Procedures - P-330

T-34C CONTACT

CHAPTER ELEVEN

General. The Barrel Roll will help develop your confidence, coordination and "sense of

feel" while flying the aircraft through rapidly changing attitudes and airspeeds. Since attitude,

heading, etc. change so rapidly, this is an excellent maneuver for developing your ability to

maintain orientation.

Procedures

CONFIGURATION: Transition to aerobatic cruise. CHECKLIST: Complete the

Aerobatic Checklist. CLEARING TURN: Commence a clearing turn and roll out

on or parallel to a section line. Pick a prominent reference point on the horizon 90 to

either side of the nose, in the direction you intend to perform the maneuver.

Recheck the wings level and clear the airspace above you. Just prior to entry, check

and report the entry altitude over the ICS. Commence the maneuver by smoothly

raising the nose while keeping the wings level. As the exhaust stacks pass the

horizon, roll and pull so that the nose travels around in an arcing path towards the

selected 90 checkpoint. After 45 of turn, the angle of bank should be 90 and the

nose will be at its highest point during the maneuver (approximately 55-60 degrees

above the horizon).

Continue rolling the aircraft at a constant rate until in a wings level, inverted attitude,

heading directly at the 90 reference point on the horizon. Your nose should be

slightly above the horizon and the airspeed between 90 and 100 KIAS. Fly the

aircraft through the inverted position and continue rolling at a constant rate,

completing the maneuver on the original heading and altitude at aerobatic cruise

airspeed. Maintain a positive "G" load throughout the maneuver. If performed

properly, 2.0 Gs should not be exceeded at any time during the maneuver.

The nose should appear to make an arcing path about the imaginary point on the

horizon 45 from your original heading. The last half of the arc will, therefore, be the

same distance below the horizon that the first half is above the horizon. Remember,

as the airspeed decreases towards the top of the maneuver, it will be necessary to

increase the deflection of the ailerons, rudder, and elevator to maintain a constant rate

of pitch and roll. Conversely, as the airspeed increases towards the bottom of the

maneuver it will be necessary to decrease the deflection of the ailerons, rudder, and

elevator to maintain a constant rate of pitch and roll. Notice that this roll is started as

a climbing turn, which then becomes a continuous roll at a constant rate.

Maintain orientation throughout the maneuver by concentrating on your reference

points. Maintain a constant rate of roll and nose movement. Inscribing a small arc

above the horizon in the first half of the maneuver and a larger arc below the horizon

in the last half will result in too great an airspeed at the completion of the maneuver

or unnecessarily high "G" forces to recover on airspeed. During the roll out to the

original heading, adjusting the backstick pressure will enable you to recover on

altitude and at aerobatic cruise airspeed.

AEROBATIC MANUEVERS 11-9