C.G.
Center of gravity or point within the length and
width of a vehicle about which all the vehicle weight is balanced.
C/O
Carryover
CA
Distance from back of cab to centerline of rear
axle.
CAB
The space in a locomotive "A" unit
containing the operating controls and providing shelter and seats for the
engine crew.
CAB CARD
Uniform Identification Cab Card in which the
various State operating authorities and permit stamps are affixed. Called bingo card by drivers.
CAB OVER ENGINE CHASSIS
A cab over chassis is very short compared to a
conventional or cab forward chassis.
From a side view the driver
position would be atop or forward of the entwine position and engine service is achieved by tilting
the cab to expose the engine.
CAB SIGNAL
1) A device located in the cab of the locomotive
which indicates the condition of the track ahead, whether clear or occupied, by
a display of signals. 2) When equipped with automatic train stop... when a cab
signal indication requires a speed reduction and the train is permitted to
proceed at a higher speed, an audible warning will sound. If the engineer does not respond within a
time limit by reducing power and making a service brake application, the train
will automatically stop.
CAB-ALONGSIDE-ENGINE
A tractor in which the cab is located alongside the
engine (abbreviated CAE). Same as
cab-beside-engine.
CAB-BEHIND-ENGINE
A tractor on which the cab is located behind the
engine a conventional cab.
CAB-BESIDE-ENGINE
Same as cab-alongside-engine (abbreviated CBE).
CABIN
An automotive interior compartment.
CABOOSE
A car which is attached to the rear of freight
train for the accommodation of the conductor and trainmen as office and
quarters while in transit. Sometimes
called cabin car, way car, hack, shanty, or crummy.
CAD
Computer Aided Drafting (or Drawing)
CAFE RACER
A motorcycle with a high performance output and a
aerodynamically designed chassis for road racing.
CALIPER
A caliper as applied to disc brakes is the non rotational component of a disc
brake that straddles the disc and contains the hydraulic components that force
the frictional material against the brake disc.
CALL STATION
A person or company that agrees to transact
business for a trucking company in a given location, generally a location where
terminal facilities are not ,justified.
Call station handles calls from shippers but usually performs no freight
handling function. See agent
CALLER
An employee who notifies train and engine crews and
other employee to report for duty.
CAM DIE
A means of translating the normal vertical motion
of a die into horizontal or angular motion through the use of wedges.
CAMBER
Camber is the angle between the plane of the tire
and true vertical.
CAMBER ANGLE
The inclination of the wheel plane to the vertical.
It is considered positive when the wheel leans outward at the top and negative
when it leans inward.
CAMEL BACK BODY
Truck body with floor curving downward at the rear.
CAMERA-CASE
A textured, leather-like finish used in car
interiors, as on a glove box door. The name is derived from the dark-grained
leather used on expensive cameras.
"CAN'T MAKE" NOTIFICATION
A "Can't Make" Notification is initiated
by Preproduction Planning and Control (BAO) for any part(s) released by
Engineering which will not be available for the desired effective point (Job
No. 1, mandated date or added starter) at the Assembly plant or to support
required functional or training builds. This form is sent to Engineering for
direction as to substitution, rework or omission for the specified units or for
the authorization of premium funds for tooling, overtime or transportation to
support the desired effective points.
The Program Timing activity routes the "Can't Make" to the
affected Engineering Supervisor for response and follows the response to assure
promptness (48-hour response requirement) and appropriateness of direction and
obtains Executive approval and concurrence of the "Timing" Manager,
finally providing expedient delivery to BAO Preproduction.
CAPACITY (freight car)
The normal load in pounds, cubic feet in gallons,
which the car is designed to carry.
These figures are stenciled on the sides of cars.
CAPS
Cost per Average Pound Saved
CAR
Every motor vehicle, except motorcycle and motor
driven cycles, designed for carrying 10 passengers or less and used for the
transportation or persons.
CAR DISTRIBUTOR
A individual who is assigned the responsibility of
distributing empty freight cars.
CAR DUMPER
A device for quick unloading of bulk material such
as coal or grain. After being clasped
to the rail the car is tilted or rolled to discharge the lading.
