Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 65
ed by the surrounding lights,as well as to the difficulty a night pilothas in concentrating on anything but hismachine. It was found that a light ofdistinctive shape was much more easilypicked up when surrounded by otherlights, and the local pilotage fights at Croydon and Lympne Aerodromes,… … Pro. 3.—Pilotage Laghl by Day. lamp placed within a 500 millimetredrum lens, and with a 36-inch parabolicreflector below it. This unit is super-imposed on a truncated cone, 21 feel indiameter at the base, 3 feet diameter atthe top, and l-j feel high. This cone isilluminated by four lamps similar to…
Lighting
Internet Archive · University of Toronto Libraries · Public Domain Mark 1.0. Free to use for anything.
