rwelshe N59984 I knew this aircraft as a Geophysical Survey aircraft with Aero Service. It was fitted with a Magnetometer tail boom and Bendix Doppler Radar Navigation system, Honeywell Radar Altimeter and a digital data recording system. Bob Welshe
MalcolmClarke N80DS Here's another one with a big "matchstick" attached to the tail, also from Aero Service. Seen at Rogers Aviation Service Centre, Cranfield Airport, just over from my back garden fence at the time. Malcolm.