Diesel Kriegsmarine

BlondieBC

Banned
Battle of Narvik (April 9th to April 10th 1940)




The result was the complete destruction of the British destroyer force and the sinking of two German destroyers Z1 and Z21 along with heavy damage to a third the Z18. With the destruction of HMS Hardy Captain Warburton-Lee was killed and also Kommodore Bonte when Z21 was lost.

The aftermath of Battle of Narvik and other naval actions off Norway had a profound effect on the Royal Navy. To all appearance the Kriegsmarine had Narvik heavily defended and it wouldn’t be known till after the war just how short fo fuel and munitions the Germans really were. For now with German U boats proving themselves a menace and Narvik lost the British withdrew from Norwegian waters.

***
Side commentary not going into any depth on just how much more damage the Germans would do with functional magnetic detonators; enough to get the British to leave as all I will say.

Is the death of these men significant to your ATL or are you adding the names for color?
 
Is the death of these men significant to your ATL or are you adding the names for color?

Historic deaths at Narvik.

As to completion speed German yards were over taxed and I have done nothing to aleavate issue. Other than moving dates up I was unwilling to alter times. Destroyers Germans are building two types of DDs steam and diesel which is hardly production efficient.


Michael
 
Operation Rheinübung Part 1, (May 18th to May 21st, 1941)
Operation Rheinübung Part 1, (May 18th to May 21st, 1941)


With the Kriegsmarine at its greatest strength yet the Germans planned on a major operation to do nothing less than shutdown all Atlantic trade. In France was Battlegroup Ciliax made up of the two battleships Scharnhorst and Gneisenau. In Germany was the far more powerful Battlegroup Lütjens made up of the battleships Bismarck and Tirpitz, the heavy cruiser Prinz Eugen and the aircraft carrier Graf Zeppelin. For Bismarck this would be her second war cruise as her sortie as part of Operation Berlin the previous year had ended early when she was torpedoed and forced to return to Germany for repairs. For the other major ships this would be their first operational mission. High hopes were placed on the success of this mission by Großadmiral Raeder.

When Battlegroup Lütjens left Gotenhafen (Danzig) on May 19th it was escorted by three steam powered destroyers. On the 20th as the battlegroup was traversing the Kattegat between Denmark and Sweden a Swedish cruiser encountered the Germans. The following message was sent to Stockholm and intercepted by the British, “Four large ships, three destroyers, five escort vessels, and 10–12 aircraft passed Marstrand, course 205°/20.” An attempt by the British to scout Bergen to locate the German battlegroup came to nothing as a Combat Air Patrol from Graf Zeppelin shot down RAF Spitfire piloted by Flying Officer Michael Suckling as he attempted to scout the fjord. In Bergen the steam powered destroyers were exchanged for the diesel-powered destroyers Z7, Z18, Z19 and the newly commissioned Z27.



In Scapa Flow Admiral Tovey was in a quandary as to what to do as from early radio intercepts the makeup of the German force was most likely Bismarck, Tirpitz, Prinz Eugen and Graf Zeppelin. The problem is they had time and time again received reports of the German carrier in the Baltic, in Norway and some times even in France! The confusion was caused by the Luftwaffe’s habit of stealing Trägergruppe 186 for other operations. It was not always clear from intercepts if it was Trägergruppe 186 or Graf Zeppelin or both. Plus, four heavy cruisers the Deutschland, Admiral Scheer, Admiral Hipper and Seydlitz where known to be in German yards for repair and or refit. Was the forth ship reported by the Swedish the Graf Zeppelin or one of the other German cruisers released from the yards? Still all sings pointed to a major breakout by the Kriegsmarine into the Atlantic. After much debate Admiral Tovey dispatched Prince of Wales, King George V, Hood and an escort of six destroyers under Admiral Holland for the Denmark Straights.


After topping off their bunkers Battlegroup Lütjens left Bergen for the Atlantic in the evening of the 21st. Admiral Lütjens planned to make use of the Denmark Straights as he had in previous breakout attempts into the Atlantic.



To be continued…
 
Cool update,
British carriers?
Why all British heavies fro Denmark Strait?

HMS Ark Royal with Force H at Gibraltar is nearest ready carrier.

As to the heavies its what they did historically I see little reason to change Admiral Tovey's reaction beyond sending another fast BB (King George V).

Michael
 
HMS Ark Royal with Force H at Gibraltar is nearest ready carrier.

As to the heavies its what they did historically I see little reason to change Admiral Tovey's reaction beyond sending another fast BB (King George V).

Michael
But what is covering the faroese gap?
 
Historic deaths at Narvik.

As to completion speed German yards were over taxed and I have done nothing to aleavate issue. Other than moving dates up I was unwilling to alter times. Destroyers Germans are building two types of DDs steam and diesel which is hardly production efficient.


Michael


The problem- according to Raeder in 1937 -was building schedules were crippled by Hitler redirecting much needed steel shipments to the army instead of the ship yards . Raeder complained the average warship was 11 months behind schedule with some only 3 months [ TWINS & DD] , while the carriers were 22 months behind schedule. Much of this shortfall was made up by 1940, but by then the damage had been done, since the war demanded all future naval construction focus on MINEBOOT /DD/GTB & MOST IMPORTANT; U-BOATS.
 
