CS-VLA 203 Turning flight and accelerated stalls
ED Decision 2003/18/RM
Turning flight and accelerated stalls must be demonstrated in tests as follows:
(a) Establish and maintain a coordinated turn in a 30 degree bank. Reduce speed by steadily and progressively tightening the turn with the elevator until the aeroplane is stalled or until the elevator has reached its stop. The rate of speed reduction must be constant, and -
(1) For a turning flight stall, may not exceed 1,9 km/h (one knot) per second; and
(2) For an accelerated stall, be 5,6 to 9,3 km/h (3 to 5 knots) per second with steadily increasing normal acceleration.
(b) When the stall has fully developed or the elevator has reached its stop, it must be possible to regain level flight by normal use of controls and without -
(1) Excessive loss of altitude;
(2) Undue pitchup;
(3) Uncontrollable tendency to spin;
(4) Exceeding 60 degree of roll in either direction from the established 30 degree bank; and
(5) For accelerated entry stalls, without exceeding the maximum permissible speed or the allowable limit load factor.
(c) Compliance with the requirements of this paragraph must be shown with -
(1) Wing Flaps: Retracted and fully extended for turning flight and accelerated entry stalls, and intermediate, if appropriate, for accelerated entry stalls;
(2) Landing Gear: Retracted and extended;
(3) Cowl Flaps: Appropriate to configuration;
(4) Power: 75% maximum continuous power; and
(5) Trim: 1.5 VS1 or minimum trim speed, whichever is higher.
Very Light Aeroplanes must demonstrate safe stall recovery in turning flight and accelerated conditions. Speed reduction during turns must be controlled. Recovery from a stall requires normal controls, minimal altitude loss, and no excessive pitch, spin, or roll. Tests cover various flap, gear, power, and trim configurations.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
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