CAR FLOAT
A large flat-bottom boat equipped with tracks on
which railroad cars are moved in inland waterways.
CAR KNOCKER
(slang) Car
inspector.
CAR LINE
A name denoting a family of vehicles within a make
which has a degree of commonalty in construction such as body, chassis, etc.
CAR LINING
Material placed on the walls of a car for the
protection of goods.
CAR MILE
The movement of a car the distance of one
mile. A term used in statistical data.
CAR STOP
A device for stopping motion of a car by engaging
the wheels, as distinguished from a bumping post which arrests motion upon
contact with the coupler of a car. See
bumping post.
CARBON MONOXIDE (C0)
A colorless, odorless, highly poisonous gas,
produced by the incomplete combustion of fuel.
It is usually expelled by the exhaust system.
CARBURETOR
That part of the gas engine fuel system where
gasoline and air are mixed in controlled proportions.
CARD BOARD
A small board secured to the outside of a freight
car, on which are tacked cards giving shipping directions or warning of
dangerous lading etc.
CARD RACK
A small receptacle on the outside of a freight car
to receive cards giving shipping directions.
CARDAN UNIVERSAL JOINT
A non-constant universal joint consisting of two
yokes joined by a cross.
CARGO
The freight carried by a vehicle.
CARGO BARRIER
The panel between the luggage compartment and the
passenger compartment at the rear of the rear seat.
CARLOAD
The quantity of freight required for the
application of a carload rate.
CARLOAD RATE
A rate applicable to a car load quantity of
freight.
CARRIER
See motor carrier.
CARRIER'S LIEN
Right of a motor carrier to retain property which
ft has transported as security for the collect freight charges.
CARRYING TRUCK
Used for the transportation of the completely
welded body through subsequent operations, metal finish, paint and trim.
CARTAGE
The charge made for hauling freight.
CARTAGE ALLOWANCE:
See allowance.
CASE
A shell used to hold molds in their proper
alignment.
CASE HARDEN
Hardening of outer layer of an iron-base alloy
through heat treatment.
CASING
The tire structure, excepting tread and sidewall
rubber.
CAST WHEEL
A casting that includes the hub and spokes at the
end of which are studs, clamps and nuts that are used to support the rim.
CASTER
Amount of tilt in fore and aft axis of axle beam.
CASTER
Forward (or rearward) inclination of kingpin or
support arm of wheel ; amount of tilt in axle beam.
CASTER ANGLE
The angle in side elevation between the steering
axis and the vertical. It is considered
positive when the steering axis is inclined rearward (in the upward direction)
and negative when the steering axis is inclined forward.
CASTER OFFSET
The distance in side elevation between the point
where the steering axis intersects the ground, and the center of tire
contact. The offset is considered
positive when the intersection point is forward of the tire contact center and
negative when it is rearward.
CASTING
The shape formed by pouring or spraying a plastic
or liquid substance into a mold and letting the material harden. Also used to
describe the process itself.
CATENARY
A system of wires suspended between poles and
bridges supporting over contact wires normally energized at 11,000 volts.
CATERPILLAR ELECTRONIC TECHNICIAN (CAT ET)
A diagnostic tool software program for a personal computer (PC). Designed to replace the ECAP service tool for Caterpillar diesel engines. (CAT)
The acronym for Caterpillar Electronic Technician Software. (CAT)
CATWALK
A depressed surface, usually between a fender and a
raised area of the hood or deck.
CAUSE
The combination of simultaneous and sequential
factors without any one of which the result could not have occurred. The result might be a motor-vehicle traffic
accident, or a successful trip.
CAUSE ANALYSIS
The effort to determine from whatever information
is available, including results of accident reconstruction, why the accident
occurred, that is, the complete combination of circumstances that caused the
highway transportation system to break down at the time and place of the
accident. Cause analysis has been
referred to as determining "indirect" or "condition"
causes. Level 5 of accident
investigation.
CCO
Climate Control Operations
CD
1) Master locating coordination drawing. 2) Casting
Division
CEMENT
See Portland cement concrete.
