Engine throttle

On Wed, 8 Dec 2004 at 14:28:29 in message
.com, Les
wrote:
A large delta aircraft like Concorde needs no flaps as the large wing
area traps a cushion of air beneath it and the ground during landing.
Also the characturistic nose high attitude of deltas on landing not
only provides hi lift but hi drag too. Perhaps when you was taking off
in that Concord you allowed the nose to rise too high. Beleive it or
not correct technique for take off in most deltas was to lift the nose
wheel only a few feet from the runway and the aircraft would rise on
attaining correct airspeed.

Abridged Concorde Take off from book 'Flying Concorde' by Brian Calvert
(Speeds only apply to the particular take off described).

Afterburners are armed, clocks are started and throttles advanced to
maximum.

At 100 knots four greens showing full engine power and afterburners are
confirmed. "Power checked"

Decision speed (V1) is 165 knots

At 192 knots 'Rotate'

A tug on the column to lift the nose then a smooth rotation to 13.5
degrees nose up. During that the Concorde leaves the ground at 205
knots. It is held at 13.5 degrees nose up.

V2 is confirmed at 221 knots. As the speed builds the nose is pulled up
to 18 degrees. Then usually the nose is pushed down to 12 degrees,
afterburners are cut and the throttles pulled back to a noise reducing
setting maintaining a speed of 250 knots.
--
David CL Francis