1.The turbine speed is reduced to that of the propeller by the use of gearing system.
2.Gears are used to transmit rotary motion from one shaft to another.
3.A flexible coupling is always fitted between the turbine rotor and the gearbox pinion.
4.A slight pinion misalignment and rotor permits flexible coupling.
5.In most of the installations, couplings are the flexible gear type.
P.s:La 1 si 4 nu stiu sigur daca e bine :) Sper ca te-am putut ajuta.