Sorry to go off subject a little,
Monopole
One of us needs to rethink this.
So considering 'blue line' is a best rate speed, and 'red line' is best angle speed,
As for Red Line, people are scared of it because it is often close to Vmca
So close??
Aircraft receiving type certification under FAR Part 23 after November 1965
Vmca = Air minimum control speed
Takeoff or maximum available "power"on operating engine, critical engine windmilling (or feathered if autofeather device installed) landing gear retracted, flaps in takeoff position and CoG at aft limit. =
RED REDIAL LINE = Obviously changes slightly
Vxse = Best Angle of Climb speed (Single Engine)
Speed which produces most altitude gain over a given distance with one engine inoperative.
Is not indicated on the ASI it is published in the flight manual.
Vxse is normally higher than Vx
Climbing at RED LINE is fraught with danger.
Larger a/c reduce their V1, Rotate and V2 speeds depending on a/c weight
Not true either.
To maintain a balance field length, the FMC computed V1, Vr and V2 for a lower weight on the same runway is often higher. There are all sorts of variables including weight, flap setting, thrust setting, wet/dry rwy for starters that effect V1 etc.
In
some aircraft under certain circumstances your comment maybe true, in medium weight twins like Dash 8, that is probably only because they have a simplified method of calculating speeds. Normally some tabulated form rather than a computer. The computed speed for lower wights may well increase the V1, Vr and V2.