Definitions
RESTRICTED
DEFINITIONS
(1) Trajectory
(2) Gravity
The name given to the path the bomb follows
through
mass from the point of release
the point of impact is known as
trajectory.
The force
exerted by the
earth, tending to
pull anything to
its surface.
(3) Altimeter
(4) True
Altitude
(5) C.I.A.S.
(6) True Air-
Speed
(7) Ground
Speed
(8)
Time
of Fall
An instrument
used in airplanes to find the
linear vertical
distance
In teet that a plane
is
above sea
leve!.
This instrument reg!
decreasing barometric pressure,
compute: in feet,
that occurs
when rising above sea leve!.
it des
not give the
true altitude in feet
plane is above the ground unless the ground is at
sea level.
The linear vertical distance that the air-
plane is flying above
the ground.
This distance
may be
found by subtracting the known altitude
of
reter in the airplane.
EXAMPLE:
If the altimeter
in the airdlane
reads 10,000 feet and
the ground
over which
the plane is flying were 4000 feet
above sea level,
the true altitude would be 10,000
feet or 6000 feet.
"Calibrated indicated Air Speed" is
the air
speed reading
the air
speed indicator in the airplane corrected
for in-
stallation and
mechanical
errors.
"True Air Speed" is computed by correcting
the C.l.A.S.
for the change in air density which
occurs at any altitude above sea level.
"Ground Speed" is the speed at which the air
over the
ground.
It is com-
or subtracting wind effect from
adding
speed.
Time of Fall" is the time it takes for the
bomb to fall to earth
from
the time of release to
time of
impact.
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