation areas and for illuminating the surface of the sea. The FL60N floodlights met the stringent requirements of the Royal Navy and were delivered to its contractor, BAE Systems in Glasgow.
The FL60N was shock tested to stringent naval/MOD requirements (BR 8740), which specify that the lights are still operational after being subjected to a particular shock grade. Glamox also designed a special mounting bracket that enhanced the support for the floodlight and preventing it from rotating under shock.
The FL60N is a member of the FL60 family of LED floodlights from Glamox. The FL60N is specially designed for Navy applications and environments. Other variants from this family include the FX60, designed and certified for use in Ex Zone 1 hazardous environments.
The FL60 floodlights offer a virtually maintenance-free solution for all high intensity lighting requirements. The FL60 is available as a four-module version and is an excellent choice of luminaire for demanding applications where illumination over longer distances is required. The FL60 operates in ambient temperatures ranging from -45ºC to +55ºC.
The FL60 LED light source and integrated driver technology are designed to offer excellent heat management, providing a long operating life of at least 100,00 hours at 45ºC with 70% light output (L70). The virtually maintenance-free luminaire therefore provides savings in terms of product lifecycle costs. There are also substantial savings in terms of energy consumption. An FL60 floodlight consumes around 75% less energy compared to high-pressure sodium lamps.
The FL60 is housed in a seawater-resistant, anodised aluminium housing and is mounted using a 316 stainless steel frame and adjustable mounting bracket. The combination of these materials offers a robust, reliable four-module floodlight that weighs less than 20kg. The FL60 also has special approved connection terminals and a die cast aluminium alloy junction box to suit Navy/MOD applications.
-----------------------------------
The following attachments are included to identify the location of said 3 x clusters of 4 LED floodlights:-
FFBNW (fitted for but not with)
Fitted but not switched on
Fitted and switched on
You do not have the required permissions to view the files attached to this post.
Last edited by Little h on Sun Jun 30, 2019 2:12 am, edited 1 time in total.
Little h
- Little h
- Posts: 1727
- Joined: Sun Aug 12, 2018 6:53 pm
Re: QEC Carriers
LED Floodlights (& associated heatsinks) fitted on QEC carriers
My interest in the installation was piqued when I viewed the following image on NavyLookout on Twitter that showed a significant heatsink behind what transpired to be a cluster of four floodlights.
The following excerpts come from an a commercial article and only a few have been selected.
Why You Need an LED Heat Sink: Increasing light output & extending your LEDs lifetime
5 months ago by Taylor Scully 8,815 Views
Do LEDs produce heat?
A frequently listed advantage of LEDs is that they do not produce heat. In a way, this is true, LEDs are cool to the touch because they usually do not produce heat in the form of infrared (IR) radiation. This obviously doesn’t go for IR specific LEDs.
IR radiation is what actually heats incandescent bulbs and other light sources, making them hot to the touch. Without IR radiation, LEDs are able to be placed in spots where the heat from other sources would cause a problem (grow lights, reef tank lights, illuminating food, etc.).
Although LEDs are cool to the touch, within the devices themselves, there is plenty of unwanted heat. This heat comes from the inefficiency of the semiconductors that generate the light. The radiant efficiency (total optical output power divided by total electrical input power) of LEDs is typically between 5 and 40%, meaning that 60-95% of the input power is lost as heat. So what do you do with all this excess internal heat?!
Why should LED junction temperature be managed?
With high-power LEDs, it is crucial that you remove heat through efficient thermal management. Without good heat sinking, the junction (internal) temperature of the LED rises, causing the LED characteristics to change for the bad.
As the junction temperature of an LED increases, both the forward voltage and the lumen output decreases (see Picture 1). Not only is this decreasing the brightness and efficiency of your LED but this junction
temperature affects the overall lifetime of the LED as well. LEDs don’t usually fail catastrophically (although some may, especially if you over heat them); instead, the lumen output of the LED will decrease over time. Higher junction temperatures lead to faster LED deterioration. This is why it is crucial to keep your LED junction temperature low. Also take note that if you are over driving your LED (putting more current to it than what it is rated) this will drive temperatures up so high that permanent damage can occur.
