Wyvernfan, Hi,
There are several instances on the whole of that web-site that indicate that these guys were either extremely brave (knowing the possible problems), or extremely dedicated (knowing the possible problems). But they went and did the bizz.
In any case they do (in my opinion) rank alongside the guys who were being shot at!
Resmoroh

well said……
this year is the 70th anniversary of test flying at Boscombe Down…