| 摘要 |
Main helicopter drive (1) for transmitting drive to the countershaft (4) even when the main shaft (3) connected to the rotor is idle, and on which a sleeve (10), turned by a drive shaft (2) and connected by gears (16, 17) to the countershaft, supports in rotary and axially-sliding manner, an inner tubular body (25) angularly integral with the main shaft (3); an actuator (40) being connected to the said tubular body (25) for moving it between a normal position, in which the said tubular body (25) is connected to the said sleeve (10) by a freewheel (32) on the latter, and a position in which the said freewheel (32) engages the outer casing (34) of a bearing (33) fitted on to the said tubular body (25). <IMAGE> |
