Looking for some information

[Datalink]

Hi,I'm looking for some info on what sort of speeds and altitudes are flown when an engine in-op on the 744, can anyone help?Thanks

[Guest D17S]

That's a good topic that we haven't discussed much, but it's the basis of a lot of the take- off data we take for granted. Most simply, the take-off "V speeds" are based on surviving an engine failure (ahhh, prior to the end of the second segment of climb, other than a V1 calculated on the basis of a VMCG, field length limit or tire limits or . . bla bla). First, I wish I could say this without all the qualifiers, but that would never work. Second, the calculations of V speeds are extremely technical and I don't claim to be an expert, but I've spoken to some that are. For instance even more simply, V2 is the climb speed that will allow the airplane to climb with an engine out. The FAA minimum for an engine out, V2 climb is a 0.3% climb gradient. Overall, V2 must allow the airplane to climb to 800 ft in 5 minuites at TO thrust. That's not much of climb. Also note where our FMC's TO page E/O Accel Ht is defaulted . . . 800 ft. So, I'll take a stab at V2. During a normal take-off with all engines operating, it can be necessary to pitch to a deck angle of up to 28 degrees to control that massive, ~250,000 lbs of thrust to an airspeed of "just" V2. TOGA and VNAV SPD are 'Speed on Pitch' modes. Here