AOPA Turbine Pilot Magazine - June 2020 - T-17
engine during the takeoff roll will commonly be climbing to 1,500 feet agl at only
20 percent above the actual stall speed for
the current weight, whereas a piston twin
may perform a single-engine climbout with
closer to a 40-percent margin over stall.
VEF Our final speed that constrains and
guides the calculated speeds is VEF, engine
failure speed. This is the speed at which the
engine is failed during the performance testing and validation of the aircraft before it
is certified. The manufacturer is allowed
to select VEF (at or above VMCG), but must
use the same VEF to demonstrate both an
aborted takeoff and a continued takeoff.
Selection of an optimal VEF is essential for minimizing the runway
required for takeoff.
Now, on to the calculated speeds.
V1 The first, and lowest, calculated speed
for takeoff is V1. Unfortunately, what V1 represents is widely misunderstood by pilots.
Often, pilots believe it is "takeoff decision
speed," or the highest speed at which an
engine can fail and the pilot can properly abort the takeoff. This is subtly,
but critically, incorrect.
Rather, V1 is defined
i n t h e f e d e ra l
aviation regulations as "the maximum speed
in the takeoff at which the pilot must take the
first action (e.g., apply brakes, reduce thrust,
deploy speed brakes) to stop the airplane
within the accelerate-stop distance." If the
THE WHOLE idea of balanced takeoff
performance is to ensure that the distance
to complete a takeoff to 35 feet agl and
the distance to stop on the runway are
the same. To realize that condition, test
pilots experiment with higher and lower V1
values. Too low a V1 means you can easily
stop on the remaining runway, but won't
accelerate fast enough to reach V2 within
the length of the runway. Too high a V1,
and you won't have enough runway to
stop if you decide to abort the takeoff. In
this illustration, both airplanes begin the
takeoff, experience an engine failure or
other critical event at VEF, then either fly
or reject the takeoff at V1. Both scenarios
have safe outcomes, whether they continue the takeoff or carry out a rejected
takeoff (RTO). The RTO means power to
idle, aggressive braking-or using the RTO
feature of an autobrake system-as well as
deploying speed brakes or spoilers.
aopa.org/pilot AOPA PILOT | T-17
http://www.aopa.org/pilot
AOPA Turbine Pilot Magazine - June 2020
Table of Contents for the Digital Edition of AOPA Turbine Pilot Magazine - June 2020
Contents
AOPA Turbine Pilot Magazine - June 2020 - Intro
AOPA Turbine Pilot Magazine - June 2020 - Cover1
AOPA Turbine Pilot Magazine - June 2020 - Cover2
AOPA Turbine Pilot Magazine - June 2020 - Contents
AOPA Turbine Pilot Magazine - June 2020 - 2
AOPA Turbine Pilot Magazine - June 2020 - 3
AOPA Turbine Pilot Magazine - June 2020 - 4
AOPA Turbine Pilot Magazine - June 2020 - 5
AOPA Turbine Pilot Magazine - June 2020 - 6
AOPA Turbine Pilot Magazine - June 2020 - 7
AOPA Turbine Pilot Magazine - June 2020 - 8
AOPA Turbine Pilot Magazine - June 2020 - 9
AOPA Turbine Pilot Magazine - June 2020 - 10
AOPA Turbine Pilot Magazine - June 2020 - 11
AOPA Turbine Pilot Magazine - June 2020 - 12
AOPA Turbine Pilot Magazine - June 2020 - 13
AOPA Turbine Pilot Magazine - June 2020 - 14
AOPA Turbine Pilot Magazine - June 2020 - 15
AOPA Turbine Pilot Magazine - June 2020 - 16
AOPA Turbine Pilot Magazine - June 2020 - 17
AOPA Turbine Pilot Magazine - June 2020 - 18
AOPA Turbine Pilot Magazine - June 2020 - 19
AOPA Turbine Pilot Magazine - June 2020 - 20
AOPA Turbine Pilot Magazine - June 2020 - 21
AOPA Turbine Pilot Magazine - June 2020 - 22
AOPA Turbine Pilot Magazine - June 2020 - 23
AOPA Turbine Pilot Magazine - June 2020 - 24
AOPA Turbine Pilot Magazine - June 2020 - 25
AOPA Turbine Pilot Magazine - June 2020 - 26
AOPA Turbine Pilot Magazine - June 2020 - 27
AOPA Turbine Pilot Magazine - June 2020 - 28
AOPA Turbine Pilot Magazine - June 2020 - 29
AOPA Turbine Pilot Magazine - June 2020 - 30
AOPA Turbine Pilot Magazine - June 2020 - 31
AOPA Turbine Pilot Magazine - June 2020 - 32
AOPA Turbine Pilot Magazine - June 2020 - 33
AOPA Turbine Pilot Magazine - June 2020 - 34
AOPA Turbine Pilot Magazine - June 2020 - 35
AOPA Turbine Pilot Magazine - June 2020 - 36
AOPA Turbine Pilot Magazine - June 2020 - 37
AOPA Turbine Pilot Magazine - June 2020 - 38
AOPA Turbine Pilot Magazine - June 2020 - 39
AOPA Turbine Pilot Magazine - June 2020 - 40
AOPA Turbine Pilot Magazine - June 2020 - 41
AOPA Turbine Pilot Magazine - June 2020 - 42
AOPA Turbine Pilot Magazine - June 2020 - 43
AOPA Turbine Pilot Magazine - June 2020 - 44
AOPA Turbine Pilot Magazine - June 2020 - 45
AOPA Turbine Pilot Magazine - June 2020 - 46
AOPA Turbine Pilot Magazine - June 2020 - 47
AOPA Turbine Pilot Magazine - June 2020 - 48
AOPA Turbine Pilot Magazine - June 2020 - T-1
AOPA Turbine Pilot Magazine - June 2020 - T-2
AOPA Turbine Pilot Magazine - June 2020 - T-3
AOPA Turbine Pilot Magazine - June 2020 - T-4
AOPA Turbine Pilot Magazine - June 2020 - T-5
AOPA Turbine Pilot Magazine - June 2020 - T-6
AOPA Turbine Pilot Magazine - June 2020 - T-7
AOPA Turbine Pilot Magazine - June 2020 - T-8
AOPA Turbine Pilot Magazine - June 2020 - T-9
AOPA Turbine Pilot Magazine - June 2020 - T-10
AOPA Turbine Pilot Magazine - June 2020 - T-11
AOPA Turbine Pilot Magazine - June 2020 - T-12
AOPA Turbine Pilot Magazine - June 2020 - T-13
AOPA Turbine Pilot Magazine - June 2020 - T-14
AOPA Turbine Pilot Magazine - June 2020 - T-15
AOPA Turbine Pilot Magazine - June 2020 - T-16
AOPA Turbine Pilot Magazine - June 2020 - T-17
AOPA Turbine Pilot Magazine - June 2020 - T-18
AOPA Turbine Pilot Magazine - June 2020 - T-19
AOPA Turbine Pilot Magazine - June 2020 - T-20
AOPA Turbine Pilot Magazine - June 2020 - 49
AOPA Turbine Pilot Magazine - June 2020 - 50
AOPA Turbine Pilot Magazine - June 2020 - 51
AOPA Turbine Pilot Magazine - June 2020 - 52
AOPA Turbine Pilot Magazine - June 2020 - 53
AOPA Turbine Pilot Magazine - June 2020 - 54
AOPA Turbine Pilot Magazine - June 2020 - 55
AOPA Turbine Pilot Magazine - June 2020 - 56
AOPA Turbine Pilot Magazine - June 2020 - 57
AOPA Turbine Pilot Magazine - June 2020 - 58
AOPA Turbine Pilot Magazine - June 2020 - 59
AOPA Turbine Pilot Magazine - June 2020 - 60
AOPA Turbine Pilot Magazine - June 2020 - 61
AOPA Turbine Pilot Magazine - June 2020 - 62
AOPA Turbine Pilot Magazine - June 2020 - 63
AOPA Turbine Pilot Magazine - June 2020 - 64
AOPA Turbine Pilot Magazine - June 2020 - 65
AOPA Turbine Pilot Magazine - June 2020 - 66
AOPA Turbine Pilot Magazine - June 2020 - 67
AOPA Turbine Pilot Magazine - June 2020 - 68
AOPA Turbine Pilot Magazine - June 2020 - 69
AOPA Turbine Pilot Magazine - June 2020 - 70
AOPA Turbine Pilot Magazine - June 2020 - 71
AOPA Turbine Pilot Magazine - June 2020 - 72
AOPA Turbine Pilot Magazine - June 2020 - 73
AOPA Turbine Pilot Magazine - June 2020 - 74
AOPA Turbine Pilot Magazine - June 2020 - 75
AOPA Turbine Pilot Magazine - June 2020 - 76
AOPA Turbine Pilot Magazine - June 2020 - 77
AOPA Turbine Pilot Magazine - June 2020 - 78
AOPA Turbine Pilot Magazine - June 2020 - 79
AOPA Turbine Pilot Magazine - June 2020 - 80
AOPA Turbine Pilot Magazine - June 2020 - 81
AOPA Turbine Pilot Magazine - June 2020 - 82
AOPA Turbine Pilot Magazine - June 2020 - 83
AOPA Turbine Pilot Magazine - June 2020 - 84
AOPA Turbine Pilot Magazine - June 2020 - 85
AOPA Turbine Pilot Magazine - June 2020 - 86
AOPA Turbine Pilot Magazine - June 2020 - 87
AOPA Turbine Pilot Magazine - June 2020 - 88
AOPA Turbine Pilot Magazine - June 2020 - 89
AOPA Turbine Pilot Magazine - June 2020 - 90
AOPA Turbine Pilot Magazine - June 2020 - 91
AOPA Turbine Pilot Magazine - June 2020 - 92
AOPA Turbine Pilot Magazine - June 2020 - 93
AOPA Turbine Pilot Magazine - June 2020 - 94
AOPA Turbine Pilot Magazine - June 2020 - 95
AOPA Turbine Pilot Magazine - June 2020 - 96
AOPA Turbine Pilot Magazine - June 2020 - 97
AOPA Turbine Pilot Magazine - June 2020 - 98
AOPA Turbine Pilot Magazine - June 2020 - 99
AOPA Turbine Pilot Magazine - June 2020 - 100
AOPA Turbine Pilot Magazine - June 2020 - 101
AOPA Turbine Pilot Magazine - June 2020 - 102
AOPA Turbine Pilot Magazine - June 2020 - 103
AOPA Turbine Pilot Magazine - June 2020 - 104
AOPA Turbine Pilot Magazine - June 2020 - 105
AOPA Turbine Pilot Magazine - June 2020 - 106
AOPA Turbine Pilot Magazine - June 2020 - 107
AOPA Turbine Pilot Magazine - June 2020 - 108
AOPA Turbine Pilot Magazine - June 2020 - 109
AOPA Turbine Pilot Magazine - June 2020 - 110
AOPA Turbine Pilot Magazine - June 2020 - 111
AOPA Turbine Pilot Magazine - June 2020 - 112
AOPA Turbine Pilot Magazine - June 2020 - Cover3
AOPA Turbine Pilot Magazine - June 2020 - Cover4
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