Old fashion method for determining SPEED

[don1reed]

1. Get on a Collision course with the Target.
Constant bearing plus closing Range = Collision Course.
Adjust your own course and/or speed.

2. Formula: Own Speed : Sin Target AoB : : Target Speed : Sin Target Bearing
3. If you have a sliderule hidden in the desk drawer, dust it off, this method is extreme fast.

Here are two views, one is of a regular sliderule, and the second is a circular sliderule. The logrithmic characteristic and function of sliderules makes this an easy problem. (apologies for the bit of blurriness)

http://img59.imageshack.us/img59/3784/versalog2zq.th.jpg (http://img59.imageshack.us/my.php?image=versalog2zq.jpg) http://img148.imageshack.us/img148/9625/vg2ud.th.jpg (http://img148.imageshack.us/my.php?image=vg2ud.jpg)

Here's the same thing with a sliderule that I made from heavy card stock and covered in clear plastic at Kinko's used with the original Silent Hunter.

One side is sliderule the other is whiz-wheel.

http://img124.imageshack.us/img124/8449/vg7kn0so.th.jpg (http://img124.imageshack.us/my.php?image=vg7kn0so.jpg) http://img140.imageshack.us/img140/5805/cnbr2id.th.jpg (http://img140.imageshack.us/my.php?image=cnbr2id.jpg)

Here's a pic of a rare WWII Uboat whiz-wheel

http://img19.imageshack.us/img19/894/tdcwheel8tf.th.jpg (http://img19.imageshack.us/my.php?image=tdcwheel8tf.jpg)

[Onkel Neal]

Very nice! I love this stuff, this is the real fun of a subsim, getting into the head of the skipper and making the torpedoes intersect the ship, no arcade stuff. Thanks, I am off in the morning to buy a slide rule.:up:

[Drebbel]

Wow IMPRESSIVE !

[Myxale]

:cry: Don! I feel so little now. I shall hang my captains hat, and turn to awayform my Boot. :shifty:


But this rules!:rock:

[Charos]

I only hope who ever is creating SH4 is takeing notes of this thread.

I dont want to sail in the good Uboat lollypop again. :88)

[jason210]

I made a similar device out of a piece of card and a piece of acetate. Works great foir torpedo attacks. Be a nice addition in a WWI sub sim.

http://www.sjobo.nu/resource/images/1.jpg

http://www.sjobo.nu/resource/images/2.jpg

http://www.sjobo.nu/resource/images/Render2.bmp

Anybody who wants the plans for this can get them from me.

I've also made a 3D model of this, that runs as a small program (.exe). You just need to minimise the game and get it up, but you can make notes from it and be ready to fire the torpedo at a certain time and certain angle.

[greyrider]

if you guys like these calculators and whizwheels, then you probably
would really like these.
these are not mine, they were made by a guy by the name of kim ronhof,
and was made for silent hunter I
these will probably be very good for sh4, when it comes out, if its the pacific theater.


Kim Rønhof tools
the first thing you need to do in order to see these whis wheels and tools is to download
a free demo of DELTACAD.
you can get it here:
http://www.deltacad.com/demo.html
download and install this program, then go to my rapidshare tactical folder and download
the all six files from the kim's tools folder, then open the files with deltacad.
the doc file shows you and instructs you on how to make the tools.
i downloaded these a few years ago, and they are really nice.

my tactical folder is here at rapidshare,

http://rapidshare.de/users/7G4TQT/9

the password is

silenthunter

the tools are

KimsTDCManualManualMk7.doc.htm
Kims_COURCE_CALCULATOR_MARK_4B
Kims_RANGE_CALCULATOR_MARK_3B
Kims_MANUALTDC_1
RADAR_PLOTTER_MARK_8_BX

[don1reed]

Glad y'awl liked these items...

...I've always dreamed that the Devs of any subsim would include a "cut-out" whiz-wheel to go along with the package of maps 'n charts and "cheat" sheets.

