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5. triangle of velocities
1.
2. VECTOR: Conjuction of 2 parameters:
• Module: Quantity, actual value, dimension
• Direction: “Where is it going to or coming from”
3. DEFINITION: Triangle made up of 3 vectors
• AIR VECTOR …………………….(TAS / TH-MH-CH)
• GROUND VECTOR ……………..(GS / TT-MT-CT)
• WIND VECTOR ………………….(W / V)
For every flight planification we must find out all of the 6
parameters
Whenever we have 2 of those 3 vector we can calculate
the other.
Graphicaly over a map
Two ways:
Using a navigation computer
4.
5.
6. DEFINITION: Vector representing the actual path the
aircraft flies inside the airmass.
Defined by 2 parameters:
• TH = Heading the aircraft would actually fly if
there where no drift
• TAS = Speed the aircraft would have above
the ground if there where no wind
7. DEFINITION: Vector representing the actual path the
aircraft will follow over the ground taking into
account wind.
Defined by 2 parameters:
• TT = Actual path the aircraft follows
over the ground.
• GS = Relative speed of the aircraft
and the ground
8. DEFINITION: Vector representing the actual wind
conditions.
Must take into account winds aloft are usually
given as true and METAR / TAFOR are in
magnetic.
• W = Direction where the wind COMES FROM
(Magnetic,true or compass)
• V = Wind intensity (Velocity)
9. DEFINITION: Mesurement of the amount of degrees
the wind is pushing the aircraft on the direction
opposite to the one it is coming from.
Angle between the Heading and the Track
10. DEFINITION: Angle and sense from the Track to the
Heading. Angle you have to change the rhumb of
the aircraft to keep it on the desired track
Equal amount and opposite to the Drift Angle
11.
12. OBJECTIVE: Whenever you’ve already calculated your
triangle and for any reason wind changes, there’s
no need to create a new one. Instead you can
revise it.
13.
14. DEFINITION: Difference between the directionof the
desired track (DT) and the direction of the track
actualy flown (Track Made Good = TMG).
Given in degrees left or right.
NOTE: Another way of describing it is by stating how many nm your
position is left or right of the desired track
15.
16. Whenever you realise you’ve lot your way and
need to regain your track to reach a
certaing point
