name of altimeter setting thing
Kollsman window
altimeter errors
instrument
position
time lag
barometric
blocked static
altimeter fully blocked static
freezes at the altitude it was at when it blocked
altimeter partially blocked static
lags behind, which makes it underestimate in a climb and overestimate in a descent
vsi errors
position
time lag (6-9 seconds)
maneuver (sideslip)
vsi fully blocked static
freezes at 0
vsi partially blocked static
lags behind a lot
airspeed indicator errors
instrument
position
maneuver
density
blocked pitot or static
blocked static in climb
airspeed under-estimates (you’re going faster than what’s indicated)
blocked static in descent
airspeed over-estimates (you’re going slower than what’s indicated)
blocked pitot, clear static
airspeed indicator becomes like altimeter
blocked pitot intake, clear drain
airspeed drops
what is real wander / mechanical drift?
its when the gyro drifts
vacuum system consists of:
engine driven vacuum pump
relief valve
air filter
suction gauge
tubing
turn angle formula
10% of TAS + 7kt
TAS formula
TAS = IAS x sqrt(PAlt / SLP)
attitude indicator behavior when accelerate
shows climb
attitude indicator behavior when decelerate
shows descent
what is isogonic line
line of equal magnetic variation
what is agonic line
line of 0° magnetic variation
6 compass errors: DaVinci MONA
Deviation (aircraft’s electrical system interfering)
Variation (ex: +14°)
Magnetic dip
Oscillation (turbulence making compass bounce and shake)
Northerly turning errors (SAND)
Acceleretion and deceleration errors (ANDS)
line of sight range formula
range = 1.23 (or 1.25) x sqrt(altitude)
BTS
magnetic bearing (bearing to station) = relative bearing + magnetic heading