CENTER DUMP CAR
A car which will discharge its entire load between
the rails, or wheels.
CENTER LINE
The plane passing through the center of a
headlight, wheel or the vehicle itself.
CENTER OF GRAVITY
That point at
which the entire weight of an object
may be considered concentrated; that is, the line of action of the
body's weight passes through the center of gravity.
CENTER OF MASS
The single point within a body that responds
and is displaced in the same manner as
a point mass would respond and be displaced when subjected to the same external forces. The force (f) is the product of the mass (m)
and the acceleration (Acm) of the center of mass. Due to the uniform gravitational acceleration (g) acting on the
body, the center of mass and the center of gravity coincide.
CENTER OF PARALLEL WHEEL MOTION
The center of curvature of the path along which
each of a pair of wheel centers moves in a longitudinal vertical plane relative
to the sprung mass when both wheels are equally displaced.
CENTER OF TIRE CONTACT
The intersection of the wheel plane and the
vertical projection of the spin axis of the wheel onto the road plane.
CENTER PILLAR
Box construction used on four-door bodies forming
the front door body lock pillar and rear door body hinge pillar.
CENTER PIN OR KING BOLT
A large bolt which passes through the center plates
on the body bolster and truck bolster.
The truck turns about the bolt, but the stress is taken by the center
plates. It is, therefore, a mere pin
and not a bolt in the usual sense.
CENTER PLATE
One of a pair of plates which fit one onto the
other and which support the car body on the trucks, allowing them to turn
freely under the car. The center pin or
King bolt passes through both, but does not really serve as a pivot. The male or body center plate is attached to
the under side of the body bolster. The
female or truck center plate is attached to the top side of the truck bolster.
CENTER SILL
The center longitudinal member of the under frame
of a car which forms, as it were, the back bone of the under frame and
transmits most of the buffing shocks, from one end of the car to the
other. Freight with cushioned under
frames use a special type of floating center sill construction. See cushion under frame.
CENTERED FORCE
A centered force is directed through the center of
gravity of a vehicle. The term refers
to forces generated by ú collision.
CENTERED THRUST
A force directed toward the center of a mass of the
vehicle or other object in collision.
CENTIMETER (CM)
A metric measuring unit equal to approximately
0.390 inches.
CENTRAL COLLISION
A collision between two vehicles or ú vehicle and a fixed object in which the principle force is directed
essentially through the centers of mass of the involved vehicles.
CENTRIFUGAL CASTER
The unbalance moment about the steering axis
produced by a lateral acceleration equal to gravity acting at the combined
center of gravity of all the steerable parts.
It is considered positive if the combined center of gravity is forward
of the steering axis and negative if rearward of the steering axis.
CENTRIFUGAL FORCE
The force of a body in motion which tends to keep
it continuing in the same direction rather than following a curved path.
CENTRIFUGAL SKID MARK
See yaw mark.
Centrifugal Skid is a tire mark left by a rotating wheel that is
slipping sideways parallel to its axle.
The skid mark can vary in width from narrow band to a wide mark
depending on the attitude of the vehicle.
The skid mark will normally have striation marks perpendicular or
oblique to the direction of the mark and can be left by one or more tires and
will always be in a curve or arc. Also
referred to as yaw mark, critical speed scuffs ant side slip marks.
CENTRIPETAL ACCELERATION
Centripetal acceleration is an acceleration toward
the center of a circle. It is present whenever an object (or vehicle) proceeds
along a circular path. If an object
proceeds along a curved path which is not a circle there exists the same
centripetal acceleration that would be present if the body were moving on the
circle which best fits the curve. Chain
binders A device used to remove slack
from chains used to tie down loads.
CEO
Chassis Engineering Office
CERTIFICATE OF PUBLIC CONVENIENCE AND NECESSITY
Authority or certificate granted by the Interstate
Commerce Commission to common carriers by railroad, motor vehicle, and water to
operate in interstate commerce.
CERTIFICATE OF WEIGHT
An
authoritative statement of the weight of a shipment prepared by a weigh master.
CETANE NUMBER
Rating applied to ignition properties of diesel
fuel the higher the number, the better
the ignition quality. See octane
number.
