I unchecked the 'lock framerate' box and set the fps to 60 on the FRAPS movie menu. Apart from an occcassional sudden 'glitch' (dropped frame?) it seems to hold at 60 fps. Worth mentioning that I do have it set to save films on a second hdd, and I've just overclocked a 2.4G cpu to 3G and dumped my 9600GT NVidia for an 8800GT. Fairly happy with the results so far, I've knocked up a short vid of a few sorties in the WW1 arena as a test run. I'm avoiding YouTube as they always seem to strip frames off my stuff, and I think flying sequences need to be smooth.
Anyway, if you'd like to take a look the file is downloadable from this link:
Camel_Crazy_Downunder.wmv - 68.9 MB
