...and improved rudder boost.
DP Davies, and he
alone, insisted Boeing improve the rudder power system on the original long-bodied 707.
Fix...or else.
Full marks for this fine gentleman, for if he had not, many folks would have surely died in accidents.
Davies had the big stick as regards certification, and he made it work. In spades.
Captain David P. Davies...a class act, in many ways.
Obtain a copy of his book...'Handling the Big Jets' and you will be informed about the rather poor handling qualities of early jet transport aircraft.
And, MUCH more.