B.A.E. HAWK
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cause binding with full and free movement on the tailplane.
The remaining vanes and plates are optional in their fitment, study a full size Hawk to
position these scale additions.
Setting up and Balancing
The final weight of your Hawk will vary with your turbine and radio equipment choice,
the prototype models varied between 11 and 12.5kg dry.
Set the Centre of Gravity at 190mm from the fuselage/wing break for the first flight with
the main tank empty and the header tank full. Further improvements in flight
performance will be seen if you laterally balance your aeroplane also.
Control throws
Experience has shown us that different pilots prefer different response “feel” so the
movements and expo figures quoted should be taken as a guide only. The all flying
tailplane (elevator control) requires extra care setting up the twin servo linkage. If you
carefully matched your servos in the earlier steps, little or no binding should occur. Note
when using digital servos some noise is normal when the control surface is moved, the
pitch of the sound will raise if the servos are under extreme load. A good tip is to
operate the elevator control with each linkage in turn only connected and listen to the
servos. When you connect the second linkage the sound should only change slightly.
Using a Powerbox unit with matchbox facility allows additional adjustment through the
centre and extremes of movement. A range of Powerbox products are available through
C-ARF.
Starting point movements
Aileron travel 16mm up and 18mm down Expo 25-35% (Positive JR/Spectrum-Negative
Futaba)
Elevator travel 30mm up and 25mm down 25-45% (Positive JR/Spectrum-Negative
Futaba)
Rudder 35mm left and right 15-35% (Positive JR/Spectrum-Negative Futaba)
Flaps. Take-off 25mm and Landing 65mm with the recommended Centre of Gravity there
is no elevator compensation required with flap deployment.
All dimensions are measured at the root trailing edge of any surface.
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