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during the 1st & 2nd quarters and descending during the 3rd & 4th. Don't confuse these two different phenomena.

At the beginning of each 90° of roll, you may find it useful to pick an imaginary point the correct distance from your roll reference point an additional 90° of barrel roll away from your present position. Think of flying the nose of the aircraft smoothly toward that point (much as you fly the nose to a 90° visual reference point in a cloverleaf).

Profile:
(from behind) [[hand-drawn diagram of the Barrel Roll maneuver]]

Pitfalls:
1) "Dishing out" during last 180° of roll (i.e. excessive nose drop) - caused by not decreasing backpressure sufficiently and/or not starting roll soon enough from inverted.
2) ["Dishing out"]-1 - beginning the anticipatory roll properly when inverted, but following with insufficient backpressure and continuing roll too quickly.
3) Not going high enough at beginning - caused by beginning roll too soon. You need to get the nose started up first.

Note: climbing or descending barrel rolls will obviously end higher/lower and slower/faster than at entry. A reference point more than 10° from the level-flight horizon is probably excessive.

CHANDELLE

Entry Conditions: 400KIAS/95% RPM

Manuever: From level flight begin a climbing turn by increasing backpressure and then starting a roll in either direction.

Transcription Notes:
[[Diagram of Barrel Roll is labeled "~200k, R=180°" at top of roll, "R=90°" at right midpoint of roll, "~400k, R=0°" at bottom of roll, and "R=270°" at left midpoint of roll]]