Fundamentals Flashcards
What is “g”?
Acceleration due to gravity
Which law is Newton’s law of inertia?
1st
What are the two forms of mechanical energy?
Potential energy
Kinetic energy
What is the unit and equation for kinetic energy?
Joules (J)
E=1/2mv^2
What is the working fluid of the gas turbine engine?
Air
What is heating at constant pressure called?
Isobaric heating
Which is the most fuel efficient engine at low altitude?
Turboprop
What is always required on a turboprop?
Reduction gearbox
What produces the most thrust on a turbo fan?
The fan
Turbofan engines are normally of what configuration?
Double or triple spool.
What type of construction are modern engines?
Turbofan
What types of engines were developed from the turbojet engine?
Turbofan
Turboprop
What qualities should engine materials have?
Light
Cheap
Strong enough for its task
What are the turbine blades made from?
Titanium
What is Newton’s 3rd law and what is it known as?
Every action has an equal and opposite reaction.
Law of action and reaction
What is Newton’s first law of motion?
An object is at rest or constant motion unless the forces acting upon it become unbalanced.
What is the unit and equation for force?
Newtons (N)
F=ma
What is the unit and equation for work?
Joules (J)
Work= force x distance
What is the unit and equation for power?
Watts (W)
Power= work/time
What is the unit and equation for potential energy?
Joules (J)
E=mgh
What does an engine provide for the aircraft?
Thrust
Hydraulics
Electrics
Pneumatics
What is the Brayton cycle for a gas turbine engine?
Compression
Combustion
Exhaust
What is the difference between the Brayton cycle and a reciprocating engine?
The Brayton cycle is happening all at once in a continuous motion and run of the engine, while the piston engine has to complete each stage individually.
How does a turboprop generate thrust?
Small acceleration of a large quantity of air.