Vtp is a comprimise between ending up dangerously fast or dangerously slow
as gusts can lead to both conditions... therefore without
very good reasons one should not generally fly slower than Vtp either...I've written about those limitations before but I don't want to repeat all of that...I'll try to find those old posts as the argument is quite involved; note my typing at times is bad---so if I wrote something that doesn't make sense let me know...
http://www.pprune.org/professional-p...es-flight.html
my post in the above may make more sense in light of seeing FAR25.341
Note I'm speaking about a 'loophole' in the gust envelope
Electronic Code of Federal Regulations:
