Ranging and fire control problem

[Charos]

Originally Posted by Joe S

My math skills are limited to basic multiplication , division, addittion and subtraction. Based on your research, what is the actual magnification of the scope in high and low power? Once we know the magnification, how do we use the recticle to get the range of a target? thanks! Joe S

Joe going by the real life values of the following:


Type II
Magnification high power 6.0X
Magnification low power 1.5X
Maximum elevation of line of
sight (above horizontal) 74.5 degrees
Maximum depression of
line of sight (below horizontal) 10 degrees
True field high power 8 degrees
True field low power 32 degrees
Ranging Device Stadimeter
Telemeter
Scale

Outer diameter reduced section 1.414 in
Optical length 40 ft


Type IV
Magnification high power 6.0X
Magnification low power 1.5X
Maximum elevation of line of
sight (above horizontal) 45 degrees
Maximum depression of
line of sight (below horizontal) 10 degrees
True field high power 8 degrees
True field low power 32 degrees
Ranging Device Radar
Telemeter
Scale

Outer diameter reduced section 3.75 in
Optical length 36 ft


You can see that both the Observation and Attack scopes have 6X and 1.5X
magnification at 8 Deg and 32 Deg Field of view respectively.

You can see that the pattern:

8 Deg = 6X
32 Deg = 1.5X

Therefore 16 Deg = 3X
and 48 Deg = 1.0X

So the attack periscope on high magnification in SH4 provides approx 9.28 Deg FOV
or approx 5.17X magnification.


This whole thing to my mind is the most URGENT Bug in SH4 as it takes the whole TDC measurements out from what they should be.