AF I see from my logbook that in July 59 I cadged a copilot slot with BCDU (Bomber Command Development Unit) after my 49 Sqn Cdr had ordered me to go on leave. I flew with FltLt Hogg on water meth trials and with Sqn Ldr Gibson on RATOG trials (I seem to remember they were Super Sprites). I remember nothing of the former but the Sprites gave endles trouble as the recovery chutes failed to open or the shock absorbing airbags failed to inflate, or both. In either case it was terminal. My own sqn cdr eventually found out and I was banished from the base for a fortnight.