"griffin", 1935 ., a-10, american, americans, art, attack, aviation, b -17, b-17, b-2, background, bell 412/ch-146 griffon, boeing, bomber, clouds, company, december 17, developed by, douglas dc-3, f- 16, f-15e, f-16, fighter, fighters, fighting falcon, first, flight, flight- training, flying fortress, fourth, from, general dynamic., generation, heavy, helicopters, history, is used, landscape, lightweight, limited, mass, monoplane, multi-purpose, multifunctional, mustang, north american, of the engine, of the second world war, one, p -51, p-51, parking ., piston, plane, power, propeller, reliant, retro, rockets, san francisco, short-haul, sky, sr-9c, stinson, sunset, support, transport, two, united states air force, very, with a closed cabin, world, ‘gullwing airlines’