| 摘要 |
FIELD: transportation. ^ SUBSTANCE: rescue helicopter includes fuselage (1) and coaxial propellers (4), at that there can be two or more propellers and they can have different diameter. At least one of the propellers is controlled with variable increment, and the rest - with fixed diameter. In the second variant the propeller has tail boom (5) with elastic expander tube (5) at the end, at that, when tail boom is raised derating is blocked. In the third variant, engine and reducing gear are located in separate engine nacelle (2) positioned over fuselage on suspension towers and/or elastic inserts. ^ EFFECT: increase operation efficiency of lifting propeller. ^ 5 cl, 4 dwg
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