Idea Development Idea Development

To have a Better Understanding of To have a Better Understanding of How Mechanically a Helicopter Flies How Mechanically a Helicopter Flies

Intrigue of part design Intrigue of part design A chance to better develop 3D A chance to better develop 3D

Modeling SkillsModeling Skills

Final AssemblyFinal Assembly

Helicopter Principles Helicopter Principles

Helicopters generate flight by spinning it rotor to revolve its Helicopters generate flight by spinning it rotor to revolve its blades 360 degrees against the air. As the rotor spins and blades 360 degrees against the air. As the rotor spins and the blades revolve, a pressure differential is created across the blades revolve, a pressure differential is created across each blade producing lift. each blade producing lift.

The Swash Plate controls the forward, backward, left and The Swash Plate controls the forward, backward, left and right motions by controlling the angle of the main rotor right motions by controlling the angle of the main rotor blades thus decreasing or increasing the differential of lift blades thus decreasing or increasing the differential of lift across each of its blades.across each of its blades.

Servo motors control the operation of the swash plate. The Servo motors control the operation of the swash plate. The servos also regulate the pitch of the blades as they revolve. servos also regulate the pitch of the blades as they revolve. Changing the pitch during flight allows the helicopter to Changing the pitch during flight allows the helicopter to change directions and maneuver in 360 degree space.change directions and maneuver in 360 degree space.

The yaw of a helicopter is the rotation of the helicopter The yaw of a helicopter is the rotation of the helicopter about its vertical axis.about its vertical axis.

Helicopter Principles ContinuedHelicopter Principles Continued

Servo Motors Servo Motors Operating Operating SwashPlate SwashPlate

Unique Design Features of Unique Design Features of thethe X.R.B SR Lama Sky Robo X.R.B SR Lama Sky Robo

Twin Rotor SystemTwin Rotor System– Twin Rotors counter-rotate reducing mechanical complexity.Twin Rotors counter-rotate reducing mechanical complexity.– Eliminates Torque effects caused by a single large rotor blade Eliminates Torque effects caused by a single large rotor blade – Control and Stability greatly increasedControl and Stability greatly increased– Tail Rotor is not required because one rotor is made to turn faster Tail Rotor is not required because one rotor is made to turn faster

thus creating a Torque that controls the Yaw axis.thus creating a Torque that controls the Yaw axis.– Lower rotor blade and head are controlled by the servo motors. Lower rotor blade and head are controlled by the servo motors.

Servo motors control the lower rotor through the swash plate by Servo motors control the lower rotor through the swash plate by angling the lower rotor disk downwards or upwards to create an angling the lower rotor disk downwards or upwards to create an elevator effect. By pitching the disk angle left or right there is an elevator effect. By pitching the disk angle left or right there is an aileron effect.aileron effect.

Stabilizer BarStabilizer Bar– Connected to Upper rotor Blade and movement headConnected to Upper rotor Blade and movement head– Senses the helicopter’s body movements and automatically adjusts Senses the helicopter’s body movements and automatically adjusts

the cyclic operation of the top blades to control rudder direction the cyclic operation of the top blades to control rudder direction opposite to body motionopposite to body motion

Unique Design Unique Design Features Continued Features Continued

Unique Design Features Unique Design Features Continued Continued

Twin Rotor Operation Effect on Twin Rotor Operation Effect on Wings Wings

Clips From Test FlightClips From Test Flight