raid on Danzig on September 7, searching in vain for Schleswig-Holstein . On September 8 all planes were bombed, while stationed on the sea near Hel on Hel Peninsula . Variants R-XIII prototype (conversion of R-XIV, no. 56.1) R-XIIIA - army cooperation aircraft, 30 produced from 1931 (nos 56.2-56.31) R-XIIIB -