XCell Spectra-G Model – Additional Operators Guide
Page 9 of 16
Copyright
12/5/2004
Miniature Aircraft USA
3.8. Rotor Blades
Rotor blades are a personal choice and you will choose the type and weight of rotor blade
that best fits your flying style. Experience has shown that the following rotor blade lengths
provide the best results with this model:
Standard Rotor Head – 710mm rotor blades
Tempest Rotor Heads – 700 mm rotor blades
3.9. Head Damping
Follow the instructions concerning the initial head damping options. You will probably adjust
this according to your personal flying style however keep in mind that this model is heavier
than our other models, so in general stiffer damping will be needed to maintain proper head
response. Use at least the 60 durometer dampers.
3.10. Pitch Curves
Follow the pitch curve setup instructions provided in the instruction guide. There is a
misconception that pitch curves should be set at higher pitches with gasoline motors because
of their additional torque. This is a misconception and should not be followed. Excessive high
and low main rotor pitch will un-necessarily load the engine.
Set the initial high and low pitch settings at no more than +10 degrees and –10 degrees. After
the motor is broken in, you may experiment with other settings however be careful to not
excessively load the motor at extreme pitch ranges.
3.11. Antenna Routing
The model has been tested with both whip and full length wire antennas and both have
worked adequately.
It is recommended to use the full length wire antenna and use the provided antenna routing
materials and path found in the instructions. These are known to work properly and minimize
the chance of RF interference from the ignition system.
3.12. Receiver Crystals
It is recommended that you secure the crystal for your receiver with a piece of tape. This will
prevent it from eventually vibrating loose. If the crystal should become loose, it will result in
loosing radio control of the model.
3.13. Carburetor Mount Bolts
When installing or re-installing the carburetor, do NOT over-tighten the bolts that hold the
carburetor to the mounting block. The mounting block contains metal nuts and if the bolts are
too tight it can cause the isolator block to crack around these nuts. If the block cracks, it will
allow air to leak into the engine and it will run lean. This condition will be very difficult to
diagnose and the motor will not run properly until this is corrected.
