On Sun, Sep 10, 2006 at 11:56:15AM +0100, Ian Pascoe wrote: > > If you could print it off, and maybe send it to me as a picture file too Ian, is this any use to you? http://www.hyperspace.org.uk/parabola.pdf Chris -- Chris Eilbeck MARS Flight Crew http://www.mars.org.uk/ UKRA #1108 Level 2 UYB Tripoli UK Member #9527 LSMR