Aircraft sampling detectors

Proximity fuzes (VT), which produced spectacular improvements in the effectiveness of anti-aircraft (and other) artillery in WWII, are also radar devices. The VT fuze has a sample amplifier connected with the equally simple oscillating detector and antenna when the output of the amplifier is of sufficient magnitude (ie, when the target comes within the kill-radius of the shell) the firing circuit (usually a fnyratron) triggers the detonation (Ref I) Refs 1) E. Luttwak, A Dictionary of Modern... 

Reply bv the Authors The Royal Air Force routinely takes wear debris samples from the oil systems of their aircraft which have been captured using a magnetic detector plug (MDP) in accordance with API 19, the RAF standard procedure for Early Failure Detection Centres. Once removed from the oil-line, the MDP are washed with solvent and inspected under an optical... 

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