Quote:
Originally posted by Sulky Boy:
The Aldis has no magnification (preceding Heath sight was X3) and entered combat with a small circle for aimpoint and a larger circle set for a fighter wingspan at a crossing speed of 100mph. Later models the outer circle gave a Gotha wingspan at 200yards.
German pilots sought the Aldis' from RAF crashes and later Oigee made a copy.
Aldis issued to selected squadrons in mid 1916 for trial. By 1917 became the British standard model for fixed guns. Chretien introduced in 1918 and Oigee followed.
Wallace-Vol 1 and Vol 2.
If I can help, just ask.
Sulk'
is there detailed plans/photos of sights? The mostly interesting is Le Chretien sight.

VikS
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