View Full Version : Convergence measurement + gunsight calculations

06-19-2005, 05:10 PM
In this thread there was a discussion about how to calculate distance using the gunsight ring.

There were two original WWII pamphlets used as a source of information.
One pamphlet used metres and the other yards. This meters/yards thing brings up a question!

I wonder if you have to convert your convergence distance(m) in the set-up screen into yards for some aircraft selections?

For example, you like firing at fighters when they are near enough to fill a third of your gunsight ring. According to the RAF pamphlet the enemy will be 300 yards away at that point, not metres. So if you had set your convergence to 300m to match that, not realising that the gunsight measurement is actually in yards, you would therefore be 25m out. You would have to set convergence to about 275m to obtain 300 yards.

Does anyone know if the modellers used metres in all aircraft when modelling the gunsight size, or did they use the actual, original dimensions, so that distances are actually measured in yards in some aircraft?


06-20-2005, 01:40 AM
Hi Antifreeze.
In tests using the Quick mission builder, the gap accross the centre of the spitfire and Hurricane gunsights appear to be set to measure 200 yards (183 metres) on a 109 sized target.