1/2 Cuban Eight

 

 

 

 

 

Model pulls up and executes five-eighths (5/8) inside loop to 45 degrees, hesitates, does one-half (1/2) roll, hesitates, then performs one-eight (1/8) inside loop back to level flight in the opposite direction as entry. Downgrades:

• Loop segments not round with the same size and radius.

• Model not at 45 degrees before and after half roll.

• Changes in heading in loop segments or after half roll.

• Half roll not centred in 45 degree line.

• No hesitations before or after half roll.

 

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1/2 Reverse Cuban Eight

 

 

 

 

 

 

Model pulls up and executes one-eighth (1/8) inside loop to 45 degrees, hesitates, does one-half (1/2) roll, hesitates, then performs five-eights (5/8) inside loop back to level flight in the opposite direction as entry. Downgrades:

• Loop segments not round with the same size and radius.

• Model not at 45 degrees before and after half roll.

• Changes in heading in loop segments or after half roll.

• Half roll not centred in 45 degree line.

• No hesitations before or after half roll.

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Hammerhead (Stall) Turn

 

  

 

 

Stall Turn   Model executes one-quarter (1/4) loop to a vertical track, performs a stall turn through 180 degrees, then recovers with another one-quarter (1/4) loop to level flight in the direction. ... The length of the vertical segment is not a judging criteria. Downgrades:

• Model not level at start and finish.

• Track does not become exactly vertical.

• Model not vertical at start and finish of ... stall turn.

• Return path not parallel to entry path.

• Exit not at same altitude as entry.

• Pivot radius greater than 1/2 wingspan.

• Pendulum movement after stall.

• Loop segments not round with same size and radius.

• There is more to this manoeuvre than meets the eye, so let's take a close look at this one section at a time.

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Immelman Manoeuvre  

 

 

 

 

 

 

 

 

The model starts the Immelman flying straight and level, pulls up into one-half (1/2) loop immediately followed by one-half (1/2) roll and finishes flying straight and level and exactly 180 degrees from the heading at entry. Downgrades:

• Model not level at start.

• Model deviates left or right during half loop.

• Half loop not completed exactly above point of commencement of half loop.

• Half roll does not commence immediately after half loop.

• Plane deviates from a straight line during roll.

• Model does not finish in level flight.

• Model heading does not finish exactly opposite the direction of entry.

• Half loop not round.

• In Novice and Sportsman class, manoeuvre does not start at centre line.

 

 

 

 

 

 

 

Landing Manoeuvre  

 

 

 

The landing manoeuvre will start two (2) meters from the ground. The model flares smoothly to a nose-high attitude, dissipating flying speed, then smoothly touches the ground, within the landing zone, with the main wheels first, with no bouncing or changes in heading after touchdown. The nose wheel on a tricycle gear and the tail wheel on a conventional (unless a "three (3) point landing" of mains and tail wheel touching simultaneously is executed) should settle gently to the ground after a brief rollout. The manoeuvre shall be considered complete once the plane has slowed below flying speed and has rolled straight for 15 meters.

The landing zone shall be marked by lines placed perpendicular across the runway and spaced 30 meters apart. The width of the landing zone shall be normally the width of the runway, but in no case shall exceed 30 meters. ... no downgrade will be given for any touch down within the zone but centred in front of the judging panel. The landing will not be downgraded if:
 

• Plane rolls straight to a controlled stop in less than 15 meters.

• Wing dips, unless they are not immediately corrected, which are caused by air turbulence.

• The pilot elects to "slip to a landing," to handle a crosswind condition, in which case the upwind wing will be low.

 

 

 

 

 

Loop Manoeuvre  

 

 

 

 

 

 

 

 

Model pulls up and executes the loop. The loop should be completely round. Downgrades:

• Loops not round.

• Exit not same altitude and heading as entry.

• Wings not level during loops.

 

 

 

Slow Roll  

 

 

 

 

 

Model rolls at a uniform rate through one (1) revolution in either direction. Centre is inverted portion of manoeuvre. Downgrades:

• Changes in heading during roll.

• Changes in altitude during roll.

• Roll rate not constant.

• Model does not perform exactly one roll. One Point per 15 Degree Rule.

 

 

 

 

 

Split S Manoeuvre  

 

 

 

 

 

 

 

 

 

Model performs one-half (1/2) roll in level flight then immediately executes one-half inside loop to level flight in opposite direction as entry. Downgrades:

• Half roll not 180 degrees.

• Half loop not started immediately after half roll.

• Half loop not constant radius.

• Changes in heading.

• One-half (1/2) roll not in level flight.

• Model heading does not finish exactly opposite the direction of entry.

 

 

 

    

        Straight

            &

  Inverted Flight  

 

 

Straight Flight  The model must be brought exactly parallel to the flight path and flown in an absolutely straight and level path. 

 (Distance does not matter.) Downgrades:

• Plane deviates left or right.

• Does not hold constant altitude.

• Gallops in yaw, roll, or pitch.

Inverted Flight  The model shall fly along a line inverted. Inverted Flight may be downgraded because:

• Turns or wiggles during inverted flight.

• Change in altitude.

• Gallops in pitch, yaw, or roll.

• Flight not along straight flight out path.

 

 

 

 

 

 

Take Off Manoeuvre

 

The model must stand still on the ground with the engine's) running, without being held. The throttle is then smoothly, not suddenly, advanced. After the takeoff roll has started, the nose wheel lifts off the ground (tail wheel for a conventional gear airplane), and the aircraft assumes a climb attitude while still rolling on its main wheels. When the aircraft reaches flying speed it should gently lift off the ground and climb at a gradual angle. The aircraft must not deviate in heading during the takeoff. The takeoff is completed when the model is approximately 2 meters (6 1/2 feet) from the ground. The takeoff should not be downgraded for wing dips caused by turbulence, unless the wings are not immediately levelled. Centre of manoeuvre is lift-off. Downgrades:

• Model does not stand still when released.

• Changes heading during takeoff and climb.

• Model jumps from the ground.

• Retouches ground after becoming airborne.

• Too steep a climb angle.

• Gallops in elevation during climb.

• Wings not level at any time.

• Throttle not accelerated smoothly.