"Bob Moore" wrote in message
. 121...
"kage" wrote

Vr is normally higher than V1 (but not always), it cannot be less
than V1.

Isn't that a "mutually exclusive" statement. I guess V1 and Vr could
be the same, I've never seen that.

B-727-200...V1 and Vr were normally the same.


If Vr is the same as some other "V"
speed it is usually the same as V2.

I don't see how that can be considering the "speed increment"
required by the following from FAR Part 25:

(c) V2, in terms of calibrated airspeed, must be selected by
the applicant to provide at least the gradient of climb
required by §25.121(b) but may not be less than-

(2) VR plus the speed increment attained (in accordance with
§25.111(c)(2)) before reaching a height of 35 feet above
the takeoff surface;


Bob Moore
ATP B-727 B-707
PanAm (retired)



Vr and V2 are always the same in a Falcon 50, a part 25 airplane. Go figure!
I never got to fly something big.

Best,
Karl
ATP BE-300 CE-500 LR-Jet DA-50
Helicopter