In combat, the Z.501 were pressed into service mainly for their reconnaissance capabilities but also served in search and rescue sorties. In either case, the aircraft performed superbly thanks to the type's long range capabilities and loitering times. Losses of the system were high as is expected with these slow flying boat types but the aircraft saw action against French and British forces nonetheless and also took part in the Spanish Civil War before that. Aircraft production in wartime necessitated the need for speed and as such many were sent off the production lines in less than stellar operating condition. If the Z.501 had a blotch on its otherwise adequate operating record it was in the wooden fuselage construction which had a tendency to break up in rough waters. As an aircraft, the Z.501 fared better than as an ocean-going craft. In terms of combat performance, the Z.501 was nothing to speak of - finishing the war without a single air-to-air kill.
The Z.501 did go on to break several distance endurance records during its production run.
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