Posted for "terrence o'neill" <troneill@charter.net>:

 Hamid,
    Permit me to agree.  Thunderstorms can contain hail the size of baseballs,
and 300 mph updrafts.  I have seen a Lockheed P2V with its wing's leading
edged hammered competely flat, vertically, as though by a huge ball-peen
hammer, and it survived only because it was flying slower than it's condition
A, where the wing stalls rather than overstresses... and has large fowler
flaps to make up for the lift lost at the leading edge.
    Consider the 98 SF wing of a IV-P, hitting such a condition at possibly
350-mph... with a wing that is rated at 3.8Gs Normal Gross ... where a gust
could produce more than 7 Gs.
    Then we might add to that the new data on positive lightning, which is ---
ten times? -- as powerful as negative for which we design.
    The anvil-heads deserve a lot of respect.
 Terrence.