YOUTUBE Flashcards
An aircraft engine classified as?
Heat Engine
1 BTU = ?
778 ft. lbs of work
33,000 ft lbs / min = ?
1 Horse Power (H.P.)
12 gal fuel burned / hr = ?
565 Horse Power
Aircraft Engine:
12 gal fuel burned / hr = ?
130 HP at 24% effieciency
Number of lbs fuel burned / hr to produce 1 brake HP = ?
Brake Specific Fuel Consumption / BSFC
determines the efficiency of engine operation.
Proper Fuel Metering
used to monitor engine behavior in flight.
Aircraft Instruments
What are the aircraft instruments:
Tachometer
Manifold Pressure Gauge
Exhaust Gas Temperature Indicator
provides an indication of the number of power strokes the engine is producing each minute.
Tachometer
indicates the pressure of the air forcing the combustible charge into the cylinders.
Manifold Pressure Gauge
lower the air density.
Altitude and High Humidity
Some of the power lost of this decrease in air density maybe regained simply by using a (?) to compress to the air before it enters the engine.
SUPERCHARGER
cause a light power loss from the back pressures created from the turbine.
TURBOCHARGERS
is determined by thr air presaure and compression ratio.
Final Pressure w/in Cylinder
increases efficiency and power.
HIGHER PRESSURE
When the critical pressure and temperature of fuel is reached, the fuel released its remaining energy instantaneously explodind rather than burning evenly, this explosion is called (?).
DETONATION
Detonation prevented by:
- Maintaining proper Manifold Pressure and RPM relationship
- Rich Fuel-Air Mixture
is a special blend of hydrocarbon fuel that contains additives to inhibits corrosion, improver storage capability, increase resistance into detonation.
AVIATION GASOLINE
OR AVGAS
A (?) added to the fuel to identify its anti detonation rating.
DYE
3 Grades of Aviation Gasoline
GRADE 80 - RED
GRADE 100 - GREEN
LOW LEAD 100 - BLUE
The difference is this fuels primarily the amount of the additive (?) which is used to suppress the detonation.
TETRAETHYL LEAD
has a maximum of 1/2 mL of te L/gal and is dyed red.
GRADE 80
is used for engines with low compression ratios and low power grade.
GRADE 80 FUEL
ia dyed green with as much as 4.6 mL of te L/gal added.
GRADE 100 FUEL
-for use in higher powered engines.
-high compression ratios.
GRADE 100 FUEL
a comprised fuel with the same anti detonation rating as the grade 100 but with only 2ml of te L/gal.
LOW LED-100 FUEL
is dyed blue.
LOW LED-100 FUEL
Never use fuel with a (?) than that approved for the engine.
LOWER RATING