CHAIN - REACTION ACCIDENT
A series of two or more traffic accidents occurring
one after another in the same vicinity in such a manner that, after one
accident has reached a stabilized accident situation, its results contribute to
the occurrence of a subsequent traffic accident. If there is no clear indication that a stabilized accident
situation is reached, the series of
events is considered to be a single accident, although possibly a multi unit
accident.
CHAIN DRIVE
Rear axle driven by means of chain belt.
CHAMFER
A flat surface beveled or angled off from an
adjacent surface.
CHANGE IN VELOCITY
One way if describing the severity of a collision
is to assess the change in velocity which occurs. Two cars of equal weight each traveling at 30 m.p.h. having a
head-on collision will each have a change in velocity (delta V) of 30 m.p.h.,
ignoring any small amount of rebound which may occur. Similarly, a car hitting a rigid barrier at 30 m.p.h. will have a
change in velocity of 30 m.p.h., if rebound is ignored. Change in velocity can also be used as an
assessment of the severity of a blow to the human frame. Thus contracts by occupants in a frontal
collision can be analyzed in terms of localized changes in velocity separately
for the head, the chest and the knees making specific contacts with various
interior structures.
CHANNEL ROCKER
Frame-body design where the chassis frame fits
inside of an open rocker panel.
CHARACTER LINE
A line on the basic shape, resulting in an
intersection of planes and sometimes ornamented.
CHARACTERISTIC SPEED
That forward speed for an understeer vehicle at
which the steering sensitivity at zero lateral acceleration trim is one-half
the steering sensitivity of a neutral steer vehicle.
CHARGE AIR COOLING
The cooling of engine intake air after compression
by turbocharger.
CHARGE IT
(Slang)
Allow compressed air to flow into semi-trailer lines.
CHASING
Steering a tractor while backing so as to cause the
tractor to follow (i.e.; "chase") along the path of the trailer.
Combines with "jacking" to allow the trailer to be maneuvered along
the prescribed path. See ,jacking.
CHASSIS
The under part of
an automobile, consisting of the frame with axles, brakes, wheels,
engine, transmission driveline and exhaust system.
CHASSIS COMPONENT AND BODY PACKAGE LAYOUTS
Layouts which identify package constraints and
depict chassis components in their proposed environments. (This is the control
point for Mechanical Prototype availability.) Chassis drawn to LH side; body
drawn to RH side.
CHEAT
To exaggerate an element in a drawing or rendering.
CHECK A BLOCK
Seal totally squashed and door doesn't close.
CHECK VALVE
Device to automatically isolate one part of air
brake system from another. A one-way
check valve provides free air flow in one direction only. A two-way check valve permits actuation of
the brake system by either of two brake application valves
CHECKING FIXTURE
A tool used to qualify the accuracy of a production
stamping. Also used extensively in die tryout to indicate necessary tool
corrections.
CHEST LOADS
The accelerative forces (measured in
"G's" or "S.I.") which are applied to the center of gravity
of the upper thorax.
CHILD CAR SEAT
A portable seat placed in a vehicle to provide
restraint for small children and infants.
CHIP
A short, deep gouge; a hole in pavement made by a
strong, sharp, pointed metal object under great pressure, usually without
striations.
CHMSL
Center High Mounted Stop Light
CHOP
A broad, shallow gouge, even and regular on the
deeper side and terminating in scratches and striations on the opposite,
shallower side; a depression in pavement made by strong, sharp metal edge
moving sidewise under heavy pressure.
CHOPPER
A customized motorcycle in which the front wheel
has been "chopped off" and extended forward.
CHORD
(c): A line drawn between two points on the
circumference of a circle. A chord is
never greater than the diameter of a circle of which the arc is a part.
CIRCUIT (ELECTRICAL)
A path through which electrical current can
flow. A closed circuit provides a continuous,
unbroken path from a current source through various current consuming devices
back to the source (or a common ground;).
