Top Flite TOPA0405 - Manual (Page 57)

throttle trim, however, other methods are
acceptable. This requirement applies to all
glow/gas ignition engines regardless of size.
Section 6.0: RADIO REQUIREMENTS
6.1 All transmitters must be FCC type certified.
6.2 FCC Technician or higher-class license required
for 6 meter band operation only.
Additional General Recommendations
Servos need to be of a rating capable to handle the
loads that the control surfaces impose upon the
servos. Standard servos are not recommended for
control surfaces. Servos should be rated heavy-duty.
For flight-critical control functions a minimum of
45 inch/ounces of torque should be considered. This
should be considered a minimum for smaller aircraft
and higher torque servos are strongly encouraged for
larger aircraft. The use of one servo for each aileron
and one for each stabilizer half is strongly
recommended. Use of dual servos is also
recommended for larger aircraft.
On-board batteries shall be 1000 mAh up to
20 lbs., 1200 mAh to 30 lbs., 1800 mAh to 40 lbs.
and 2000 mAh over 40 lbs. flying weight. The
number and size of servos, size and loads on
control surfaces, and added features should be
considered as an increase to these minimums.
Batteries should be able to sustain power to the
onboard radio components for a minimum of one
hour total flying time before recharging.
Redundant and fail-safe battery systems are
recommended.
The use of anti-glitch devices for long leads are
recommended
There is no maximum engine displacement limit, as
it is the position of this body that an underpowered
aircraft presents a greater danger than an
overpowered aircraft. However, the selection of
engine size relative to airframe strength and power
loading mandates good discretionary judgement by
the designer and builder. Current AMA maximums
for engine displacement are 6.0 cu. in. for two-stroke
and 9.6 cu. in. for four-stroke engines. These
maximums apply only to AMA Sanctions concerning
competition events (such as 511, 512, 515 and 520)
and, as such, the maximums apply. All IMAA (non
competition) events should be sanctioned as Class
“C” events, in which these engine size maximums
do not apply.
Generally, it is recommended that no attempt
should be made to fly a radio controlled model
aircraft with a gasoline engine in which the model
aircraft weight would exceed twelve (12) pounds
(underpowered) per cubic inch of engine
displacement, or be less than five (5) pounds
(overpowered) per cubic inch of engine
displacement. Example: Using a 3 cu. in. engine, a
model would likely be underpowered at an aircraft
weight greater than 36 pounds. With the same
engine, an aircraft weighing less than 15 pounds
would likely be overpowered.
Servo arms and wheels should be rated heavy
duty. Glass filled servo arms and control horns are
highly recommended.
Control surfaces linkages are listed in order of
preference:
1. Cable system (pull-pull). A tiller bar is highly
recommended along with necessary bracing.
2. Arrow Shaft, fiberglass or aluminum, 1/4" or
5/16" O.D. Bracing every six (6) to ten (10)
inches is highly recommended.
3. Tube-in-tube (nyrod). Bracing every few
inches is highly recommended. Inner tube
should be totally enclosed in outer tube.
4. Hardwood dowel, 3/8" O.D. Bracing every six
(6) to ten (10) inches is highly recommended.
- 57 -
THIS MODEL BELONGS TO:
NAME
ADDRESS
CITY STATE ZIP
PHONE #
AMA # / SFA #
Fill in the necessary information,
then cut out this placard and place it
inside of your model. Don’t forget to
protect it from fuel and moisture.