Type Single seat experimental
Engine 1 Walter Minor 4
Dimensions Length  5,86 m, height  ,  span  8,50 m, wing area  9,0 m2 ,
Weights Empty 320 kg, loaded  , max. take off weight  477 kg
Performance Max.. speed  230 km/h, cruising speed  200 km/h, ferry range 1900 km, practical range 750 km, endurance  , service ceiling  5000 m , climb
Type Werk.Nr Registration History
OK-BEL
The first aircraft completed was the Be.501 Bibi   (OK-BEI) with a 45 hp Walter Mikron II engine. (33 kW) . The second - Be.502 Bibi (OK-BEL) received a proven Walter Minor 4 engine with 85 hp. (62 hp).

Be.501 and Be.502 managed to take part in several competitions. No further development followed as the developers switched to the more advanced Be.550. After the annexation of Czechoslovakia, the aircraft were used in Luftwaffe flying schools.