Piper ARCHER III Pilot Operating Handbook page 34

SECTION 1
GENERAL
1.23 SYMBOLS, ABBREVIATIONS AND TERMINOLOGY (continued)
VNE/MNE
VNO
Vs
Vso
Vx
VY
(b) Meteorological Terminology
ISA
OAT
REPORT: VB-2749
1-10
PA-28-181, ARCHER
Never Exceed Speed or Mach Number is the •
speed limit that may not be exceeded al any
time.
Maximum Structural Cruising Speed is the
speed that should not be exceeded except in
smooth air and then only with caution.
Stalling Speed or the minimum steady flight
speed at which the airplane is controllable.
Stalling Speed or the minimum steady flight
speed at which the airplane is controllable in
the landing configuration.
Best Angle-of-Climb Speed is the airspeed
which delivers the greatest gain of altitude in
the shortest possible horizontal distance.
Best Rate-of-Climb Speed is the airspeed
which delivers the greatest gain in altitude in •
the shortest possible time.
International Standard Atmosphere in which:
The air is a dry perfect gas; The temperature
°
at sea level is 15 Celsius (59
The pressure at sea level is 29.92 inches
Hg (1013.2 mb); The temperature gradient
from sea level to the altitude at which
the temperature is -56.5
-0.00I98C (-0.003564
above that altitude.
Outside Air Temperature is the free air
static temperature, obtained either from
inflight temperature indications or ground
meteorological sources, adjusted for •
instrument error and compressibility effects.
ISSUED: December 22, 2017
Ill
°
Fahrenheit);
° C ( -69.7 °
F) is
v 1'') per foot and zero