An open circuit occurs when the current path is interrupted or broken
either by an open switch or relay or by a broken wire or loose connection. A short circuit occurs when a damaged or
loose wire accidentally touches another damaged wire or some other conductive
material. Current then takes a "short
cut" to ground, bypassing part of its normal path. See grounded circuit,
CIRCUIT BREAKER
A device that automatically interrupts the flow of
an electric current when the current becomes excessive.
CIRCUITOUS ROUTE
An indirect route.
CIRCUS LOADING
A means of loading highway trailers by moving them
over the ends of the cars.
CKD
Completely Knocked down, or disassembled.
CLADDING
Large injection molded, plastic part attached to
lower section of door for protection and design.
CLAIM
(1) A demand for payment to compensate for freight
damage that is supposed to have occurred while the cargo was in the hands of
the carrier (2) A demand for refund of
an overcharge. See overcharge.
CLAIM AGENT
An employee who adjusts or settles claims made
against his company.
CLAIM TRACER
A request for information concerning the status of
a claim.
CLAIMANT
Person or company filing a claim.
CLAMSHELL TAILGATE
Refers to the station wagon tailgate design where
gate slides into the underbody and backlight slides into roof for access to the
cargo area.
CLASS A
Show surface.
CLASS B
Exposed when door opens.
CLASS C
Totally hidden.
CLASS I MOTOR CARRIERS
Carriers having average gross operating revenues
(including interstate and intrastate) of 55 million or more per year.
CLASS II MOTOR CARRIERS
Carriers having average gross operas trig revenues
(including interstate and intrastate) between $ 1 to $ 5 million per year.
CLASS III MOTOR CARRIERS
Carriers having average annual gross operating
revenues (including interstate and intrastate) of less than $ l million per
year.
CLASSIFICATION (FREIGHT)
A publication containing a list of articles and the
classes to which they are assigned for the purpose of applying class rates
together with governing rules and regulations.
CLASSIFICATION RATING
The class to which an article of freight is
assigned for the purpose of applying class rates.
CLASSIFICATION YARD
A yard where cars are grouped according the their
destinations and made ready for proper train movement.
CLAY APPROVAL
Approval by the Vice-President of the affected
Vehicle Group, of the visible attributes of the proposed vehicle. This is
accomplished by viewing physical properties, normally constructed in clay and
built in the Design Center (Styling). (Normally 24 months prior to Job #1.)
CLAY BUCK
Same as armature.
CLAY SQUEEZE
An impression made by forcing soft clay on an
object.
CLEAN BILL OF LADING
A bill of lading signed by the carrier for receipt
of merchandise in good condition (no damage, loss, etc. apparent), and which
does not bear such notation as "shipper's load and count."
CLEAN BORE TANK
A single tank without compartments inside.
CLEAR RECORD
A record which shows that a shipment was handled
without loss as damage.
CLEARANCE LIGHTS
The small lights that outline a vehicle's length
and breadth. The lamps at the front and
sides are amber those visible from the rear are red. Also called marker or running lights. Also see identification lights.
Required by the FMCSR. on vehicles 8O inches or more in width.
CLEARANCE OR CLEARANCE LIMIT
The limiting dimensions of height and width for
cars in order that they may safely clear all bridges, tunnels, station
platforms and other structures as well as equipment on adjacent tracks.
CLEARING HOUSE
An organization set up to process and collect bills
for participating trucking companies.
CLEAT
A strip of wood or metal used for additional
strength to prevent warping or to hold something in position.
CLO
Centerline of Occupant.
CLOCKWISE
Rotation in the same direction as the hands of a
clock.
CLOSING VELOCITY
The velocity of approach of two vehicles (measured
at each center of gravity) taken along a line between the centers at initial
contact.
CLUTCH
The part of the power train that allows the driver
to connect the engine to the wheels.
CLUTCH
Switch on the clutch pedal that disables cruise control when the clutch is applied. ( Detroit )
CMVSS
Canadian Motor Vehicle Safety Standards
COACH JOINT
The butting of two pieces of metal, welding or
bolting to right-angle flanges.
COAL CAR
A car for carrying coal, usually a hopper car.
