Checking Wing Incidence
4.15 The wing bottom is relatively flat at the root. When mounted the wing bottom should be in alignment with the
angle of the fuselage top, and therefore also with the incidence of the stab. This 0 degrees incidence is important in the
proper flight characteristics of your plane. Negative incidence (wing bottom pointing down relative to the angle of the stab)
will cause your plane to tend to dive or sink under power, and will require abnormal "up" elevator trim to fly level. Conversely,
too much positive incidence will cause the plane to climb under power and will require "down" trim to fly level. Check
incidence prior to first flying the plane. Correct for error by adding 1/8" "shims" under the wing saddle at the leading or
trailing edge to make sure that changing the incidence solves a climbing or diving problem prior to trimming the wing saddle
to permanently correct it.
4.16 Turn on your radio and check for servo reversing, travel, etc. Adjust as necessary. If you need more travel, install
a larger servo horn rather than moving the clevis down on the surface control horn. Also check your throttle at this point
and make sure it is adjusted properly. Have an experienced modeler check it with you.
4.17 Install the antenna. Your antenna should be exposed and extended from the radio compartment to the tail of your
airplane. Drill a 1/16" hole in the side of your fuselage and run the antenna through the hole and back to the tail. Use a
rubber band and straight pin to connect the antenna to the tail. If you used the "hidden antenna" idea in evening one, push
the antenna through the antenna tube.
4.18 Check ailerons. Reinstall the wing, this time connecting the aileron servo to the radio. Turn on the radio and check
ailerons. Moving your right transmitter stick to the right should cause the right aileron to rise and the left one to fall. Moving
the stick to the left should cause the opposite to occur.
4.19 Recommended number of rubber bands: #64 rubber bands are used to install the wing to the fuselage. We
recommend you use no more than eight total rubber bands on the wing, three on each side and two crisscrossed under
the wing. This number is adequate to keep your wing on the plane, even during hi-"G" maneuvers, yet your wing will still
"pop" off in a severe impact, probably with no damage to the wing.
4.20 Recommended control throws:
Up Down
Elevator 3/8" 3/8"
Rudder 1" 1"
Ailerons 5/16" 5/16"
TROUBLE SHOOTING
NOSE OVER TENDENCIES IN HIGH GRASS - See Evening Three, Landing Gear, for instructions on how to solve.
CLIMBS OR DIVES WITH THROTTLE CHANGE - See Paragraph 4.15, "Checking Wing Incidence."
WING AND STAB NOT IN ALIGNMENT - See Paragraph 4.13 - "Alignment of wing and stab."
AILERON FLUTTER - With very high-powered (.45 and up) engines, under full throttle, especially in a nose-down powered
dive, you may notice aileron flutter, especially with the standard wing. There are two basic fixes for this condition, a
"modeler's" fix, and a fix from full-scale aircraft.
First check to insure that your aileron servo is firmly mounted in the wing, and check to make sure your linkages are tight
with no slack or play in them. If all is well, it's time to do a little work on the ailerons.
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