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TorpX · 10-28-13, 08:57 PM

I was going to post this before, but it slipped my mind. I've tested this method with the Mk. 10 torpedo with the S-18 class, and the Mk. 14 with the Porpoise class. Most of the testing was done with the S-18, but, as the torpedo turning radius and reach seem to be the same, I didn't have to start from scratch. I may calculate the relevent figures for other torpedo combinations down the road.

Mk. 10 torpedo and S-18 (default):

tube distance_______85 ft.
torpedo reach______343 ft.
turning radius______310 ft.
luanch lag_________ 2.8 sec.

Mk. 14 torpedo and Porpoise:

tube distance_______112 ft. (bow)______136 ft. (stern)
torpedo reach_______343 ft.
turning radius_______310 ft.
luanch lag__________ 4.0 sec.

Arriving at these figures involved a great deal of time consuming, tedius work. It wasn't hard to obtain approximate values, but I wanted to get the most accurate figures possible.

Unfortunately, the different methods I was using didn't seem to agree. After much fruitless effort, I decided to toss out the provisional values I was using and start over. This time, I first took the trouble to tabulate the actual bearing angle that the periscope is pointed to. This was necessary because the angle indicated on the index ring is not the true angle. The number of pixels between the degree marks is not the same. On most of the dial, there are 3 pixels between marks, but on some there are only 2. Anyway, I tabulated the number of pixels from 0 to 360 so I could make my computations on the basis of the true angle. [I assume that the number of pixels and the accuracy of the index bearing ring will depend on the mods you have and your display resolution. I was using RFB here as I wanted to make use of the individual degree marks, and the stock game only has marks every 5 degrees.] After all this, the different methods used to estimate the torp performance values agreed pretty well.

My intuitive estimate of the error is that the torp turning radius is probably within 5 or 6 ft. of the true value, and the torp reach is within about 10 or 15 ft. If someone happens to know what values the game uses; please don't hesitate to speak up.

10-28-13, 08:57 PM	#1
TorpX Silent Hunter Join Date: Sep 2010 Posts: 3,975 Downloads: 153 Uploads: 11	I was going to post this before, but it slipped my mind. I've tested this method with the Mk. 10 torpedo with the S-18 class, and the Mk. 14 with the Porpoise class. Most of the testing was done with the S-18, but, as the torpedo turning radius and reach seem to be the same, I didn't have to start from scratch. I may calculate the relevent figures for other torpedo combinations down the road. Mk. 10 torpedo and S-18 (default): tube distance_______85 ft. torpedo reach______343 ft. turning radius______310 ft. luanch lag_________ 2.8 sec. Mk. 14 torpedo and Porpoise: tube distance_______112 ft. (bow)______136 ft. (stern) torpedo reach_______343 ft. turning radius_______310 ft. luanch lag__________ 4.0 sec. Arriving at these figures involved a great deal of time consuming, tedius work. It wasn't hard to obtain approximate values, but I wanted to get the most accurate figures possible. Unfortunately, the different methods I was using didn't seem to agree. After much fruitless effort, I decided to toss out the provisional values I was using and start over. This time, I first took the trouble to tabulate the actual bearing angle that the periscope is pointed to. This was necessary because the angle indicated on the index ring is not the true angle. The number of pixels between the degree marks is not the same. On most of the dial, there are 3 pixels between marks, but on some there are only 2. Anyway, I tabulated the number of pixels from 0 to 360 so I could make my computations on the basis of the true angle. [I assume that the number of pixels and the accuracy of the index bearing ring will depend on the mods you have and your display resolution. I was using RFB here as I wanted to make use of the individual degree marks, and the stock game only has marks every 5 degrees.] After all this, the different methods used to estimate the torp performance values agreed pretty well. My intuitive estimate of the error is that the torp turning radius is probably within 5 or 6 ft. of the true value, and the torp reach is within about 10 or 15 ft. If someone happens to know what values the game uses; please don't hesitate to speak up.