Coasting
Driving Time when the engine is disengaged from the vehicle ( Detroit )
Coasting Percentage
Coasting Time divided by Driving Time ( Detroit )
Coasting Time
The condition when Vehicle Speed is greater than 40 mph and Engine Speed is less than 40% of maximum rated RPM. ( Detroit )
COBBLED
Production car with experimental or design
components added or substituted. Often used to describe a component or model
put together quickly.
COD
See collect shipment.
CODE X BODY
A partial vehicle assembled of major body panels,
mechanically joined and certified to be within design tolerances. The assembly
is generally in a "blue-buck" mode with body design "grid"
lines scribed on the surface sheet metal to aid in controlling the assembly
accuracy. The Code X assembly is used to check the vehicle design and its
assembly feasibility.
COEFFICIENT OF FRICTION
(dynamic):
A number representing the resistance to sliding of two surfaces in
contact; the drag factor of a vehicle or other object sliding on a roadway or
other surface which is level; the force parallel to a surface required to keep
in motion an object sliding on that surface, divided by the force of the object
against that surface; measured in pounds per pound; often designated by the
Greek letter Mu.
COEFFICIENT OF KINETIC FRICTION
(uk):
Defined as the friction force (f) divided by the normal force (y) of one
surface sliding across another at a constant speed.
COEFFICIENT OF RESTITUTION
The coefficient of restitution is a measure of the
degree to which the total kinetic energy of two vehicles in a collusion is
dissipated by the collision; The ratio of
the rebound velocity to the impact velocity of two objects and measures the
amount of bounce. When two cars collide
they may bounce apart with no deformation (coefficient = 1.0) or they may
deform to a given extent (coefficient § 1).
The difference between the dynamic crush and static crush COR = [DYN CR
- STA CR]. The measured values are
typically between 10 and 20 percent.
COEFFICIENT OF STATIC FRICTION
(us):
Defined as the critical friction force (fc) divided by the normal force
(y), where fc is the friction force
when the object is on the verge of sliding.
COIL SPRING
Spring stock coiled in cylindrical form.
COKE BOTTLE
A double swell in the plan view contour. Looking
directly down on a car, the body is narrower in the middle section than over
the front and rear wheels.
COKE RACK
A slatted frame or box applied above the sides and
ends of gondola or hopper cars to increase the cubic capacity for the purpose
of carrying coke or other freight in which the bulk is large relative to the
weight.
COLD DEVELOPMENT
The development of a pattern blank by unfolding
flanged and warped surfaces using paper, tape and the wood model.
COLLECT SHIPMENT
A shipment where collection of freight charges and
advances are made by the delivering carrier upon delivery. Abbreviated as cod and commonly called COD
by truckers.
COLLINEAR COLLISION
A collision between two objects in which their
respective directions of travel are parallel to one another.
COLLISION
The coming together of two bodies resulting in an
abrupt change in motion of at least one of the bodies.
COLLISION COURSE
Motion of a traffic unit or other object which, if
continued without modification, will result in collision with another traffic
unit or other object. Objects are on a
collision course if the space between them is diminishing and the angle between
the path of either an a line between them is consistent.
COLLISION SCRUB
Skid marks-left by wheels momentarily kept from
rotating by forces of collision. The
marks are usually not more than 10 feet in length in same direction collisions
they tend to belong and straight. In
opposite direction collisions they are likely to be short and curved. They indicate the movement of the tire on
the road during encasement (impact) between the vehicle and some other object.
COLLISIONS - ELASTIC
A central collision between two bodies in which no
permanent deformation takes place and both momentum and kinetic energy are
conserved.
COLLISIONS - INELASTIC
A central collision between two bodies in which
there is permanent deformation.
Momentum is conserved kinetic
energy is not.
COLUMN PRESS
An upright press open at the front and back with
straight sides at the ends of the bed.
COMBINATION
Truck coupled to one or more trailers.
COMBINATION RATE
A freight rate made through rates by combining two
or more rates published in different tariffs.
COMBINATION THROUGH RATE
A through rate made by combining two or more rates
published in different tariffs.
COMBINATION VEHICLE
A truck or truck-tractor coupled to one or ,more
trailers, also referred to as a "rig." See rig.