They're not hard to make. I have the pieces on files. Is it possible to upload them to Terrapin's sight?

@jason210: check your PM. tnx.

@greyrider: You said it, brother, Kim Ronhof, is the best!

[CptGrayWolf]

...I've always dreamed that the Devs of any subsim would include a "cut-out" whiz-wheel to go along with the package of maps 'n charts and "cheat" sheets.

Eh, they can't even make a decent manual nowadays...but that would be great. Hopefully in SHIV they will give us more documentation/maps etc... and realise that not all gamers suffer from Attention Deficit Disorder.
Good job :up:

[greyrider]

don
that slide rule is very nice, do you have that in your possession?
can it be bought?

i love tools of the trade!

[don1reed]

...greyrider...if you mean the laminated bamboo Hemmi versalog model...part of the legacy for the sons'. Both circular models are home-made, however.

Those interested in BUILDING one of their own, need to look here:

http://www.sphere.bc.ca/test/build.html

[coronas]

An idea for guru moders. Can anybody make a ruler as this in the same way than dragabble crono for TDC screen?

[don1reed]

Great idea, coronas. Here's some virtual slide rules...maybe the modding guru's could find away to incorporate one of these babies...

http://www.antiquark.com/sliderule/sim/

[jason210]

Since so many have PM me for plans, I'll put them up on a website in the next week or so. I'll post the link here.

Thanks for the interest!

[greyrider]

don, the hemmi was what i was looking for,

people still sell em, but they re about 212 bucs, thats a lot of money.

doing a internet search for info on SR'S, i came across this book at target departments stores.


the name of the book is:

Slide Rules and Submarines: American Scientists and Subsurface Warfare in World War II

by montgomery c meigs




http://www.target.com/gp/detail.html/sr=8-7/qid=1150578536/ref=sr_8_7/602-0076488-5380678?%5Fencoding=UTF8&asin=0898759056


i might order this book, im thinking about it.

maybe subsim could order this book and have it available to us, so that they make some profit, and help with the finances of subsim.com

what do you say neal?

if you can get it , ill wait.

[don1reed]

Seems a bit on the dry side for my suits, but, did you look here as well?

http://www.abebooks.com/servlet/SearchResults?sts=t&y=0&tn=slide+rules+and+submarines&x=0

[IronOutlaw]

Hi Jason210

The stuff you have created sounds most interesting. If you can send me the plans and program you refer to at hmsironduke@ozemail.com.au I would be most grateful.

Cheers

[JohnnyBlaze]

I made a similar device out of a piece of card and a piece of acetate. Works great foir torpedo attacks. Be a nice addition in a WWI sub sim.

http://www.sjobo.nu/resource/images/1.jpg

http://www.sjobo.nu/resource/images/2.jpg

http://www.sjobo.nu/resource/images/Render2.bmp

Anybody who wants the plans for this can get them from me.

I've also made a 3D model of this, that runs as a small program (.exe). You just need to minimise the game and get it up, but you can make notes from it and be ready to fire the torpedo at a certain time and certain angle.

ME ME ME ME! :lol:

I would pretty much appreciate the program you've made so if you put it online then I'm sure to get it.

Thanks for the effort

[Augie64]

Oooooo A bearing Rate Computer...... :up:

[Dantenoc]

Smart stuff :yep:, very nice.

[Linton]

Has anybody tried to make a Spears wheel?it was made to compute periscope look interval.
http://www.chinfo.navy.mil/navpalib/cno/n87/usw/issue_15/images/spearsw.gifCan anyone clean the image up to make it readable?

[Alyebard]

I made a similar device out of a piece of card and a piece of acetate. Works great foir torpedo attacks. Be a nice addition in a WWI sub sim.

http://www.sjobo.nu/resource/images/1.jpg

http://www.sjobo.nu/resource/images/2.jpg

http://www.sjobo.nu/resource/images/Render2.bmp

Anybody who wants the plans for this can get them from me.

I've also made a 3D model of this, that runs as a small program (.exe). You just need to minimise the game and get it up, but you can make notes from it and be ready to fire the torpedo at a certain time and certain angle.
Please
amajosabater(at)gmail.com

thanks in advance

[don1reed]

Here's an example of how it all works: Submerged, daylight torpedo attack.

I've spotted a small convoy on my port bow, heading east. I adjust my course and/or speed to get into a collision course with the medium merchant (c2), so that it's bearing is constant:

My Course = 006° True...

http://img233.imageshack.us/img233/1355/constantbr1ey.th.jpg (http://img233.imageshack.us/my.php?image=constantbr1ey.jpg)

The target ship's AOB appears to be about 30° starboard...
I then apply the information to my combination "whiz-wheel"...

http://img142.imageshack.us/img142/7836/cb11fu.th.jpg (http://img142.imageshack.us/my.php?image=cb11fu.jpg)

My "whiz-wheel" consists of 3 layered wheels.
The Large wheel represents TRUE Compass.
The Middle wheel represents the Submarine.
The Small wheel represents the Target.

Now that I know the target's Bearing and AOB, they point to the target's TRUE Course of 095°.

I need to compute the target's speed to complete my firing solution, so I flip the whiz-wheel to the opposite side and use the circular slide rule.

http://img150.imageshack.us/img150/1007/cb20as.th.jpg (http://img150.imageshack.us/my.php?image=cb20as.jpg)

After plugging the info into the vorhaltrectner/TDC, I slow the boat to 1 kn. and wait for the target to reach about 70° AOB before pulling the trigger.

I might add here, that I never worry about RANGE.
Something I learned in the ACADEMY is, if the target (see above) fills 1/3 of the viewfinder in x1.5...you are within 1000m. So, whenever you get a sight picture like that (NO MATTER THE WEATHER)...you are close enough to kill.

Hope this made sense.

cheers,

[IronOutlaw]

Hi Linton!

Had a look at the image but it doesn't become any clearer with any of the software I have.

I might be able to recreate one if I can get the detail of what is written on the device. Do you have those details? If you do send them to HMSIronDuke@ozemail.com..au and I will see what I can do.

Cheers

[SubConscious]

Thank you all very much for your willingness to share this information. In my opinion, implements like this significantly increase the immersion of the game.

In truth, I don't even have Silent Hunter III yet. It's on order from Amazon and because I received free shipping on the order (the missus bought some children's books), I'm going to have to wait a bit. The best things in life are worth waiting for, right? ;)

I used to play Aces of the Deep many years ago on my old Pentium I 200Mhz. I've tried a couple of low-budget sub sims over the years, but was unimpressed. Nothing, at least in my opinion, compared to AotD. Everything I've read about SHIII, however, leads me to believe that my quest for a good sub sim may be over. I'm certainly excited about the prospect of manual targeting, thus my interest in this thread and subsequent registration on this forum.

Thanks again for posting this information!

David

[Linton]

Don1Reed would you be able to post some larger images so that I can make one.
Iron outlaw I wish i could tell you.I found the picture in undersea warfare magazine have a try manipulating their image and let me know how you got on.
Here's where I found it:
http://www.chinfo.navy.mil/navpalib/cno/n87/usw/issue_15/ekelund.html

[don1reed]

Linton,

Check your PM.

[don1reed]

Anyone wanting a copy of the WHIZ WHEELS can get them here:http://rapidshare.de/files/24562741/Whiz_Wheel.rar.html (http://rapidshare.de/files/24562741/Whiz_Wheel.rar.htmlCheers),
Cheers,

[Linton]

I shall be going out to the stationery store tomorrow to make my wheel.Thank you Don

[Puster Bill]

Might I kindly suggest to the mods to make this thread sticky?

