Aircraft gunsight range adjustment

[LTCClark]

after reading about gunsights and knowing that the simulation is as if you would have caged your sights gyros it would be applicable
to be able to adjust the range of your sight to your guns, or what would be better is to be able to zoom your sight in and out making the ring size smaller or larger depending on your preference.

the ability to do this would correct things like the size of the reticle for the a6m, mostly all of the japanese fighters as well as planes like the f4u etc.

while we can set our convergences for the guns it would be nice to set the reticle size to those guns making us see where the bullets will fly.

another one is to have the reticle at least move a little to mimic an uncaged sight, and when you are pulling Gs make it go to static mode.

Sent from my SM-N920P using Tapatalk

[The Fugitive]

i believe if you change the mil file associated with the site in question you can make the site smaller.

[bustr]

The Type98 and Type4 gunsight in the a6m family and N1K2 had reticles of 145Mil and 140Mil to account for the slow velocity of their cannon rounds. If you could actually change dynamically the Mil diameter of your reticle ring. "And if" you are using your 100mph 100Mil ring for lead shooting based on the 100mph priciple, you have just change your lead calculation so your ring becomes useless to you.

In the K14 the diameter of the 6-star could be changed based on range and the known wingspan of enemy planes so you could begin firing at the range you dialed the wingspan to. The active gyro still accounted for the time to target and drop of a standard 50 cal round. A second gyro accounted for the effective change in lead calculation of time to target and range that you introduced by changing the diamter of the 6-star active reticle.

When you cage the active reticle and enable the fixed, it is a 100mph ring and your guns were usually harmonized between 300-400yds so you could use that 100Mil(100mph) ring based on the 100mph principle for the 50cal round. As long as your round is not below 700m\sec, the 100mph ring suffices. That is why it was the standard across all of the nations in WW2. Since the rounds for the a6m and N1K2 cannons were not quite 700m\sec, that was compensated for with larger reticle rings. 

If for some reason you need to change the diameter of the historic reticles I gave Hitech for AH3, edit the Mil file with the same name as the BMP file of the gunsight you use. Then change the number 256 between 16-512 in increments of 16. Other than with the K14, reticle in WW2 were fixed sizes because pilots learned deflection shooting and range estimation based on 100Mil unless they were using very early 35Mil or 70Mil rings which proved useless for air combat between fighters. This was the reason the vast majority of AAF fighters in the ETO had their American gunsights pulled out at the staging depots and replaced with British MkII until the Mk8 and K14.

[atlau]

What do you mean by the 100 mph principle

[bustr]

WW2 100mph principle.

1. - ANM2 50cal round on average covers 1200ft(400yds) in .25 seconds.
2. - An aircraft between 200-400yds in front of you traveling 90 degrees to your line of travel will cross half of a 100Mil ring from edge to dot(50Mil) in .25 seconds if it is traveling at 100mph.
3. - For every additional 100mph the plane is travel at 90 degrees to your line of travel, hold lead by another 50Mil.

For an average speed of 300mph hold 150Mil lead between 200-400 yards, between 35-90 degrees this will hold true in general. In the K14 this is what the gyros are accounting for once you set the wingspan for the type of plane you will be chasing. Most fighter pilots can learn to fly quite well, doing this with just a fixed ring and their brain is an art from beyond them. Just like some guys are naturals at skeet shooting.