Flight Instructors Training Procedures _revised AIC_x

AEROBATICS
HALF ROLL ENTRY INTO HORIZONTAL FIGURE OF EIGHT (REVERSE CUBAN EIGHT)
1. AIM
In this manoeuvre the aeroplane is divided to obtain the speed for entry into a loop and when the
aeroplane is climbing at an angle of 45° to the horizontal, the aeroplane is rolled to the inverted position
whilst climbing. From this inverted position the aeroplane immediately enters the downside of the loop
and when it has completed the loop and is once again climbing upright, having reversed direction, the
aeroplane is again rolled inverted in the climb and the looping manoeuvre is repeated.
2. PRE-FLIGHT BRIEFING
Refer to information provided in aerobatic exercises on the Loop, Slow Roll and Roll off the Top of a
Loop.
3. DESCRIPTION OF AIR EXERCISE
a. APPLICABLE PROCEDURES AND CHECKLISTS
b. AEROPLANE HANDLING TECHNIQUES:-
DEMONSTRATION OBSERVATION
1. HALF ROLL ENTRY INTO HORIZONTAL
FIGURE OF EIGHT
,
i. Lookout.
ii. Complete aerobatic checks – HASELL.
iii. Enter into the climb for a loop and when the
aeroplane’s longitudinal axis is at a climb angle
of 45° to the horizon, check climbing rate and
ensure wings level.
iv. With speed at ±2.5 Vs0, roll in the climb into the
inverted position – ensure wings level.
v. Pull nose through the horizon to the angle of
dive consistent with the downside of the loop.
vi. Just before reaching recommended speed for
the loop, start easing out of the dive.
vii. Continue around bottom arc of the loop until
the aeroplane’s longitudinal axis is 45° to the
horizon (i.e. 180˚ heading change prior to entry
for the manoeuvre).
viii. With speed at ±2.5 Vs0, roll in the climb into the
inverted position – check wings level.
ix. Repeat the second half of the manoeuvre as
detailed in (v) to (vii) above.
x. Aeroplane’s heading should now be the same
as that for entry into first half of the manoeuvre
xi. On completion of the manoeuvre, adjust flight
path and power required.
xii. Minimum height for the aeroplane to be at an
even keel is 2000ft agl.
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