BelArgUSA ---First may I wish you a very happy last flight --- I know you'll grease it ---
But regarding the V-5 that would be ok if you're and you know for sure that you ASD limited ---but if you're obstacle limited one may well sink below /at--the NTOFP [especially hot and high where that is more usual]--or-wind up with zero screen height when all of the perf assumptions are hidden from the view of pilots ----I think that one should simply use V1---today's operation 2 crew FMC run FD's are not good places to do such a thing --they gave your generation the performance data in the AFM set to think through such a decision---I don't think a today's operational philosophies permit such a thing to be done safely --believe me --- I do see where you are coming from but without that information it's a crap shoot
One could always use less derate or a lower than max [limiting] AT to increase performance margins although quite frankly I don't think airlines give enough training or data to safely artificially lower V1 as they may end up flying into the side of some ridge or skimming Flushing bay attempting desperately to fly ----also Carbon brakes are far more efficient then the older alloy ones ---
however, I stress only in the case of EFATO -- I don't care about tires and such a those speeds
and all the nonsense warnings are [thankfully inhibited] and all warnings are nonsense at near V1 speeds
---best of luck I am glad that you'll continue consulting and passing your rich aeronautical knowledge down to the next generation ---the 'me generation'--who may have spent more time listening to Misses Tooey [who teaches alot of hooey] than Mr. Davies
sorry I just could not keep my mouth shut -I'm one of the
Pugilistic Animus
