ttkechcraft
Twin Engine (Piston)
Section X
Safety Information
Light Twin Engine Airplanes (AC61-9B). In particular,
observe carefully the warnings in the Practical Test Stan-
dards.
The single-engine stall speed of a twin-engine airplane is
generally slightly below the power off (engines idle) stall
speed, for a given weight condition. Single-engine stalls
should not be conducted in multi-engine airplanes by other
than qualified engineering test pilots.
Ymca
~
STALL
FIRST
SPEED
w
o
~
r-
H
t-
-.J
«
W
0:::
~
(fJ
(fJ
W
e:t:
0..
INDICATED
AIRSPEED
RELATIONSHIP
BETWEEN
STALL
SPEED
AND
Ymca
FOR
AIRCRAFT
WITH
NORMALLY
ASPIRATED
ENGINES.
C93THOOCOl04 C
Engine-outminimumcontrol speed generallydecreases with
altitude, while the single engine stall speed remainsapproxi-
mately constant for normally aspirated engines. No such
demonstration should be attempted when the altitude and
temperature are such that the engine-out minimum control
May, 1994
10·49
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