PHX767
it's a dry heat
- Joined
- Dec 2, 2001
- Posts
- 349
Something else to consider
On ILS approaches, there is a TCH (threshold crossing height) listed just above the TDZE elevation (on Jepp charts anyway) . On most ILS's it is around 50 feet. That is the height that the GS antenna will be crossing the threshold. Consider that the GS antenna on most airliners is up on the front of the plane. Due to the body angle in final approach configuration, there is a LOT of airplane hanging down below the plane of the antenna. On the 767-300ER, (if I remember the ground school correctly) the clearance between the landing gear and the ground in feet is in the teens when on the GS crossing the threshold, and that is to touchdown 1000-1500 feet down the runway.
So it is a good habit for flying jets later on to fly the GS all the way to touchdown, although a lot of pilots will drift below the GS when they are over the pavement.
It is always appreciated when preceding traffic regardless of size clears the runway quickly. Have had cases where planes will stop on the runway and ask for directions to the FBO. Happened at MIA, had to go around.
On ILS approaches, there is a TCH (threshold crossing height) listed just above the TDZE elevation (on Jepp charts anyway) . On most ILS's it is around 50 feet. That is the height that the GS antenna will be crossing the threshold. Consider that the GS antenna on most airliners is up on the front of the plane. Due to the body angle in final approach configuration, there is a LOT of airplane hanging down below the plane of the antenna. On the 767-300ER, (if I remember the ground school correctly) the clearance between the landing gear and the ground in feet is in the teens when on the GS crossing the threshold, and that is to touchdown 1000-1500 feet down the runway.
So it is a good habit for flying jets later on to fly the GS all the way to touchdown, although a lot of pilots will drift below the GS when they are over the pavement.
It is always appreciated when preceding traffic regardless of size clears the runway quickly. Have had cases where planes will stop on the runway and ask for directions to the FBO. Happened at MIA, had to go around.