The following is a brief description of each maneuver. Study them and be
sure you understand each maneuver before you start your practice. Also, get the latest copy of the AMA Competition Regulations and study the rules, carefully.
- Take Off. The model must stand still on the ground
with the engine running, without being held. The model must then smoothly
accelerate to lift off. When the aircraft reaches take off speed, it should
gently lift off the ground at the center line and climb at a gradual angle (10 to 15 deg). The
airplane should hold a constant angle of climb without any dips or wing
rocking, or deviation in direction until it reaches a height of 2 meters.
- Enter the aerobatic box discribed as a flight realm of 60 deg.'s either side of the center line.
- Straight Flight Out. The model must be flown
exactly parallel to the flight line, perfectly straight and level, for a
distance of about 100 yds, centered on the pilot and judges. There must be no changes in
pitch, roll, yaw, or altitude.
- Stall Turn. Model performs a 1/4 loop beginning at the end of the box, following the 2-point roll.
The plane then flys straight up, performs a stall turn through 180 deg, dives straight down followed with another
1/4 loop of the same radii and enters straight and level flight in the opposite direction and same
altitude in which it entered.
- Straight Flight Back. Immediately after the Half
Reverse Cuban Eight, the model shall fly back along the same line as the
Straight Flight Out. The same rules apply.
- Half Reverse Cuban Eight. The model smoothly
pulls up to a 45 deg climb; hesitates, then does a half roll to inverted, then
hesitates the same as before, then executes a 5/8ths loop back to level flight
in the exact opposite direction. All radii must be equal. This maneuver must
be completed before the model exceeds the 60 deg maneuver boundary.
- Two Inside Loops. At the center, the model pulls up and
executes 2 consecutive inside loops, all of the same size and superimposed one on the
- Model exits box. turns around using any maneuver desired and sets up to
re-enter box on the same line as it exited.
- Model enters box
- Two Point Roll Model performs a half (1/2) roll inverted, hesitates about
1 second, then performs another half (1/2) roll in the same direction to level, upright
flight. The inverted portion of the flight must be centered on the pilot and judges.
- Half Cuban Eight. At the end of the box, model pulls up and executes a
five-eights (5/8) inside loop, when at 45 deg on top and inverted, model hesitates, half
rolls, hesitates, then pulls a one-eight (1/8) loop back
to level flight .
- Cobra without Rolls Model pulls to a 45 deg. climb, performs a quarter outside loop
(90deg) at the center line and then does a 45 deg dive back to the same altitude as the entry
point then pulls to level flight.
- Immelmann Turn. The maneuver starts near the end
of the maneuvering area, flying straight and level, the plane pulls up into a
1/2 inside loop, then rolls 180 deg at top of loop and returns straight and
level in the exact opposite direction as entered.
- 45 Degree Down Line (D) From level flight model pushes and executes a one-eighth (1/8) loop to a
45 degree dive, hesitates, then performs a one-eighth (1/8) inside loop to recover in level flight. The center
of this maneuver is the midpoint of the 45 degree line.
- Model exits box. turns around using any maneuver desired and sets up to
re-enter box on the same line as it exited.
- Model enters box
- Vertical Upline (U) on center From level upright flight model pulls and executes a one-quarter (1/4)
inside loop to a vertical flight path, hesitates, then performs a one-quarter (1/4) outside loop to recover in
upright flight at a higher altitude. The vertical up-line must be in the center.
- Split "S". Model proceeds in level flight to other
end of the box where it performs a half roll followed immediately by a half
loop, and returns to level flight at a lower altitude going in the opposite
direction, straight and level. This maneuver is considered a turnaround
maneuver.
- One Horizontal Roll. Model performs one
horizontal roll, centered on the pilot so that the inverted section is in
front of the pilot and judges, then finishes straight and level.
- Half Reverse Cuban Eight. The model smoothly
pulls up to a 45 deg climb; hesitates, then does a half roll to inverted, then
hesitates the same as before, then executes a 5/8ths loop back to level flight
in the exact opposite direction. All radii must be equal. This maneuver must
be completed before the model exceeds the 60 deg maneuver boundary.
- Double Immelmann w/o Rolls. Model pulls through one-half loop to level
, inverted flight, hesitates, then pulls through a second one-half loop to level, upright
flight at the same altitude as entry. The horizontal, inverted leg should be equal
to the diameter of the half loops.
- Landing. Landing will start from 2 meters above
the ground. The model flares smoothly in a nose-high attitude then smoothly
touches down within 15 meters of a point in front of the pilot. The airplane
should hold a constant angle of glide without any dips, yaw, wing rocking, or
deviation in direction until it touches down, with no bounces. Landing is
complete after a roll-out of 15 meters.
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