Oh hell, it gets more complicated. Actually I can't calc victories per sortie as all I deal with are TOTALS. All I know is the total number of sorties and the total number of victories. This is getting very tacky. I could divide the victories by the sorties etc but I don't see what that would gain us.

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RAF 1966-73 Cpl Engine Fitter (Retd.) Trenchard brat 206th Entry
DBA and systems programmer 1981-2005. Now retired since 2014