Sphaera Training Systems Logo

eLearning | Computer Based Training | Systems Simulation

Sphaera Training Systems Logo

eLearning | Computer Based Training | Systems Simulation





Gas Turbine Engine Altitude Trainer

For Understanding the Effect of Altitude and Airspeed on Engine Performance

The Effect of Altitude and Airspeed

As the thrust of a gas turbine is dependent on the mass of air entering the engine, the performance of the engine is affected by factors that inlcude airspeed and altitude:

As altitude increases, the reducing air density results in a reduction of thrust.

As airspeed increases, the effect at low speed is to reduce thrust. However, at higher speeds thrust will begin to increase (due to the increased ram pressure from the forward motion of the aircraft as it pushes its way through the air).           .


Engine altitude trainer showing effect of altitude and airpseed on engine performance

The Engine Altitude Trainer is an ideal interactive CBT classroom training aid for enabling instructors to demonstrate the effect that aircraft altitude and airspeed (velocity) has on gas turbine engine performance.

With total control over altitude and airspeed, the user can observe how any changes affect the following:

  • Static air pressure
  • Gross thrust
  • Net thrust
  • Mass airflow
  • Fuel flow (and fuel consumption)
  • Velocity of the gas flow (gas inlet velocity and gas outlet velocity)

EGT gauge and thermocouple harness

The engine temperature trainer provides an EGT (exhaust gas temperature) gauge that receives its input from an interactive schematic diagram of a thermocouple harness.

N1 gauge and tachometer system

The engine speed trainer provides both N1 and N2 gauges that receive input from a tachometer system (with tachogenerator) or a pulse probe system (with phonic wheel).

Float actuated fuel contents gauge CBT

The fuel contents trainer provides 3 of the most common types of aircraft fuel gauging systems used on aircraft: Float actuated, reed switch and capacitive systems.