Transcript Slide 1

Idea Development
 To have a Better Understanding of
How Mechanically a Helicopter Flies
 Intrigue of part design
 A chance to better develop 3D
Modeling Skills
Final Assembly
Helicopter Principles
 Helicopters generate flight by spinning it rotor to revolve its
blades 360 degrees against the air. As the rotor spins and
the blades revolve, a pressure differential is created across
each blade producing lift.
 The Swash Plate controls the forward, backward, left and
right motions by controlling the angle of the main rotor
blades thus decreasing or increasing the differential of lift
across each of its blades.
 Servo motors control the operation of the swash plate. The
servos also regulate the pitch of the blades as they
revolve. Changing the pitch during flight allows the
helicopter to change directions and maneuver in 360
degree space.
 The yaw of a helicopter is the rotation of the helicopter
about its vertical axis.
Helicopter Principles Continued
 Servo Motors
Operating
SwashPlate
Unique Design Features of the
X.R.B SR Lama Sky Robo
 Twin Rotor System
– Twin Rotors counter-rotate reducing mechanical complexity.
– Eliminates Torque effects caused by a single large rotor blade
– Control and Stability greatly increased
– Tail Rotor is not required because one rotor is made to turn faster
thus creating a Torque that controls the Yaw axis.
– Lower rotor blade and head are controlled by the servo motors.
Servo motors control the lower rotor through the swash plate by
angling the lower rotor disk downwards or upwards to create an
elevator effect. By pitching the disk angle left or right there is an
aileron effect.
 Stabilizer Bar
– Connected to Upper rotor Blade and movement head
– Senses the helicopter’s body movements and automatically adjusts
the cyclic operation of the top blades to control rudder direction
opposite to body motion
Unique Design
Features Continued
Unique Design Features
Continued
Twin Rotor Operation Effect on
Wings
Clips From Test Flight