Any 'Badgers' out there, or is there a 'Stokers Net'!? I'm trying to re-discover stuff I should remember about Flight Deck Machinery: How long were Ark Royal's catapults (103'?) before her modernisation and conversion 1965-'70? How long were Centaur and Hermes (103'?) (pre Port cat lengthening for Buccaneers) cats? What was the diameter of the two parallel catapult slotted steam powered cylinders? I think all the 1960's carriers had one version or another of the BS4 Catapult? Was the power cartridge for WW2 big ship Seaplane cats a 6" Shell propellant cartridge? Did the emergency barrier have it's own arresting engine, or was it connected to No 4 Wire? I've crawled all over the web and printed off dozens of relevant pages. It is very difficult to pin down some of these facts exactly. Any help would be greatly appreciated: thanks lads.