Quote:
Originally Posted by CaptainNoob
Hi everybody!
I have a question about the historical speed measurement. Could the Uboats in WW2 actually measure their current speed? Or did they just know that a ceartain rpm setting correlates to a certain speed in optimal conditions? In other words: Is it realistic, that we can see our current speed in knots in the hud?
Cheers
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Hi CaptainNoob,
Yes, U-boats had a speed measurement system. There was a transmitter speed log in the control room, and a repeater in the tower. The system operated on the same principles as pitot tubes on aircraft. I put the following deck together, hopefully it’s helpful. The system was identical on all boats. Should also be noted that that gives you speed through the water, and not speed over ground.
As far as the engine and motor room crews were concerned, they were setting based on RPM, with charts available to them to show the number of RPMs that corresponded with the particular telegraph order. They were not as concerned about speed, that was only visible in the control room and the tower.
https://docs.google.com/presentation...qHPdZyEfg/edit