Challenger Crashe at TEB

Runways are selected to assure the ability to accelerate to V1 and then stop with maximum braking. You are committed to
fly passing V1, but that assumes that the plane will fly. Quite often Vr is faster than V1...

Blueskies wrote:

Runways are selected to assure the ability to accelerate to V1 and then stop with maximum braking.

Isn't it the other way round: The runway length defines v1?

Stefan

"Stefan" wrote in message ...
Blueskies wrote:

Runways are selected to assure the ability to accelerate to V1 and then stop with maximum braking.

Isn't it the other way round: The runway length defines v1?

Stefan

Well, yea, gross takeoff weight and density altitude, etc control define V1, so you could look at a runway then decide
the max weight allowable for that day. You need to be sure that the runway is long enough to accel to V1 then stop...

Blueskies wrote:

Quite often Vr is faster than V1...

Knowing this, but being only SE rated, I've a question:

It seems that certain problems become apparent only at Vr. So why not use
that as the "size of runway/weight of aircraft" factor?


I'm also curious as to whether the aircraft in this accident gets the same
type of runup as do the little Cessnas I fly. One part of this is always
pulling the yoke back and confirming elevator movement (in the proper
direction).

- Andrew

"Blueskies" wrote in message
m...

Quite often Vr is faster than V1...

By definition Vr is never less than V1.