I think we have all presented our numbers. So, we can lay this to rest. We can only corroborate if someone (perhaps
@Kunal Biswas or
@sayareakd?) visits this tank and takes some real measurements.
You have only made a determination of the out side dimension ,
In post no-5651 and 5654 , I have made a clear inside measurement based on the known human face height as a basic parameter.
http://upload.wikimedia.org/wikipedia/commons/6/61/HeadAnthropometry.JPG
pmaitra,
In the link above human head average measurements are given,
In that table the height of the human head from chin to skull is given as 23.2 mm for 50 percent of males in item no-14.
In the picture posted above 1.7143 is the ratio of this human head height to the Tc seat head rest behind him at a point close to the
left hand side edge of the head rest.
So the height of the head rest is 23.2/ 1.7143= 13.
53 mm, is the height of the Tc seat head rest at the left hand side edge of the TC
http://upload.wikimedia.org/wikipedia/commons/6/61/HeadAnthropometry.JPG
In the picture below the ratio of the [horizontal distance between the front surface of the TC head rest and the inside opening of the vision block on the top left corner of the picture ] / [height of the Tc seat head rest is ] = 85
So 85 x 13.53 = 1149 mm. from the front surface of the Tc seat head rest
[So from the 2500 mm pivot base point (
if we exclude the gun covering plate this 2500 mm point becomes the 2350 mm point, because we have to give a 150 mm depth for the gun covering plate)the roof top vision block opening is situated 1149 mm away.Dejawolf too agrees with this and has a claim of 1200 mm for the same region. So no dispute here just 50 mm this way or that way.
See in the photo above the vision block over the tc's seat is well behind the pivot base and not even visible.
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
In the picture above , In the same way the ratio of [ distance from front tip of the turret(
excluding the gun cover plate) to the pivot base of the hatch cover ] / [ distance from tip of the turret (
excluding the gun cover plate) to for hatch cutaway ] is 3.14 .
In the image below distance from front tip of the turret(
excluding the gun cover plate) to the pivot base of the hatch cover is 2250
so 2250 / 3.14 = 716 mm is the gap for the hatch cutaway.
.
So 2350 - 1149 - 716= 485 mm.
So 485 mm is the LOS for armor behind main sight till the opening of the roof top vision block into crew compartment.
What is the bone of contention is what happens after that, I am arguing based on the shape of the rectangular cut , that the light from the roof top vision block comes through a rectangular channel and after that channel there is a small block of armor 200 mm more in depth above the orange dial box, which is not accepted by any one here.
