Hi Danny,
Your memory is still excellent. According to the Vamp T11 Pilot's Notes the Goblin produced 3200 lb static thrust, the clean aircraft auw was 10900 lb and a clean aircraft took 12 mins from sl to 30,000ft. The Meteor T7 PNs state that the Derwent Mk 8 or 9 produced 3500 lb static thrust. I'm not sure what a clean T7 auw was but the maximum auw was 18800lb. I expect this was full ventral and drops (ventral 175 imp gals and drops 2 * 100, - about 2900 lb at .79 sg). A clean T7 would get to 30 in 5.5 mins, and with a ventral it took 6.5 mins. Hope this is of interest.