Dear Andrew41 -
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Your thinking is absolutely correct. Crosswinds, etc...
Jet transports have a VmcG (also our minimum V1 speed), but, at least we deal very little with that VmcG limitation, this at least with a 747...
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My charts are for JT9D-7Q engines, our highest VmcG is listed as 128 KIAS... Our typical V1 speeds are in the order of 150 KIAS, with VR speeds in upper 160, lower 170 KIAS... therefore there is quite a marging for controllability.
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I see this in simulator often. Should you set a very low weight, and speed combination (at or near V1 and VmcG), the airplane is extremely difficult to control. An engine failure at high V1, with substantial VmcG margin, is quite easy to demonstrate satisfactorily on proficiency checks. A "V1 failure" and engine out takeoff is easy to perform at a typical weight of 377 tonnes (833,000 lbs) weight.
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If aware of a severe crosswind, say 29 knots (?) and dealing with a V1 near VmcG, obvious... it enters in my concerns and the before takeoff briefing... these are obvious things for guys flying the line... just should be mentioned occasionally while in recurrent training...
xxx
