
O.E Pat Tibbs (left) E.R. 'Dutch Gelvin and un-identified flight test personel.
Pat Tibbs was the Chief Test Pilot of the Martin Aircraft Company. He made the maiden flights of many aircraft, including these listed below
AM-1 Mauler performed its initial flight on 26 August 1944
XP4M-1 "Mercator" performed its initial flight on 
XB-48 performed its initial flight on 22 June 1947
XB-51 performed its initial flight on 
B-57A performed its initial flight on