N150M, McKinnon G-21D s/n 1251, in 1965 with four 340 hp Lycoming GSO-480-B2D6 supercharged piston engines just prior to its conversion to two 550 shp PT6A-20 turbine engines.
Photo Info
Photographer:
Gary L. Killion
Contact Gary L. Killion Please do NOT ask photographer about aircraft data, instead use forum for these questions