Anybody got any information regarding lighting consisting of double threshold lights.
I. E. 11 lights and 11 lights. The light fittings were holophane LR23. Era 1959s 1960s. Adsing to this 4 sodiums fodr wingbar were installed.
Yes but lights are omnidirectional. There are 11 at the threshold followed by transformer pit and then again 11 omnidirectional fittings. I know there were omnidirectional because the fitting casting shows LR23/B.
Are we discussing a particular airfield? Many of the disused sites I've visited which were active in the fifties and sixties exhibit significantly different runway lighting. Bovingdon, East Kirkby, Elvington and Hemswell spring immediately to mind. The word consistency seemed to have dropped from the English Language for the duration.
Plan A is always more effective when the problem you are working on understands that Plan B will involve the use of dynamite
jpfive wrote: Yes but lights are omnidirectional. There are 11 at the threshold followed by transformer pit and then again 11 omnidirectional fittings. I know there were omnidirectional because the fitting casting shows LR23/B.
Flush fitting threshold lighting is never 'omni directional'; it is always uni-directional showing only to an aircraft on final approach.
jpfive wrote: Edge lights spacing from threshold. First one 45m rest 60m.Wher can i find a publication of airfield requirements in those years.
Normal raised edge light spacing on a British military airfield is uni directional every 30m and co located omni directional every 90m.
Civil airfields usually have raised edge lights every 60m which are in a single unit giving a bi-directional high intensity output and a low intensity omni directional output.
jpfive wrote: The fittings installed were omni directional both rows. Can it be they had filters to block the light in 1 direction.
I suppose it's possible, but what would be the point in having an omni directional light then 'blocking' the output through most of the visible arc?(Unless they didn't have uni directional available but had a surplus of omnis')