helicopter helicoptero marinha militar military navy portuguesa Portuguese to warplane aged antique background blue country crest cultural culture europe european flag free green grime grimy grunge grunged grungy image insignia nation national old page paper photo photograph picture Portugal pride proud red resource retro round sheet shield somadjinn stock stripe striped stripes texture textured vintage white yellow aeroplane airplane engine FAP helmet portuguese air force biplane drean wings alpha avi?o jacto jet jet plane aircraf CHIPMUNK DHC-1 trainer