[Puster Bill]

Thanks for that link Don. Here are the results of my efforts at building your amazing whiz wheel:

http://img142.imageshack.us/img142/4568/picture0072we.jpg

http://img100.imageshack.us/img100/6293/picture0081xg.jpg

Not exactly a professional job, but good enough. I used the same cardstock in my printer that I use for QSL cards, and I laminated both sides of each wheel individually. I laminated the outer wheels together, so that it is double-sided.

What I am wondering about (since I haven't had the opportunity to use it yet) is whether I should just pretend that meters = yards, or should I apply the correction?

[don1reed]

Great job, Bill.

If you have any thin, clear, plastic lamination lying around...you could make two excellent cursors for your whiz-wheel, one for each side (if you have not already done so). Make them long enough to span from the center pin to about 1/2 in. beyond the outter edge.

(Nice Rig, BTW :up: )

Math: I always convert Kilometers into Nautical miles-- Km x .54 = nm.

QSL card stock is the perfect size!

(73)

Don

[greyrider]

don reed wrote:

If you have any thin, clear, plastic lamination lying around...you could make two excellent cursors for your whiz-wheel,

actually, i piece of white thread, threaded from the underside of the wheel , in the center of the wheel,with a small needle works the best. the small knot at the end of the thread prevents the thread from poping thru the wheel, and makes a great bearing indicator.

this is a field expedient method. the thread should be long enough to reach alittle beyond the outer ring of the wheel.

[don1reed]

Good idea, Greyrider.

...in my days under the ruck, I used waxed dental floss on my protractor :)

[Puster Bill]

Great job, Bill.

If you have any thin, clear, plastic lamination lying around...you could make two excellent cursors for your whiz-wheel, one for each side (if you have not already done so). Make them long enough to span from the center pin to about 1/2 in. beyond the outter edge.

(Nice Rig, BTW :up: )

Math: I always convert Kilometers into Nautical miles-- Km x .54 = nm.

QSL card stock is the perfect size!

(73)

Don
Thanks. It's a Kenwood TS-520. Built like a battleship, and twice as tough. I've had it for about 15 years now and the tubes are still good. The key is a Chinese Army key. Again, built like a battleship. I mostly operate CW, except during things like Submarines on the Air and Museum Ships weekend when most of the operations are on SSB.

I've been thinking about laminating a piece of black thread for a cursor. What I would do is lay the thread on a piece of the lamination (on the sticky side, of course) Then lay another piece of lamination over it and cut it to suit. I can see the need for a cursor on the one side, but not necessarily on the Nasmith side, although I suppose it couldn't hurt. That is my next step.

By the way, that trick with the push pins is just about the best way to connect the wheels together.

[jmr]

Would be cool if we had some resident programming gurus to cook up an online whiz wheel.

[dertien]

Hey Don,

Where did you download that very nice compass I can see on your screenshot ?

thanks for sharing the link.

Don't forget that u-boat.reasimulation is down, so an alternative download (e.g. rapidshare ) would be quite nice.

thx

[don1reed]

That is an excellent MOD by FLB sale U-999

I believe you can still find it here:
'
http://rapidshare.de/files/11677312/...zeigen.7z.html (http://rapidshare.de/files/11677312/Slideout4Anzeigen.7z.html)

[dertien]

Much obliged Don, thx

[Mav87th]

Did anyone have any luck with making a Virtual Sliderule or the Wizzwheel in a virtual version...?

[Phoenix3000]

Hi, this is a great idea -

@don1reed - I clicked the link to get the whizzwheels, but it's no longer active - anyone know where they are located now?

Thanks all,

Px3000

[don1reed]

Try this site for "Build your own sliderule":

http://www.sphere.bc.ca/test/build.html

[Mav87th]

phonix i have it here if you want it in a mail.

What i was asking for was the virtual sliders - not how to make a real one (done that already)

[Phoenix3000]

@Mav87 - Hi, can you please email them, that would be excellent!:rock:

Here's my email:

phoenix_3_000 (at) yahoo.com

Replace (at) with @ - helps to stop the spammers!

Thanks a million!

Px3000