SUBSIM Radio Room Forums - Any interest in an IS-WAS for SH3?

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- Silent Hunter III (https://www.subsim.com/radioroom/forumdisplay.php?f=182)

- - Any interest in an IS-WAS for SH3? (https://www.subsim.com/radioroom/showthread.php?t=113591)

Awesome work Hitman. :up::up::up::up:

The only downside that I can see is that you are going to need the target to shift at least 6 degrees of bearing between range marks (a problem with any rule that doesn't have an ST scale).

The current rule I am using (A pocket sized Pickett N200-ES Trig) has both an S and an ST scale. I had to use the ST scale yesterday on a slow moving target, because the angle they had moved between my range marks was 5 degrees. I didn't need it to find the AOB, but distance target travelled. I was using 100 second intervals for my marks so that I could skip the meters travelled/seconds calculation. It just made the math easier.

For the AOB calculation you'd only need an ST scale if the target was coming pretty much directly at you or directly away from you.

Still, the US version didn't have an ST scale, so I wouldn't include it.

We just have to be aware that apparent target motion will have to equal at least 6 degrees to get a target distance 'distance travelled', so that we can calculate speed.

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I definitely would like to help provide you some return for the hard work that is going into the design and eventual production of the wheels.

If it finally goes into production, it will be a product completely for the support of subsim.com running costs. I do not want a single cent of it, like I already did with the PA mod. All those things are simply ways of contributing keeping this excellent site up and running. Hosting costs exceed 500$ a month:o and in months when donations or sales via the store do not reach that, the rest comes out entirely of Neal's own pocket:88) Thank you anyway for your interest and support:up:

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The only downside that I can see is that you are going to need the target to shift at least 6 degrees of bearing between range marks (a problem with any rule that doesn't have an ST scale).

Yes, as you say that seems to happen also with the MK3 US sub attack course finder. Probably the less than 5 degress moving targets were neglected due to their low speed making them much easier to hit.:hmm:

Thank you sir, premature I know but my CC is at the ready!:up:

Wilcke

....and probably the last update prior to a formal release, so anyone can comment and say what could be improved:up:

http://img510.imageshack.us/img510/6...previewwv3.jpg

Hot damn I can't wait for it!

Looks good to me. Can't wait to be in wizzwheel heaven.:up:

One small suggestion: Make a version of the inner wheel without the swastika, for the benefit of our bretheren in countries where that is verboten.

It looks great Hitman!

:rock:

Nice work! Have a question about how to using this wheel, is this described in Paul Wasserman's guide? I'm now using the 90degrees rule, and tried the wheel method (From Wazoo moanual) long time ago, the only thing I dislike is that eels hit the target in middle of ship always. The thing I like in 90degrees rule is to I may to decide where I want to hit the boat. Is there a chance to use this wheel and also decide where torpedo will hit? Maybe I'm wrong in whole thing about It, and looking for someone tell me a short user guide and possibility of this mod! Thanks.

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is this described in Paul Wasserman's guide?

AFAIK it has no relation with Wazoo's excellent tutorial. The purpose of this tool is to get target course, bearing and speed from scope observations WITHOUT any need to plot anything in the map.

The wheel has already been released, check the topic in this very same forum:up:

where is download?

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Originally Posted by Hitman

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is this described in Paul Wasserman's guide?

Sorry, but I cannot find where to d/l with wheel. :oops:
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http://tarafoundation.org/frauleinvomAmtsm.jpg

I downloaded it ... Thanks very much for your effort Hitman :up:

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Originally Posted by Hitman

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Any chance of a quick step by step guide to using the reverse side of your ISWAS? (The one for finding target speed etc) ?

You have the tutorial in the HNSA site, but here's a quick explanation. It works like a charm if you did have a good AOB estimate (You can use my aspect ratio method) and only needs ONE observation if you have sonar contact:

1.- Raise scope, identify target, get range, guess AOB (Or calculate it based on aspect ratio), let's say you had: Bearing 50, Range 3000 metres, AOB 40 port. Start stopwatch.

2.- Turn the wheel to the back side. Align the "40" of the middle wheel with 3000 yards on the outer wheel ("Final range yards" scale).

3.- Get a new bearing, either by raising scope or by sonar periodical report. Let's say you now have the target at bearing 30. That is a 20 degree difference to the previous 50, right? Stop the chronometer now. You have recorded 1 minute and 10 seconds, for example.

4.- Without moving the wheel and leaving it exactly as you set it up in step 2 (Middle wheel at 40 aligned with outer wheel at 3000), take a look at the middle wheel at its "20" mark (Number of degrees the target has moved). It aligns with 1600 yards in the outer wheel, correct?

There you have it: In 1 minute and 10 seconds, the target has moved 1600 yards. Now to convert that to knots, move the inner wheel ("Time in minutes") until the 1-10 mark (Below the big 12) aligns with those 1600 yards of the outer wheel -and now also with the 20 degrees in the middle wheel- . The result can be read in the most outer ring (Speed in Knots) and is marked by the inner wheel arm. It should be showing now 4.1 Knots. Congratulations, you have now the speed:up:

Hope that helps:know:

I have printed out your excellent wheels, assembled them (I presume that the front wheels and the back wheels can be assembled as seperate entities) and followed the examples for 'Course Finder' as in the HSNA doc. All well and good. I now tried to follow your 'quick instruction' as to estimate speed. I find however that I cannot discover where the "40" and "20" are located on the middle wheel, nor can I locate the 4.1 knots on the most outer ring. Should this not be the center ring on the middle wheel as this is the only place which bears any resemblance to '4.1'. Sorry if these sound a little silly but I am totally confused. :damn: :damn:
Perhaps if you have the time a pictorial description would help.
BTW many thanks for all your trouble in this area, great job!

OK, either I am going nuts, or a few posts have disappeared. :hmm:

If the pics I posted were too big, my apologies.

EDIT: Oops, I was looking in the wrong thread.