COMBINED VELOCITY
(vc): The
result of integrating the velocities of a
series of events to obtain the starting or initial velocity.
COMBUSTIBLE
Able to catch fire and burn easily.
COMBUSTION
Burning.
COMMODITY
Any article of commerce. Goods shipped.
COMMODITY, EXEMPT
One that may be transported in interstate commerce
without operating authority or published rates.
COMMON CARRIER
A transportation business that offers service to
the general public. Interstate common
carriers must hold a franchise issued by the Interstate Commerce
Commission. This franchise limits
service to a specific geographical area.
Rates also are regulated. Routes
and schedules of regular common carriers are regulated by government agencies,
but irregular route common carriers may set their own without regulatory
approval. Most states also regulate
common carriers.
COMMON CENTER OF MASS
In any collision the common center of mass is
unaffected by the collision. The common center of mass will still be moving at
the same speed and direction after collision as it hat prior to collision.
COMMON VELOCITY
That velocity achieved by some point on both
vehicles at some time during the impact, often referred to as the velocity
achieved by both vehicles when both centers of mass are moving at the same
velocity.
COMPANION FLANGE
Circular flanged plate connecting driveshaft with
transmission or axle.
COMPARTMENT TANK CAR
A tank car with the tank body divided into several
sections for the purpose of carrying different commodities in each compartment
or smaller shipments.
COMPARTMENTIZER CAR
A box car equipped with moveable bulkheads which
can be used to divide the car into separate compartments.
COMPATIBILITY
The characteristic of a particular motor vehicle
which determines the degree to which protection is achieved for occupants in
that vehicle and for occupants in all other vehicles with which that vehicle
may collide, and for pedestrians and cyclist which may collide with that
vehicle.
COMPLETE COLLISION
A complete collision occurs when motion momentarily
ceases between some areas of the colliding objects while they are in contact
with one another.
COMPLEX DAMPING
Damping in which the force opposing the vibratory
motion is variable, but not proportional to the velocity.
COMPLEX REACTION
A choice between two or more possible reactions to
an unexpected hazard.
COMPLEX REACTION TIME
Complex reaction time is that reaction time
determined in cases where there are multiple stimuli each with its own
response. In these multiple choice
situations, where the stimulus may be simple but the number of choices is great
the reaction time increases with the number of choices. Complex reaction time is also known as
disjunctive reaction time.
COMPLEXITY
Complexity, as used in BEPE, refers to the number
of BAO-Assembly end items (including major parts and standard parts) that are
required to build Vehicle Line-up; the effect of color components is
incorporated. Complexity estimates are initially obtained from detailed
analysis of Redbook assumptions and are later modified by Product/Engineering Letter
program actions.
COMPLIANCE CHAMBER
The camber motion of a wheel resulting from
compliance in suspension linkages and produced by forces and/or moments applied
at the tire-road contact.
COMPLIANCE CHAMBER COEFFICIENT
The rate of change in wheel inclination angle with
respect to change in forces or moments applied at the tire-road contact.
COMPLIANCE STEER
The change in steer angle of front or rear wheels
resulting from compliance in suspension and steering linkages and produced by
forces and/or moments applied at the tire-road contact.
COMPLIANCE STEER COEFFICIENT
The rate of change in compliance steer with respect
to change in forces or moments applied at the tire-road contact.
COMPLIANCE UNDERSTEER
Compliance steer which increases vehicle understeer
or increases vehicle oversteer.
COMPONENT
A single-function unit, such as a transmission.
COMPONENT DESIGN
Is the activity having responsibility for, but not
limited to, the design of specific single components; this includes the
responsibility for materials, cost, weight, reliability, durability, function,
appearance, serviceability and ease of manufacture, consistent with pertinent
specifications and timing and financial objectives.
COMPONENT TEST VEHICLE
Is basically current production, revised, modified,
or reworked in certain areas to incorporate on e or more components which are
the design responsibility of the "PEO" initiating the test. These are
intended for initial testing and development on advance programs prior to
design and procurement of complete mating parts.
COMPOSITE DEVELOPMEN