There ya go. Thanks Henry.
Troy
Note that Andrews was chief engineer for rocket engines at the engine
contractor (originally Armstrong Siddeley Motors, later under other corporate
names), while Robinson was head of launcher development at RAE
Farnborough. That is, these are "primary sources", people who were there
and in a position to know the details. That doesn't make them infallible, but
they're inherently more reliable sources -- especially on technical details
-- than
second- or third-hand accounts from non-participants.
Henry