by using this method, I have gotten a ball park of around 240 mils=300 yrds for the wingspan of a bf 109.......which is good because my old eyes cant see 40mils that well :-)... I don't zoom in.
your points are valid crabby but I need to learn the range at which I should be firing . having the sight for off line drones should help build that sight picture. from there I can go back to my tried and true boresight to calculate lead
Since you don't zoom in, are you building a ring and dot gunsight with a 40Mil ring? When you say bore sight, you mean a dot then?
By the way, speeds of the drones offline using the lead computing gunsight are for a 65mph main ring, or 70Mil.
100mph principle.
For a 100Mil main ring gunsight.
At 1000ft(333yds), 50cal\Hisso 20mm round takes 1\3 sec to reach 1000ft. A con 1000ft in front of you, traveling left to right at 100mph, while looking through your gunsight, will travel 50Mil of your 100Mil main ring in 1\3 sec. 50Mil is 1radius of the 100Mil main ring. For every additional 100mph the con is traveling at, hold lead by an additional 50Mil or 1radius of the 100Mil main ring. This holds true for angles off your line of travel from 45-90 degrees while traveling away or across your line of travel.
Example - con traveling at 300mph, hold lead with 3 50Mil radii.
In our game a simple rule of thumb for this, at 300yds or less, lead with the windscreen uprights. Just remember, some fighters have their gunsight off set to the right. So using the left hand side of the windscreen, wait until they just begin to clear the upright.