AUTOMATIC CALLS FOR AID
Radio engineers have developed an automatic transmitter that will broadcast "SOS" continually for as long as three days after an aeroplane crashes, solving the problem of locating a fallen plane in a wilderness region. The two-tube transmitter is turned on by
a pendulum whenever a jolt occurs strong enough to throw the pendulum - forward into a position where it locks. It would be mounted in the tail of the plane, protected by asbestos and other insulation against fire and shock. A signal light informs ,the pilot if the pendulum is tripped by a hard but safe landing.
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https://paperspast.natlib.govt.nz/newspapers/EP19390213.2.47
Bibliographic details
Evening Post, Volume CXXVII, Issue 36, 13 February 1939, Page 7
Word Count
101AUTOMATIC CALLS FOR AID Evening Post, Volume CXXVII, Issue 36, 13 February 1939, Page 7
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