Vernatherm Valve
Viscosity
A thermostatic valve used to divert oil through or around the oil cooler,
as necessary, to maintain oil temperature within desired limits.
The characteristic of a liquid to resist flowing. Regarding oil, high
viscosity refers to thicker or "heavier" oil while low viscosity oil is
thinner.
Relative viscosity is indicated by the specified "weight" of the
oil such as 30 "weight" or 50 "weight." Some oils are specified as
multiple-viscosity such as
10W30. In such cases, this oil is more stable
and resists the tendency to thin when heated or thicken when it becomes
cold.
Volatility
The tendency of a liquid to vaporize.
Volumetric Efficiency
The ability of an engine to fill its cylinders with air compared to their
capacity for air under static conditions.
A
"naturally aspirated" engine
will always have a volumetric efficiency of slightly less than
100%,
whereas superchargers permit volumetric efficiencies in excess of 100%.
Wastegate Valve A unit, used on turbocharged engines, to divert exhaust gas through or
around the turbine, as necessary to maintain turbine speed. As more air
is demanded by the engine,
due to throttle operation, the compressor
must work harder. In order to maintain compressor and turbine speeds,
more exhaust must be flowed through the turbine. The wastegate valve
closes and causes gas, which would go directly overboard, to pass through
the turbine. The wastegate is usually operated by an actuator which gets
necessary signals from the turbocharger controller.
DEFINITION OF TERMS
Front, rear, left, and right, as used in this manual, refer to the engine as viewed by the
mechanic in a normal position, facing the accessory end. Accessory end being the rear and
propeller flange being the front of the engine. Cylinders are numbered starting from the rear,
with odd numbers on the right and even numbers on the left.
1-10-03
DESCRIPTION OF ENGINE MODEL CODE
DETAILED ENGINE DESCRIPTION
Example:
Prefix Specification Number
TS- Turbosupercharged
I- Fuel Injection
0-
Horizontally Opposed
Cylinder Configuration
Displacement
\
Refer to specification Manual
X30508A for information
Suffix
-
The MB Letter Identifies
The Model of Engine
360 Cubic
Inch Cylinder
Volume Displacement
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