Welcome, Guest
Username: Password: Remember me
Photobucket image links are no longer allowed, as a matter of forum policy.
Your Mods have been doing a massive job in sorting out the photobucket issue, please assist them by posting directly to the thread and not through a 3rd party host.
Read More...

TOPIC: Airfield Lighting - Part 1

Airfield Lighting - Part 1 09 Dec 2011 17:45 #391

  • Ant1981
  • Ant1981's Avatar
  • Offline
  • Senior Member
  • Senior Member
  • Posts: 166
  • Thank you received: 0

kebecker;90708 wrote: one possible reason for the extended pole could be snow clearance, just a thought.

just had a look at this from Boston earlier this year

This image is hidden for guests.
Please log in or register to see it.



they are using marker poles to alert the snow ploughs to the lights location


From the distance, that looks like the normal height of an elevated taxiway light, which is shorter than the photo that sailor_moon has posted.

You'd be surprised though, the snow soon melts away once the lights are on and even on small use airfields such as military it's often advised to switch them on when they open the tower and leave them on all day to ensure they're clear.

There's clear to the eye, but then there's clear to the degree of coverage and spread pattern as up there, it all looks different.

Please Log in or Create an account to join the conversation.

Military Airfield Lighting and Controls Technician. Keen photographer and quite partial to a V8 engine.

Airfield Lighting - Part 1 09 Dec 2011 19:14 #392

  • canberra
  • canberra's Avatar
  • Offline
  • Platinum Member
  • Platinum Member
  • Posts: 4572
  • Thank you received: 52
Like Kebecker I also suspect that these lights may be raised for snow clearance, not every airfield clears snow like we do in the UK. As for putting the lights on to assist the snow clearance, do you know Ive never seen any station do that!

Please Log in or Create an account to join the conversation.

Airfield Lighting - Part 1 09 Dec 2011 20:11 #393

  • Ant1981
  • Ant1981's Avatar
  • Offline
  • Senior Member
  • Senior Member
  • Posts: 166
  • Thank you received: 0

canberra;91055 wrote: Like Kebecker I also suspect that these lights may be raised for snow clearance, not every airfield clears snow like we do in the UK. As for putting the lights on to assist the snow clearance, do you know Ive never seen any station do that!


The snow ploughs/runway clearing vehicles won't de ice or clear the snow from the lights perfectly. In the nicest possible way of course, when fully understood about coverage, light spread, lighting regulations, it isn't enough to clear the lights and expect the correct pattern from above. The lights will get very warm, which is a good way to assist in clearing them and keeping them clear.

I've watched it many times on airfields I have worked at as an airfield lighting and controls electrician and it's something we advise. For example, PAPIS have what is called 'black heat', a heater circuit to keep the ice off the lenses and filters inside as they'd otherwise need to be on full for 20 mins to give the output and coverage required by the JSP.

Please Log in or Create an account to join the conversation.

Military Airfield Lighting and Controls Technician. Keen photographer and quite partial to a V8 engine.

Airfield Lighting - Part 1 11 Dec 2011 21:06 #394

  • kebecker
  • kebecker's Avatar
  • Offline
  • Platinum Member
  • Platinum Member
  • Posts: 1908
  • Thank you received: 116
Some interesting material in a Transport Canada Advisory Circular 302-008 relating to elevated light fixtures

ELEVATED FIXTURES

Remove snow from around the lighting fixtures as soon as possible after a snowfall so the light fixtures are not obscured. If heavy snowfalls are predicted, plant red flags or reflective sticks of enough length next to the edge lights to mark their location. The flags will help snow removal and will lessen the damage to fixtures by snow removal equipment.

When flags or sticks are used, care is taken to ensure that the installation is secure and the devices will not be released so as to become FOD on the runway or taxiway.

FAA recoomedations regarding elevated lighting in snow areas:

The height of the lights should not exceed 14 inches when located within 5 feet of the runway or taxiway edge. In snow regions, where the lights are located beyond 5 feet from the runway or taxiway edge, the lights may be raised 2 inches for each foot beyond the 5 foot point. At the 10 foot position, the lights may have a maximum height of 30 inches . The increase in height is permitted only if any overhanging part of an aircraft expected to use the runway or taxiway could clear the light by at least 6 inches when the plane’s main landing gear is located on any part of the runway or taxiway

I am sure I have seen some manufactures guidance on keeping lights moisture free in winter operations,just a case of findin it

Please Log in or Create an account to join the conversation.

Airfield Lighting - Part 1 11 Dec 2011 22:12 #395

  • sailormoon_01_uk
  • sailormoon_01_uk's Avatar
  • Offline
  • Senior Member
  • Senior Member
  • Posts: 138
  • Thank you received: 1
Hi Guys

Thanks for the update, I have bought three more Airfield Lights off E-bay one is a Butlers Light see HERE , the other two lights are GEC ZA105's Unidirectional Approach/Runway Edge Lights, they have been modified to use 12 volt 55 watt H1 Auto Halogen Lamps,

This image is hidden for guests.
Please log in or register to see it.


This image is hidden for guests.
Please log in or register to see it.


Click on Photos to Enarge

All the Best

Colin

Please Log in or Create an account to join the conversation.

Airfield Lighting - Part 1 24 Jan 2012 14:49 #396

  • Carnaby
  • Carnaby's Avatar
  • Offline
  • Moderator
  • Moderator
  • Posts: 4479
  • Thank you received: 243
Thread getting big. Part 2 continues HERE

Please Log in or Create an account to join the conversation.

Plan A is always more effective when the problem you are working on understands that Plan B will involve the use of dynamite :twisted:.
Last Edit: by Carnaby. Reason: Relinked
Time to create page: 0.606 seconds
Powered by Kunena Forum

We use cookies to improve our website and your experience when using it. Cookies used for the essential operation of this site have already been set. By continuing to use this site you are agreeing to this. To find out more about the cookies we use and how to delete them, see our privacy policy.

  
EU Cookie Directive Module Information