Type Two seat trainer  RK II Two seat trainer  RK IIa Two seat trainer  RK IIb Two seat trainer  RK IIc
Engine 1 Siemens Sh 11 1 Siemens Sh 11 1 ADC Cirrus II 1 Siemens Sh 12
Dimensions Length 7,00 m, height 2,60 m, span 10,40 m, wing area 26,50 m2, aspect ratio 4,1
Length 7,89 m, height 2,70 m, span 10,90 m, wing area 26,80 m2, aspect ratio 4,5 Length 7,89 m, height 2,70 m, span 10,90 m, wing area 26,80 m2, aspect ratio 4,5 Length 7,27 m, height 2,70 m, span 10,90 m, wing area 26,80 m2, aspect ratio 4,5
Weights Empty kg 540 kg, flying weight 760 kg, fuel 60 kg, oil 10 kg, pilot 80 kg, payload 70 kg, wing loading 28,7 kg/m2 Empty kg 570 kg, flying weight 840 kg, fuel 72 kg, oil 14 kg, pilot 80 kg, payload 104 kg, wing loading 31,4 kg/m2 Empty kg 530 kg, flying weight 840 kg, fuel 72 kg, oil 14 kg, pilot 80 kg, payload 144 kg, wing loading 31,4 kg/m2 Empty kg 610 kg, flying weight 860 kg, fuel 72 kg, oil 14 kg, pilot 80 kg, payload 84 kg, wing loading 32 kg/m2
Performance Max. speed 120 km/h at sea level, climb 1,7 m/sec., range 360 km, landing speed 45-50 km/h Max. speed 130 km/h at sea level, climb 1,3 m/sec., range 560 km, service ceiling 3200 m, landing speed 65 km/h Max. speed 130 km/h at sea level, climb 1,2 m/sec., range 780 km, service ceiling 2800 m, landing speed 65 km/h Max. speed 145 km/h at sea level, climb 1,7 m/sec., range 420 km, landing speed 75 km/h
Type Two seat trainer  RK IId Two seat trainer RK IIe Two seat seaplane RK IIf
Engine 1 Walter 1 Siemens Sh 14 1 Walter
Dimensions Length  , height  ,  span  , wing area   ,
Weights Empty , loaded  , max. take off weight  
Performance Max.. speed  , cruising speed  , range , endurance  , service ceiling   , climb
RK 2a, put into series production