ATPL from Pilot Assessments Flashcards
Line of Sight formula
ATPL Radio Navigation
1.23 * (square root of height of transmitter + square root of height of aircraft) = range of the station in nautical miles
VDF
QTE
QUJ
ATPL Radio Navigation
Oxford Radio Navigation pg 77
VHF Direction Finder
Class A: accurate to within + 2°
Class B: accurate to within + 5°
Class C: accurate to within + 10°
Class D: accurate to > 10°
QTE true bearing from the station
QUJ true track from the aircraft to the station
Take-off Speed of a kangaroo that jumps 2.8m
ATPL Physics
Torricelli’s equation
This is used to find the velocity of an object without a known time interval.
Vf squared = Vi squared + 2as
a = gravity 9.8m/s^2 (insert as a negative)
s = 2.8m
Vf = 0
Find Vi
Ohm’s Law
ATPL Physics
Virgins Are Rare
V = I x R
Lever arm
ATPL Physics
Perpendicular distance between the line of action of a force and a pivot.
(Sine x angle of the line of action) x distance to the pivot along the arm
Lever principle, force x lever arm equals force x lever arm
Speed covered on a semi-circular track with a radius of 400m
ATPL Physics
pi x radius / time
Torque formula
ATPL Physics
Torque (moment) = Force x distance x sin (Θ)
Kinetic Energy Formula
ATPL Physics
velocity is in m/s
KE is in Joules
KE = 1/2 mv²
Continuous fire detector or Firewire principal modes of operation
ATPL AGK
Oxford AGK 1 pg 357
Negative resistance coefficient
-as temperature increases resistance decreases allowing current to flow between the electrode within the steel tube and the tube’s outer layer. As the current increases with decrease in resistance it will eventually trigger a fire alarm.
Positive capacitance coefficient
-as temperature increases capacitance increases. A half wave rectified AC control unit will discharge the element as feedback while temperature increases. At a certain temperature the feedback will be sufficient to trigger a fire alarm and unlike the resistance type, cannot result in a false alarm in case of a short circuit.
Shuttle Valve
ATPL AGK
Oxford AGK 1 pg 59
Often used in landing gear and brake systems. Shuttle valves permit an alternate system to operate the same actuators as the normal system. Under normal operations a fluid provided by the normal system freely flows to the service whilst pushing against a shuttle valve that blocks the alternate supply. When normal pressure is lost an alternate system is able to push against the shuttle valve to the normal side and reach the same service.
Passenger Oxygen
ATPL AGK
Oxford AGK 1 pg 341
Oxygen masks are stowed in passenger service units the doors of which open automatically by a barometrically controlled release mechanism if cabin altitude exceeds 14000 feet or upon manual selection by the flight crew. The mechanism is actuated electrically on chemical generator systems, and pneumatically on the gaseous system.
