Five/six seat light utility helicopter type BO 105 features a rigid unarticulated main rotor with folding glass-fibre reinforced plastic blades, and the first prototype (with a conventional rotor) was a tested in 1966, three prototypes being followed by four pre-production examples, and production deliveries commencing during 1971. The German armed forces have acquired examples for evaluation. The third prototype was powered by 375 shp MTU 6022 turboshafts, but the production model has standardized on the Allison 250. Production is undertaken by the Siebel-werke-ATG subsidiary of MBB and some 140 BO 105s had been flown by the beginning of 1975. A seven-seat derivative, the BO 106, was flown on September 25, 1973.
| Country of origin | Federal Germany |
| Power Plant | Two 400 shp Allison 250-C20 turboshafts |
| Performance | Max speed 155 mph (250 km/h) at sea level |
| Max cruise 138 mph (222 km/h) | |
| Max inclined climb 1,870 ft/min (9,5 m/sec | |
| (Hovering ceiling (in ground effect) 7,610 ft (2 320 m) | |
| (out of ground effect) 5,085 ft (1,550 m) | |
| normal range 388 mls (625 km) at 5,000 ft (1,525m). | |
| Weights | Empty 2,360 lb (1,070 kg) |
| Normal take-off 4,630 lb (2,100 kg) | |
| Max take off 5,070 lb (2,300 kg) | |
| Dimensions | Rotor diam 32 ft 1 ¼ in (9.80 m) |
| Fuselage length 28 ft 01/3 in (8,55 m) |
