[TEC] Lawrence 10-B Slideruler/USN S495-S505

[ElCid97]

Greetings!

I'm hoping someone can at least answer this question -- if it's even able to be answered: "Can I add a working slide ruler to the US side that a user can use along the lines of the Omnimeter by Capt Scurvy or the RAOBF on the German side as done by the Dark Waters Team?"

I'm asking because I came across some nice pictures of a Navy S495/S505 slide ruler from about 1939 or so. Maybe later. It's basically a "Manheim" style instrument which was a liscenced version of the Lawrence 10-B slideruler.

I've made a "game" graphic as well as a "practice" graphic I'm using in GIMP with moving parts. I'm planning on adding a "manual" of sorts with pages you can print to make your own "real" S505 as well as some basic instructions for getting things like range, speed, etc.

Here are the images I have so far:

This is in-game in the S-Boat control room/conning station. I've attached it to the clock since it's draggable and can be turned on and off. This may or may not be a game-stopper, but that's why I'm asking.


https://www.mediafire.com/view/m391r...50405.jpg/file

This is the basic image to get the pieces from which are displayed on the ruler. As you can see, the "B-C1-C" slider is at the bottom for ease of cropping. Same with the curser at the top-left.


https://www.mediafire.com/view/d71ks...-10-B.jpg/file

Finally, this is what I'm hoping the thing will look like when finished. This is the image I'm using in GIMP to practice with. The printed version will have the scales only and the rest will be to "fold over" or in some way make it possible to have the curser slide back and forth.


https://www.mediafire.com/view/i86zm...Ruler.jpg/file

This is the code so far:

;================================================= ====
;================ USN L10B-Slideruler ================
;================================================= ====

[G29 I20]
Name=L10B-SliderulerGroup
Type=1026 ;Menu group
ItemID=0x29030001 ;Tentative (next number)
ParentID=0x29020000 ;Clock page
Pos=0,0,1500,446
Zone=0 768 1500 446 2 1 0x29020000 0.5 -1 0x29030001 0 0 0 0

[G29 I21]
Name=L10B-SliderulerBCSlideImage
Type=1031 ;Static bmp array
ItemID=0x29030002 ;Tentative (next number)
ParentID=0x29030001 ;L10B-SliderulerGroup
Pos=0,0,1500,79
Zone=0 768 1500 79 2 1 0x29030001 0 -0.104287 0x29030002 0 0 0 0
Materials=1
Display=2 ;Linear
Mat 0=data/menu/skins/american/gui/USN_L10-B.dds
Crop 0=0.080543,0.837864,0.914838,0.162136
MatFlags=0x1
TexFmt=0x0
Drag=false
BmpState=1
NeedFocus=true
SelOne=false
IdGroup=0

[G29 I22]
Name=L10B-SliderulerBackground
Type=1030 ;Static bmp
ItemID=0x29030003 ;Tentative (next number)
ParentID=0x29030001 ;L10B-SliderulerGroup
Pos=0,0,1500,446
Zone=0 768 1500 446 2 1 0x29030001 0 0 0x29030003 0 0 0 0
Materials=1
Display=2 ;Linear
Mat 0=data/menu/skins/american/gui/USN_L10-B.dds
Crop 0=0.083718,1,0.916282,0.837864
MatFlags=0x1
TexFmt=0x0
Drag=false
BmpState=0
NeedFocus=true
SelOne=false
IdGroup=0

;================================================= ====
;================================================= ====

I can upload to my Mediafire and you guys can take a crack at it or, at least, let me know what you did so I may duplicate on my end.

If anyone can help on this, I'd really appreciate it. S-Boats didn't have a TDC, so everything was manual. A "banjo" and "is-was" were the tools on-hand, but the slideruler was also on-board and could be used instead.


From what I understand, many S-Boat captains would just use the regular slide ruler. The Omnimeter, for example, was actually made by crews on the fleet boats (USS Cod, for example).


This, at least, is something that ALL ships would have available since it was "GI" from the start. At the very least, a sailor would be able to go to the nearest store (stateside, anyway) and buy one cheap since they were the "ancient" version of the modern calculator! LOL!

Thanks again!

ElCid97

PS: There was a slideruler made a long time ago that apparently worked and was posted on the forums here, but the link has been dead a LONG time now. If anyone still has that file, please let me know since we can probably do some forensic work (hopefully) and try to figure out how they did it several years ago.