Aircraft Systems and Performance Flashcards

What does a gyroscopic instrument's 'precession' error cause in turns?

Answer: The attitude indicator may show a slight bank even when wings are level after a coordinated turn

Gyroscopic precession can cause the attitude indicator to display a slight bank error after prolonged or steep turns, requiring occasional re-centering.

In a standard atmosphere, what is the approximate temperature lapse rate per 1,000 feet of altitude gain?

Answer: 2°C (3.5°F)

The standard atmosphere lapse rate is approximately 2°C (or 3.5°F) per 1,000 feet up to the tropopause.

What is the primary purpose of an aircraft's oil system?

Answer: To lubricate, cool, and clean internal engine components

The oil system lubricates moving parts, helps cool the engine, and carries away contaminants and metal particles.

What is 'ground effect' and how does it affect takeoff performance?

Answer: Increased lift and reduced induced drag close to the ground, allowing liftoff at lower speeds

Ground effect occurs within about one wingspan of the surface; it reduces induced drag and increases lift, allowing the aircraft to become airborne at lower speeds.

What information does a tachometer provide to a pilot?

Answer: Engine rotational speed in revolutions per minute (RPM)

The tachometer measures and displays crankshaft rotational speed in RPM, helping the pilot set the correct power for each phase of flight.

What does a positive load factor greater than 1G mean for an aircraft?

Answer: The wings must produce lift greater than the aircraft's weight

A load factor above 1G means the wings must generate lift exceeding the aircraft's weight, which occurs in turns, pull-ups, and turbulence.

What is the result of leaning the mixture too aggressively at low altitude?

Answer: Engine roughness, loss of power, and possible detonation

An excessively lean mixture can cause rough running, power loss, and dangerously high cylinder temperatures that may lead to detonation.