Following the B-1, another flying boat, the BB-1 (Boeing Model 7), emerged, built on the same design but slightly smaller. This aircraft could also transport two passengers. However, unlike the B-1, which featured separate passenger and pilot cabins, the BB-1 accommodated both pilot and passengers within a single, shared cockpit.
Unique Design Features
A distinctive construction feature was its interplane struts, which were V-shaped when viewed from the front. Such a design solution was a rarity in American aircraft manufacturing practice. The aircraft was powered by a 130 hp Hall-Scott L-4 engine.
Production and Legacy
As with the B-1, only a single example (serial No. 87) of the BB-1 was built. It successfully completed its maiden flight on January 7, 1920. Subsequently, this unique flying boat was sold to the Canadian company, “Aircraft Manufacturing Company of Vancouver.”
Technical Specifications
| Modification | Model 7 |
| Wingspan, m | 13. 80 |
| Aircraft length, m | 8. 40 |
| Aircraft height, m | 5. 50 |
| Wing area, m2 | 37. 44 |
| Empty weight | 920 |
| Maximum takeoff weight | 1224 |
| Engine type | 1 Piston engine Hall-Scott L-4 |
| Power, hp | 1 x 130 |
| Maximum speed, km/h | 135 |
| Cruising speed, km/h | 121 |
| Practical range, km | 805 |
| Service ceiling, m | 3048 |
| Crew, crew members | 1 |
| Payload: | 2 passengers |
Image and diagram gallery of the Boeing Model 7 (BB-1)
 Boeing Model 7 (BB-1) |
 Boeing Model 7 (BB-1) |
 Boeing Model 7 (BB-1) |
 Boeing Model 7 (BB-1) |
 Boeing Model 7 (BB-1) |