Bearing change tables for speed

[Elphaba]

Thank you

May I also point out the size / scale of the first table could be bigger to match the size / scale of the second table - it would minimise wasted space when printed out (smaller borders too?) and make reading everything clearer when on a computer screen, where everything can be the same size.

Thanks for everything you've been doing to contribute to the game and community btw.

[derstosstrupp]

Edited OP to include a link to an Excel file I created that does the number crunching for you!

It is read-only so don't rely on it too much in a pinch (kidding, just download a copy for yourself - File, Download As, Excel).

[derstosstrupp]

Originally Posted by Elphaba

Thank you

May I also point out the size / scale of the first table could be bigger to match the size / scale of the second table - it would minimise wasted space when printed out (smaller borders too?) and make reading everything clearer when on a computer screen, where everything can be the same size.

Thanks for everything you've been doing to contribute to the game and community btw.

Made some edits - the size of Table 1 is a bit bigger, but will be smaller due to the fact that I want to keep these printable to 8x11 letter size paper for reference. Edited instructions as well. Check out the Excel file I just added too - that's also an option.

[Elphaba]

That's brilliant; thank you!

[Pisces]

Derstosstrup, do you have templates for those slideruler disk for Auswanderungsverfahren and Ausdamphverfahren? I feel a creative urge coming up.

And once I figure them out, I might even redraw them in CAD software.

[derstosstrupp]

Originally Posted by Pisces

Derstosstrup, do you have templates for those slideruler disk for Auswanderungsverfahren and Ausdamphverfahren? I feel a creative urge coming up.

And once I figure them out, I might even redraw them in CAD software.

No problem I’ll see what I can track down.

[Pisces]

Ok, in the mean time I had another run through of your documents and the tvre.org site explanation of Auswanderung and Ausdamphverfahren. Seems very do-able to recreate these. However, is it me or does "Drawing 21. Rundschieber für Auswanderungsverfahren “B” [12]" have crooked scales? 170 hm distance with 2.5 degree bearing change should show 24 nm/h (according to conversion factor 6000/1852) instead of 23. When I compare different marks each takes another value for meters per nautical mile. Same goes for Drawing 22. Not to German standards if you ask me.

[derstosstrupp]

Originally Posted by Pisces

Ok, in the mean time I had another run through of your documents and the tvre.org site explanation of Auswanderung and Ausdamphverfahren. Seems very do-able to recreate these. However, is it me or does "Drawing 21. Rundschieber für Auswanderungsverfahren “B” [12]" have crooked scales? 170 hm distance with 2.5 degree bearing change should show 24 nm/h (according to conversion factor 6000/1852) instead of 23. When I compare different marks each takes another value for meters per nautical mile. Same goes for Drawing 22. Not to German standards if you ask me.

I agree. When I made my wheel used those images and I did notice that too, some results differed (albeit slightly) from the actual math. It must be an issue with the website creator’s scan. He appears to have had KM doctrine books in his possession and maybe the scan from the book was a bit distorted.

I suppose one could recalibrate the wheel, that’s beyond my capabilities at the moment!

Been using my excel file instead as my wheel needs some repair.

[derstosstrupp]

OK folks, another update to this file - I have added a tab for Ausdampfverfahren (method of calcing speed by achieving a constant bearing to target, then deriving target speed from own speed, that bearing, and AOB). I've been playing around with this method in WP while overtaking targets, and it works very well.

The long and short - While overtaking, pick a ship and a feature on that ship and adjust speed (use the 10 slower function on the EOT too!) so the bearing moves only a little, then fine-tune with course adjustments until the bearing line in the UZO stays on that spot on the ship over at least a couple minutes. Then, without moving the UZO:

1. Note the exact bearing per the TDC to the 10th of a degree.
2. Note exact own speed to the 10th of a knot.
3. Estimate the ship's AOB.

Input these values into the "Ausdampfen" tab and it will calc the target's speed.

Obviously the initial AOB estimate will likely be inaccurate - as the approach unfolds, you will be able to refine his course and thus will be able to "go back" and adjust the initial AOB (and thus the speed estimate) accordingly.

Please let me know if that doesn't make sense!

[Pisces]

I would say, being at parallel course initially, reduce speed first with the 10 slower option of the EOTs. Then turn in to fine adjust to constant bearing. Else you turn in with a larger angle and close too quickly.

[derstosstrupp]

Originally Posted by Pisces

I would say, being at parallel course initially, reduce speed first with the 10 slower option of the EOTs. Then turn in to fine adjust to constant bearing. Else you turn in with a larger angle and close too quickly.

I agree. I’ve been having success by first turning roughly parallel, dropping 1-2 EOT settings/10 slower until bearing barely moves, then fine-tuning course by turning 5-10 deg away at a time. You are right that the key is to reduce speed as much as you can to minimize the amount of course adjustments you do.