Flight plan Flashcards
Flight plan: To/From
These are the start points and end points of each leg, TOC and TOD are included in these
Flight plan: Alt ft
The altitudes of each leg using the altitude selection procedure, note that for climb/descent leg you will need to insert both starting and finishing altitudes into the table using a /
Flight plan: What is mean alt in climb and descent rounded to
nearest 500ft
Flight plan: CAS
Given in operational data
Flight plan: Temp
This is the temperature at the altitude of the leg, it will either be given as a freezing level and so you must use the temp lapse rate of 2/1000ft or it will be given at certain altitudes and you must interpolate
Flight plan: How is the mean temp for the climb/descent legs worked out
- For the climb it is taken at 2/3 of the way up and noted as (temp/altitude 2/3 of way up)
- For descent it is taken at the 1/2 way down point and noted as (1/2 way down alt\temp)
Flight plan: What are temps rounded to
Nearest whole degree
Flight plan: TAS
Calculated using nav computer and input CAS, temp and alt. For climb and descent the 2/3 and 1/2 way point are used.
Route selection considerations
Weather and airspace
Selection of cruise alt
- Height of terrain combined with a/c performance: 500ft above highest spot height combined with optimal a/c and engine performance data from flight manual
- Weather: cloud base, FZL, W/V
- ATC requirements
- VHF radio reception
- Magnetic track/ alt requirements
Magnetic track/ alt requirements
VFR always 500ft
- Flying north (270 to 089) odd numbered alts e.g. 3500ft
- Flying South (090 to 269) even numbered alts e.g. 4500ft
Fuel planning - calculating fuel consumption rate for a given leg
Found in the the a/c flight manual on the cruise performance chart, by using the AUW, TAS and cruise alt, consumption rate can be interpolated
Calculate minimum fuel required for a flight
Add together:
- all zone fuel requirements
- quantity of the 30 min reserve
- amount for taxi, takeoff, climb, approach and landing
How is reserve fuel requirement calculated
30 mins at holding consumption rate
Latest time of departure
Calculated using the daylight table, if the flight is restricted to day only, it must operate between MCT and ECT so using the daylight table for the zone you are landing in work out the ECT on the date specified and subtract your flight time
Max holding time for a given leg
Max holding time will involve you flying for max endurance (burning the least amount of fuel and therefore using the lowest power setting to remain airborne)
Flight plan: cruise leg distance and time
Track distance for each leg can be measured with a protractor/nav ruler and then leg time is calculated using ground speed
Flight plan: climb and descent legs time and distance
Time to TOD and TOC can be calculated using ROD/ROC info, then distance to TOC/TOD can be calculated using the time and G/S. Once you’ve identified the distance to TOC and TOD you can subtract this off the distance of the first and last legs to give you the distance of the cruise portion of the first and last legs.
Flight plan: what are distances rounded to
The nearest nm
Flight plan: what is time rounded to
The nearest half/whole minute
Flight plan: wind velocities
Wind direction is provided by metservice in °T, for the climb portion of the leg the 2/3 of the way up point is used, for the descent portion the 1/2 way down point is used, using the wind velocities provided interpolate to find the wind velocity at the altitude in question to the nearest °T and nearest kt
Flight plan: HDG °T and G/S
Using triangle of velocities method on nav computer
Flight plan: HDG °M and °C
°T +/- Variation = °M +/- deviation = °C
- variation amount is found on VPC/VNC and the variation line/isogonal that applies to the greater part of the leg is used
- deviation is found by applying the compass deviation card
If deviation/variation is west
Add (west is best)
