Vertically mounted engine driving main rotor via toothed belt as second-stage reduction gear.

垂直安装的引擎，该引擎作为第二阶段的减速齿轮齿形带主旋翼。

youdao

Vertically mounted engine driving main rotor via toothed belt as second-stage reduction gear.

垂直安装的引擎，该引擎作为第二阶段的减速齿轮齿形带主旋翼。

youdao