Main Rotor Sevo

Question 1

Where are the 3 located

Answer 1

Mounted on main gearbox and attached to stationary swashplate

Fwd - fwd right(2 oclock), lateral- aft right (5 oclock), aft- aft left(8 oclock

Question 2

Function

Answer 2

Concerts mechanical input into pressure controlled output main rotor in all modes of flight

Question 3

What is it powered by

Answer 3

First stage hydraulic system at 3000 psi
2nd stage at 3000 psi

Question 4

Power piston

Answer 4

Converts hydraulic pressure into mechanical motion

Question 5

Piston guide

Answer 5

Reduces power surface working area preventing unequal force

Question 6

Separator

Answer 6

Separates flight stage main rotor servo from second stage main rotor servo

Question 7

Vent

Answer 7

Prevents vacuum lock on the piston when in motion

Question 8

Pilot valve

Answer 8

(2)
Allow fluid transfer to control power piston

Question 9

Bypass. Alve

Answer 9

Prevents hydraulic lock on the sevo when the system is unpressurized

Question 10

Sloppy link

Answer 10

Allows inital movement of the pilot valve

Question 11

Follow up arm

Answer 11

Recenter pilot valve

Question 12

Stationa scissors

Answer 12

Fwd left side MGB attached to stationary swashplate(11 oclock)
Substitutes the need for a fourth main rotor sevo

Question 13

SERVO OFF switches

Answer 13

Allows the pilots the secure a stage of the servo fwd-1st, Aft-2nd