Dave Saxton wrote:In a four day operation in March 42, Tirpitz and two destroyers consumed 8,100 tons on fuel oil. This involves the fuel consumed by the DD's, and it doesn't tell us how much of that Tirpitz alone consumed, but it gives us an idea of how much fuel one modern BB and escorts could consume in ~96 hours of combat, or near combat operations. I believe that Tirpitz consumed more fuel at 18-19 knots than the Yamato and Iowa class consumed, but I'm not sure.
According to Tirpitz's War Diary, she left Trondheim at 1600 hours on 6 March supposedly with her tanks full.
At 0800 hours on the 8th her fuel (Heizöl) stores were 6,460 tons.
At 0830 hours on the 9th, just before the Albacore torpedo attack, she had 5,785 tons.
At 0800 hours on 13 March she still had 3,490 tons left (after having transferred 1,722 tons to several destroyers and torpedo boats in Bogen Bay on 10 March).
Based on trials, at 19 knots Tirpitz could steam for 8,870 nm, 6.963 nm at 24 knots, and 4,728 nm at 28 knots. Since her tank capacity was 8,297 tons, the fuel consumption can be easily calculated.
At 28 knots Tirpitz fuel consumption would be about 49 tons per hour. That means that in theory she could steam at 28 knots for a week before running out of fuel.
At 19 knots Tirpitz consumed 17.7 tons per hour.