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106
Function Keys
Example: In a rather overoptimistic
effort to break the speed of sound, high-
flying pilot Ike Daedalus cranks open
the throttle on his surplus Hawker
Siddeley Harrier aircraft. From his
instruments he reads a pressure altitude
(PALT) of 25,500 feet with a calibrat-
ed airspeed (CAS) of 350 knots. What
is the flight mach number
speed of aircraft
M =
speed of sound
if the following formula is applicable?
STe73]
Method: The mostefficient place to begin work on this problem is at
the innermost set of brackets. So begin by solving for the quantity
2
[
350
]
and proceed outward from there.
661.5
Press
Display
350
661.5 €
a
Square of bracketed
quantity.
208
1
350
18
Contents of left-hand set
of brackets are in the
stack.
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