Bladder is definitely the limiting factor! Still, an interesting question so I checked through my log book (which I keep in Excel format as well as paper in case I ever lose the real logbook). Nothing fabulous really... longest flight was 2h15m from Sky Acres 44N (NY/Connecticut border) to Fulton County NY27 (upstate NY) having flown over the Catskills with my mate Andreas in his beautiful modern classic C170B - gorgeous! This was my first experience of flying in the US, and impressed me immensely!
My longest flight in the UK was 2h15m from White Waltham to White Waltham for the the recent RIN TopNav 2002 event... fabulous fun for me, doing all the flying, but tough on my mate
1013.25 doing all the nav!!!
It was a great day - fabulous views of Beachy Head when we got there - but still haven't see the results. Don't suppose we won but would like to know where we ended up, i.e. just how bad we were!