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Aviation History
1942
1942 - 1036.PDF
482 FLIGHT MAY 14TH, 1942 A NEW LOCATION RECORDER efA _^— f^tflk. uu ?rni*' •i-**-*' r TB ___„/-* L_J ^**®*fc ^fc-"' •0-? A FLYING LABORATORY : A United Air Lines' twin-engined mag munication is conducted. The seats were removed from onesj«te*oT"fhe cabin to make room" in th^*fTcture below. American Firm's Device for ^Keeping Track of Airline Research Brings Success : Short-wave Equipment l/sj Direction-finding by/GroMid Stations Search work on radio corn iest equipment shown en mome; the aircr of ichines : \engthy Long-range \ (\^ K V em emselves; THERE is, of course, notning ne wireless direction-findiijg for plot of an aircraft at any g: grew up with the developmen' that is to say, as aircraft engir\es became more and more reliable, scheduled flights weni undertaken in more and more unfavourable weaker con ditions. By the time the present war s the system was working satisfactorily on the British and European air routes, and even the take-off and landing could be accom plished by means of wireless. For the location of an aircraft at any point along its route, two distinct systems were available: either ground stations (a minimum of three for accurate results) could transmit signals which were picked up by the aircraft, which carried direction-finding equipment on board, or the aircraft could transmit and the ground stations take a directional bearing on it, so that from the known positions of the stations and the direction from which the air craft's signals reached each, they could, by triangulation, work out the location of the aircraft and transmit the information to the pilot. The former system was rather more rapid, in that the ground, stations did not have to communicate wjiHone another before the " fix " could be given, but it entailed the carrying of more equipment in the aircraft. The actual landing by wireless guidance was by beams sent up by so-called marker awai m^Xie line of approa,Ri some distance the airfield. When thl pilot heard the pips' I in his eajphones he knejproat he was over the outer marker beafcon, and thaHte had to lose a certain amount pf height by thejjafe^he passed the inner marker Interior of the flying laboratory, with work bench and test stands.
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