| 摘要 |
The invention relates to a motorised propulsion unit (5, 6) for an aircraft of the microlight type (1), particularly for a paraglider, with a motor (5) on a chassis (4) and driving an airscrew (6) via an automatic clutch comprising a centrifugal stage, which couples the airscrew (6) to a drive shaft when the speed is above a first threshold, and an axial clutch stage activated by the axial force developed by the airscrew (6) when it is driven by the drive shaft rotating at a speed above a second speed threshold greater than the first threshold. A braking device makes it possible to stop the airscrew (6) when the rotational speed of the drive shaft is below a threshold identical to the first threshold or close to it. Application especially to equipping microlights and particularly motorised parachutes. <IMAGE>
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