[release] IJN periscope v 1.0
 

RL I-400 periscope :

http://img10.imageshack.us/img10/867...erishotcop.jpg
http://www.webenet.net/~ftoon/memory/japsub.html




ingame :

http://img253.imageshack.us/img253/9919/ijnscope.jpg

Finally we have an IJN scope for the IJN submarines :)

It took a bit of trial and error with the alpha channel, at one point I had no mask left but here it come !The picture seen here above was large enough as to have all the scopes' markings visible which in turn ensures a reliable and accurate scope ingame.


download link :


http://www.mediafire.com/file/jcz20i...eL_compass.rar


keltos

Are you sure that is a TRUE japanese submarine periscope?? :-?

Looks to me very similar to the US one :hmmm: , might be coincidence of course, but still.....

Another question: What are the lines calibrated to? 1 degree?

yes it should be, and yes the lines are 1 degree.

The japanese copied both the american and the germans optics for their scopes

http://img264.imageshack.us/img264/7967/85574862.jpg
http://www.fischer-tropsch.org/prima...ort%20X-05.pdf

http://img183.imageshack.us/img183/8831/33692108.jpg

http://www.fischer-tropsch.org/prima...t%20S-01-1.pdf

http://img17.imageshack.us/img17/5597/data.jpg

http://www.fischer-tropsch.org/prima...t%20S-01-6.pdf

keltos

US vs IJN periscope view
 

FLeet boat periscope :

notice the secondary vertical and horizontal lines forming across to the left and above the crosshairs.

http://img205.imageshack.us/img205/4601/scope02us.jpg

http://www.fleetsubmarine.com/periscope.html

RL I-400 periscope :

http://img10.imageshack.us/img10/867...erishotcop.jpg
http://www.webenet.net/~ftoon/memory/japsub.html

Here the secondary crosshair is not there
the vertical graduations do not match the horizontal line like on the US scope
there are 3 graduations under the horizontal line to be level with the vertical markers to the left, 4 on the US scope.


-> ergo different optics

The fact that the optics were copied from, or inspired by the US and german devices does not mean that the reticles would be copied exactly. In fact, I think that it refers much more to the glass and metallic parts, to the hard parts of the construction.

The shot you posted looks to me like a picture of a japanese submarine when viewed through a US periscope, probably after the rendition of Japan.

There are many pictures taken through periscopes of Fleet Boats, and none I have seen do have those additional vertical and horizontal lines of that drawing you posted above.

See this f.e. : http://en.wikipedia.org/wiki/File:Pe...ew-sinking.jpg

And this one from Wahoo's scope: http://upload.wikimedia.org/wikipedi...scope-view.jpg

Come to think of it, may be you would get a good reticle if you are able to see a picture of what current japanese submarines are using today. From what I have seen so far, US Los Angeles class submarines still have in their scopes the same reticle as during WW2, and more or less the same happens with the russian and british submarines.

And in any case, even if it is different from the WW2 counterpart, it still will be positively from a japanese sub :up:

Look at this, this one is a german reticle from the contemporary U-33 (Type 206 class): http://1.bp.blogspot.com/_cys2T5FgJd...3%2Blaunch.jpg

And it looks almost identical to the WW2 reticle in the observation scopes (I have pictures of the manual of one of those scopes and can confirm that)

view from tresher
 

http://img4.imageshack.us/img4/7900/ss200scope2.jpg
http://www.broseker.net/babroseker/index.shtml

I would tend to think that the american periscopes were standardized.

Here above is a shot through Tresher's scope.

keltos

Asahi small periscope
 

Found this small Asahi periscope (last character to the right of the label) on the net :

http://img87.imageshack.us/img87/6276/a17f08.jpg


with label on the box :

http://img514.imageshack.us/img514/975/a17f02.jpg

http://www.aohc.it/selart17e.htm

which I then used on the IJN periscope :

http://img7.imageshack.us/img7/1856/scopeasahi.jpg



So we now have an Asahi labelled periscope :)

Keltos

D/L link :

http://files.filefront.com/V+10+IJN+.../fileinfo.html

Just a suggestion: Why not put it on the scope instead of the Torpedo Launch panel?

http://img243.imageshack.us/img243/9387/scopelabel.jpg


Peabody

cause I didn't find where the texture came from ? if you can help..

here goes the label :
http://files.filefront.com/labelPeri.../fileinfo.html

keltos

Here's USS Bowfin's periscope : no horizontal line :

http://img100.imageshack.us/img100/9...tboatscope.jpg

http://images.search.yahoo.com/image...sigh=118tg705g

Keltos

Very nice pic through periscope :up:

I would say that it is clear by now that the picture you used is of a US periscope. :hmmm: Wether japanese submarines used them or not, is the question, but I'm inclined to believe that there would be some differences.

Are the numbers in japanese normally written as in our language, or do they use special symbols?

They used symbols all right, not roman numbers or arabic ones for that matter i think..

I've asked a couple friends in Japan to see what they could dig up at the Kure museum . wait and see..

I wonder where all the data recovered by the US went ? the periscopes and all the studies of japane subs ?

I know they had the Ordnance Bureau analyse them, but hey since i'm in europe it's kindo hard getting access to whatever declassified material there might be... :(

keltos

and it seems that the scope I got my hands on could be post-war as fleet subs' periscopes never show the horizontal line.

Which one?? There is none in the pic of the first post :-?

label on scope :

http://img523.imageshack.us/img523/3...iperiscope.jpg
http://img523.imageshack.us/img523/a...pg/1/w1024.png

USS Becuna :

http://img9.imageshack.us/img9/2424/...peviewofmo.jpg
@Hitman : this one for instance : USS Becuna's scope

keltos