Glueball
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Way Way WRONG.
Maintain Turbulence Penetration speed; B747: 290-310kts or M.82 to M.85, whichever is lower, to avoid low speed buffet/stall.
I said it's controversial---read the LONG justification, for that statement
http://www.pprune.org/professional-pilot-training-includes-ground-studies/388963-principles-flight.html---It's not in the manuals, or even [really] in the FARs, and it even goes a little against the advice in HTBJ- which is what your manual says to do- although he comments about today's speeds are pushing too close to the high speed/buffet boundary area.......
I'm talking about ultimate survival, from an extreme circumstance well beyond the protections of Vtp or FAR 25.343...
25.343 gust envelope protections are very comprehensive...but...
