Where is the data support for gusts? Speed changes don't seem very great until the aircraft departs. This is an early 60s accident with very primitive flight recording. The conditions were serious Cbs. The main effect is violent vertical drafts. I think there is absolutely no evidence to support a hypothesis that horizontal gusts played any part whatsoever. This was an aeroplane torn apart by serious vertical acceleration probably coupled with large control inputs. Since those days, we've learnt to 'ride' it rather than try and maintain attitude/altitude.