The most important part of LED cooling is the thermal path from the LED junction to the outside of the light fixture. Heat needs to be conducted away from the LED in an efficient manner, and then removed from the area by some sort of cooling or dissipation.
This is where LED heat sinks come in.
Heat sinks are an important part of LED lighting because they provide the path for heat to travel from the LED light source to outside elements. Heat sinks are able to dissipate power in three ways: conduction (heat transfer from a solid to a solid), convection (heat transfer from a solid to a moving fluid, air in most cases), or radiation (heat transfer from two bodies at different temperatures through thermal radiation).
Although admittedly not Marine/Naval orientated; Read full article here at LEDsupply
--------------------------------
Providing a 'rather dim' effort for the Rolls Royce & Bentley enthusiasts
and .... what to do if the slot meter hasn't been kept Fed .... get the Fed's to provide illumination all the way!!!
Well .... you have to keep these subjects 'light' hearted
![Wink ;)](./images/smilies/icon_e_wink.gif)
My interest in the installation was piqued when I viewed the following image on NavyLookout on Twitter that showed a significant heatsink behind what transpired to be a cluster of four floodlights.
The following excerpts come from an a commercial article and only a few have been selected.
Why You Need an LED Heat Sink: Increasing light output & extending your LEDs lifetime
5 months ago by Taylor Scully 8,815 Views
Do LEDs produce heat?
A frequently listed advantage of LEDs is that they do not produce heat. In a way, this is true, LEDs are cool to the touch because they usually do not produce heat in the form of infrared (IR) radiation. This obviously doesn’t go for IR specific LEDs.
IR radiation is what actually heats incandescent bulbs and other light sources, making them hot to the touch. Without IR radiation, LEDs are able to be placed in spots where the heat from other sources would cause a problem (grow lights, reef tank lights, illuminating food, etc.).
Although LEDs are cool to the touch, within the devices themselves, there is plenty of unwanted heat. This heat comes from the inefficiency of the semiconductors that generate the light. The radiant efficiency (total optical output power divided by total electrical input power) of LEDs is typically between 5 and 40%, meaning that 60-95% of the input power is lost as heat. So what do you do with all this excess internal heat?!
Why should LED junction temperature be managed?
With high-power LEDs, it is crucial that you remove heat through efficient thermal management. Without good heat sinking, the junction (internal) temperature of the LED rises, causing the LED characteristics to change for the bad.
As the junction temperature of an LED increases, both the forward voltage and the lumen output decreases (see Picture 1). Not only is this decreasing the brightness and efficiency of your LED but this junction
temperature affects the overall lifetime of the LED as well. LEDs don’t usually fail catastrophically (although some may, especially if you over heat them); instead, the lumen output of the LED will decrease over time. Higher junction temperatures lead to faster LED deterioration. This is why it is crucial to keep your LED junction temperature low. Also take note that if you are over driving your LED (putting more current to it than what it is rated) this will drive temperatures up so high that permanent damage can occur.
The most important part of LED cooling is the thermal path from the LED junction to the outside of the light fixture. Heat needs to be conducted away from the LED in an efficient manner, and then removed from the area by some sort of cooling or dissipation.
This is where LED heat sinks come in.
Heat sinks are an important part of LED lighting because they provide the path for heat to travel from the LED light source to outside elements. Heat sinks are able to dissipate power in three ways: conduction (heat transfer from a solid to a solid), convection (heat transfer from a solid to a moving fluid, air in most cases), or radiation (heat transfer from two bodies at different temperatures through thermal radiation).
Although admittedly not Marine/Naval orientated; Read full article here at LEDsupply
--------------------------------
Providing a 'rather dim' effort for the Rolls Royce & Bentley enthusiasts
and .... what to do if the slot meter hasn't been kept Fed .... get the Fed's to provide illumination all the way!!!
Well .... you have to keep these subjects 'light' hearted
![Smile :)](./images/smilies/icon_e_smile.gif)
![Wink ;)](./images/smilies/icon_e_wink.gif)
You do not have the required permissions to view the files attached to this post.
Little h
- jbryce1437
- Posts: 1902
- Joined: Sun Aug 05, 2018 7:28 pm
- Location: Roker, Sunderland
Re: QEC Carriers
A far cry when we used to floodlight ship for ceremonials and for operation awkward. For cocktail parties we used gangway necklaces with different coloured lamps, thanks to dipping them in the Lino varnish "Gleam", suitably coloured with Brunswick Green, and other shades of paint.
Jim
Jim
HMS Raleigh 1963 , HMS Collingwood 1963 & 67 , HMS Ark Royal 1964-7, HMS Undaunted 1968-71, HMS Victory (Fleet Maintenance Group) 1971-72, HMS Exmouth 1972-74
JEM, EM, OEM, LOEM, POOEL
Then 28 years in the Fire Brigade
Retired since 2002
JEM, EM, OEM, LOEM, POOEL
Then 28 years in the Fire Brigade
Retired since 2002
- Little h
- Posts: 1727
- Joined: Sun Aug 12, 2018 6:53 pm
Re: QEC Carriers
Thanks for your contribution to the thread Jim.
Ah Yes Jim - I remember the 'Greenies retort' very well:- "you'll find bulbs in the garden - we issue lamps from this store"![Wink ;)](./images/smilies/icon_e_wink.gif)
Ah Yes Jim - I remember the 'Greenies retort' very well:- "you'll find bulbs in the garden - we issue lamps from this store"
![Wink ;)](./images/smilies/icon_e_wink.gif)
Little h
- Little h
- Posts: 1727
- Joined: Sun Aug 12, 2018 6:53 pm
Re: QEC Carriers
Some more of my observations on the Glamox FL60N Wide beam floodlights.
As their website identified they offer a variety of LED clusters and I believe that my observations may now include a) the twin floodlight (2 x module) and b) the quad LED floodlight cluster (4 x module) types, see:-
What appears to be the twin floodlight module/cluster
and more of the quad version (double click on image/attachment for a clear view)
this observation is purely that!!! as I am not able (as yet) to verify these positively as quad floodlight clusters/modules
-------------------------------------------------------------------
Plenty to go at though ... and this image suggests I may be on the right track (at least for the port side).
--------------------------------------------------------------------------------------
I have much prepared, some of which is destined for the Navigation Lights and Glare Shields thread on this forum.
As their website identified they offer a variety of LED clusters and I believe that my observations may now include a) the twin floodlight (2 x module) and b) the quad LED floodlight cluster (4 x module) types, see:-
What appears to be the twin floodlight module/cluster
and more of the quad version (double click on image/attachment for a clear view)
this observation is purely that!!! as I am not able (as yet) to verify these positively as quad floodlight clusters/modules
-------------------------------------------------------------------
Plenty to go at though ... and this image suggests I may be on the right track (at least for the port side).
--------------------------------------------------------------------------------------
I have much prepared, some of which is destined for the Navigation Lights and Glare Shields thread on this forum.
You do not have the required permissions to view the files attached to this post.
Little h
- ivorthediver
- Posts: 3672
- Joined: Fri Aug 10, 2018 8:42 pm
- Location: Cambridge Shore Battery
Re: QEC Carriers
Well who's been a busy boy then
Thanks Harry , I to use these on my models in the tugs search lights and deck floodlights , but heavily reduced in volts and only burns .02amps and has a life of over 100.000 hours so at 5p each a good investment
![Wink ;)](./images/smilies/icon_e_wink.gif)
Thanks Harry , I to use these on my models in the tugs search lights and deck floodlights , but heavily reduced in volts and only burns .02amps and has a life of over 100.000 hours so at 5p each a good investment
"What Ever Floats your Boat"
- Little h
- Posts: 1727
- Joined: Sun Aug 12, 2018 6:53 pm
Re: QEC Carriers
Yes Ivor; busy but not absolutely accurateivorthediver wrote: ↑Mon Jul 01, 2019 5:00 pm Well who's been a busy boy then![]()
Thanks Harry , I to use these on my models in the tugs search lights and deck floodlights , but heavily reduced in volts and only burns .02amps and has a life of over 100.000 hours so at 5p each a good investment
![Embarrassed :oops:](./images/smilies/icon_redface.gif)
See next post
Little h