Well, often the carrying of weapons impacts on weight and drag and that
impacts on endurance or in the air time. As for convergence, often they did
not bother about that from what I was told, since the basic need was to
disable the craft they were firing at and as long as all the bullets went
in somewhere you get a lot more chance of hitting something vital.
I believe Hurricanes had a better range than Spitfires, but spitfires were
faster and more agile.
Brian

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The Sofa of Brian Gaff...

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Harry Bloomfield; "Esq." wrote in
message ...
BBC News article claiming a 13 year olds intricate calculations persuaded
them to fit 8 browning guns rather than the four planned. Obviously
chances are improved of bringing down an enemy aircraft, the more guns are
being fired, but what is the intricate calculation needed to prove that?

It seems the guns were aimed to coincide at a range of 250 yards. 250
yards seems awfully distant to me, what they show of the films of the
time, it seems much less than 250 yards, maybe as little as 50 yards,
unless the used telephoto lens?