Unit, when not in use, will retract into position on ground, in order to reduce possible hazard to aircraft taking off over approach light system; two designs completed, one for hinged type and other for type that withdraws axially into metal housing sunk into ground; hinged type has operated satisfactorily in various kinds of weather during 18-mo use.
Development of retractable slope line approach light unit
U S Civ Aeronautics Administration -- Tech Development Report
1952
6 pages
Report
Englisch
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Modifications of slope line approach light system
Engineering Index Backfile | 1952
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