[REL] We Dive at Dawn

[Hitman]

I have found the problem with the dials, apparently (Must confirme with deeper testing) WDAD when selecting "Authentic" measurement assigns metric to the british boats

Now the correct, reworked dials are showing:

[keltos01]

Originally Posted by Hitman

I have found the problem with the dials, apparently (Must confirme with deeper testing) WDAD when selecting "Authentic" measurement assigns metric to the british boats

Now the correct, reworked dials are showing:

a true beauty !!!

[Hitman]

We'll need zero Gyro Angle torpedoes (Locked instead of limited to 15º) to go along with this mod

I have figured out how to get both the periscope lead angle and alternatively the moment of shooting. For the first one, you need to enter all target data into the TDC and NOT start the position keeper. Once the data are fed, the difference in degrees between the arrow in the lower dial (Gyro Angle arrow) and the line of sight (upper part of the dial) is the necessary lead angle, so you just need to turn your scope that many degrees in direction to your target and shoot when it crosses the periscope line. For the second, you would simply follow the target until the arrow matches the bow of the ship silhouette on it, at that moment the necessary Gyro Angle is zero and your torpedo will find the target.

Gotta love how frigging challenging it was to hit anything at all with those WW1 methods

[Forensicman101]

As long as you are attacking the target so that your torpedoes are striking at 90 degrees off the target's bow the calcuations are quite straightforward with a bit of basic trigonometry (I've included a table for this in my "Double Whammy" document). e.g. a 45.5 kt torpedo being fired at a 12 kt target would have to be fired when the target was approximately 15 (actually 14.8) degrees off the submarine's bow in such circumstances. As always, the trick is to remember that you're not firing at a target, but at where the target will be when your torpedo arrives at the same location. I guess the real difficulties arise when the point of intercept is greater or less than 90 degrees. I suppose that's where the fruit machine comes into play.

[Hitman]

I guess the real difficulties arise when the point of intercept is greater or less than 90 degrees. I suppose that's where the fruit machine comes into play.

Exactly. And to be more specific, the british captains, like the US ones, favoured a track angle of 110 degrees (Better ask Rockin Robins why, I don't remember right now) and usually asked the TDC operator to provide an attack course for that track angle.

[keltos01]

the British torpedoes could be set at either 0 or 90° angle, nothing between.

unfortunately I don't think SH4 can support two set giro angles, so we'll have to go with 0° only...

keltos

[Hitman]

It could support both GA, but I have never seen a record of a 90º shot, they did the vast majority as 0º degrees shots. There are several reasons why you would do that, but the main one is that the lack of parallax (convergence) means that distance to target is largely irrelevant, something that eliminates a variable from the problem and makes shooting easier.

[joegrundman]

Originally Posted by Hitman

Exactly. And to be more specific, the british captains, like the US ones, favoured a track angle of 110 degrees (Better ask Rockin Robins why, I don't remember right now) and usually asked the TDC operator to provide an attack course for that track angle.

At 110 degrees (or thereabout, actually it is a function of target and torp speed), the rate of change of target AOB is slowest.

[keltos01]

[QUOTE=Hitman;1559430]We'll need zero Gyro Angle torpedoes (Locked instead of limited to 15º) to go along with this mod
not a problem !!!

I have figured out how to get both the periscope lead angle and alternatively the moment of shooting. For the first one, you need to enter all target data into the TDC and NOT start the position keeper. Once the data are fed, the difference in degrees between the arrow in the lower dial (Gyro Angle arrow) and the line of sight (upper part of the dial) is the necessary lead angle, so you just need to turn your scope that many degrees in direction to your target and shoot when it crosses the periscope line. For the second, you would simply follow the target until the arrow matches the bow of the ship silhouette on it, at that moment the necessary Gyro Angle is zero and your torpedo will find the target.

Gotta love how frigging challenging it was to hit anything at all with those WW1 methods

I'll quote "submarine commander" by rear admiral Ben Bryant on that tomorrow..

sheer luck and a seaman's eye was what he said !

keltos

[keltos01]

Originally Posted by Hitman

I have found the problem with the dials, apparently (Must confirme with deeper testing) WDAD when selecting "Authentic" measurement assigns metric to the british boats

Now the correct, reworked dials are showing:

Hitman,

I know you hit a rock with the mod but even the one showing here above adds to the immersion factor that we are in a British sub !

I want it for the T Class mod and I think we should add it to WDAD too.

can you send me what you have ?

regards, (gosh I always write that )

keltos

[Hitman]

Don't worry I have not abandoned it. I just want to make teh graphics the better possible, the picture above is unfinished yet.

I will do the replacemente graphics, as they don't need menu editing. It's a full rework of the slide out TDC -with menu editing- what I can't do, so that will have to be shelved or wait until someone else can do it.