Flight Control Surfaces

Firebird flight control surfaces drawing and designations

The Firebird has four control surfaces, with roll controlled by the 2 ailerons, and pitch and yaw controlled by the v-tail ruddervators.

Firebird Flight Control Surfaces Isometric View Drawing

1	Right-wing aileron
2	Right v-tail
3	Left v-tail
4	Left-wing aileron

Deflection Information

The maximum and minimum deflections of the control surfaces are in degrees.

Control Surface	Maximum	Minimum
Aileron
V-tail

The maximum value is measured when the external edge of the control surface is pointing up, and the minimum deflection when pointing down.

Area

The area of the control surfaces is considered a rectangle.

Control Surface	Area
Aileron
V-tail

Required Torque

The required torque to actuate a surface is the torque required to maintain the servo in maximum deflection + the friction losses. This data is documented here.

Aileron Max. Deflection
Aileron Min. Deflection
Aileron friction losses
V-tail Max. Deflection
V-tail Min. Deflection
V-tail friction losses

Servo Information

The servo model is the same for all control surfaces of the aircraft. It must have a >4 torque safety coefficient to the maximum required torque to actuate the surface.

Servo Model	KST Coreless Motor X12-508
Max. Torque	6.20Kg⋅cm @8.4V
Max. Torque on the Control Surface
Aileron Safety Coefficient
V-tail Safety Coefficient
Operating Temperature Range	-20ºC to +65ºC