galaxy flyer
...Would your type be the Boeing Whale?...
Yes, well guessed (if you didn’t look at my profile
)
...That seems like a lot of correction for x-wind...
It does, but then 40 kts of crosswind hitting the fin does create quite a turning moment. If we assume that the up-wind outboard engine fails at V1, obviously the lower the V1 speed, the smaller the maximum opposite turning moment the rudder can generate.
...and everyone quoted the book answer for Vmcg...
And they probably genuinely believe that, at V1, during a take-off in a strong crosswind, they are/must be above Vmcg.
It can take some explaining that, whilst they will be above the book Vmcg, they may very well not be above the actual Vmcg pertaining in those conditions.
...and passed over the idea that crosswind had any effect on Vmcg....
A demonstration in a simulator normally has a salutary educational effect.
I wouldn’t want to leave anyone with the impression that this is a major problem on every take-off, because it isn’t. Experiencing a limiting crosswind on take-off, in a lightly loaded B747, is a relatively rare event in the life of a longhaul pilot, and having the up-wind outboard engine fail catastrophically at V1 during such a take-off is extremely rare.
However, it could happen, and, like many problems in aviation, it will likely be handled much better if the handling pilot has a reasonable understanding of the potential problem, and an awareness of the conditions under which it could occur.
Regards
Bellerophon