| Type | Single seat sportplane |
| Engine | 1 Anzani 50 hp |
| Dimensions | Length 5,17 m , height , span 6,89 m , wing area , |
| Weights | Empty , loaded 450 kg , max. take off weight |
| Performance | Max.. speed 125 km/h , cruising speed , range , endurance , service ceiling , climb |
| Type | Werk.Nr | Registration | History |
H.B.4 "Maja", sport airplane, 37kW / 50HP Anzani. Cantilever biplane without handles with a square plywood hull. Constructed by engineer Hoch from Austria. Single sample from 1927. Span 6,80m; lenght 5,17m; flight mass 450kg; Vm 125 km/h