...

The first major achievement was the salvage of the MAN 6-cylinder diesel 12,000 hp being constructed for dreadnoughts of the German Navy.
...

The Inter-Allied Commission of Control ordered the MAN diesel destroyed as it was intended for the incomplete Dreadnought Battleship SMS Sachsen which was at Germaniawerft yard in Kiel. MAN, and the Naval Design office were not particularly interested in nearly 8 years of effort to end up cut into scrap with nothing to show for it. First MAN tried reason pointing out that the engine could be used for something else with no military application. The Commission was at first reluctant but after pointing out that Large Torpedo Boats of the 1918Mob class were being converted into merchant ships at last approval was granted.

The MAN diesel was installed in a newly designed bulk freighter, Wolf. Because of post war economic problems Wolf didn’t enter service till 1923, 14 years after the engine was first conceived of.

The engine was much larger than WOLF required so most of the time it was run 50% of its rated power of 12,200 SHP. Over the next several years a great deal was learned about the problems of running such a large and powerful diesel engine.
...
The highlightened ... POD or OTL ?
 
Look for an article called 'Diesel Engines for Battleships 99 years ago' you can find the full history of it there.

Michael
 
Operation Rheinübung Part 2, The Battle of Denmark Straights (May 24th, 1941)
Operation Rheinübung Part 2, The Battle of Denmark Straights (May 24th, 1941)

Evening of the 23rd the German Battlegroup detected first one and then a second trailing ship. Radio intercepts identified the ships as Royal Navy heavy cruisers HMS Norfolk and HMS Suffolk. Lütjens made repeated efforts to drive off or sink the enemy cruisers but to no avail. With their position reported there were but two choices press ahead or turn back Lütjens elected to press ahead. To allow contact to be broken in the early hours of the 24th Lütjens ordered the Graf Zeppelin to prepare an anti-shipping strike scheduled for dawn, 3:45 AM on the enemy cruisers.

The first up where Gruppe 3 and 4 the Fi-167 equipped with torpedoes. Then Gruppe 5 and 6 with the Ju-87s carrying armored piercing bombs. Oberstleutnant Walter Hagen the commander of Trägergruppe – 186 requested that his strike aircraft arrive together in one large mass. Lütjens left the air strike details in the hands of the Luftwaffe officer and by 4:40 AM the four gruppe were assembled and on their way with their Bf-109 escorts.

The arrival of German aircraft badly shocked Admiral Wake-Walker on Suffolk despite Graf Zeppelin presence being a possibility. Hagen attempted to have the torpedo bombers and dive bombers attack together but the result ended up being disjointed. The Gruppe attacked over a period of five minutes. At the end of which one Fi-167 had been shot down, five more Fi-167 damaged and four Ju-87s damaged. Norfolk was hit by one torpedo that broke the back of the heavy cruiser and Suffolk was hit by multiple SC-500 AP bombs (1,100 lb) that left the cruiser burning.

At the same time as the battle with the British cruisers was reaching its height the hydrophone station on board Prinz Eugen reported the following, “Noise of three fast-moving turbine ships at 280° relative bearing.”

With the threat to his rear eliminated Lütjens pressed ahead to clearly identify what the threat to the south was. It would be some time for the German carrier to recover her aircraft and prepare another attack. Z-7 hung back with Graf Zeppelin while the other destroyers pressed ahead with the heavy ships.

With the destruction of Suffolk and Norfolk Admiral Holland sensed an opportunity to bring the Germans to a gunnery action before their carrier could be ready for another air battle. It was either that or withdraw as Task Force H with HMS Ark Royal was far to the south escorting a convoy out of Gibraltar. Staying within range of German carrier and allowing it to pound his squadron with impunity was clearly the worst possible option.

The two forces soon came into range of one another. At 5:52 AM the British opened fire and the Germans returned fire at 5:55 AM. Sea conditions prevented either the German or British destroyers from taking any meaningful part in the battle to come until the end stage. The German formation was Bismarck, Tirpitz and Prinz Eugen while the British line was Hood, King George V and Prince of Wales. The respective ships each engaged their opposite numbers. Also, the two squadrons angled into one another to close the distance as quickly as possible. For the British’s this meant they could only fire with their bow weapons while the Germans could fire full broadsides.

Despite the King George V drawing first blood with a hit on Tirpitz it was Bismarck that got the first kill. Just after Admiral Holland ordered a turn to unmask his rear batteries HMS Hood was twice around the mainmast at 6:00 AM. Moments after the hit on Hood a tower of orange and yellow flame rocketed into the sky and Hood disappeared in a smoke cloud.

At once King George V turned to avoid the wreck of Hood and in turn so did Prince of Wales. Captain Patterson on King George V assumed command of the squadron and like Admiral Holland he had but two choices continue the engagement or break off. With range now 14,000 yards Patterson elected to continue the battle and resumed previous course. It was several minutes before Captain Leach on Prince of Wales was able to inform Patterson that his ship was experiencing serious mechanical problems with his guns. Lütjens ordered his ships to redistribute their fire with Bismarck engaging King George V, Tirpitz Prince of Wales and Prinz Eugen Prince of Wales. Only Bismarck changed its fire which left both German battleships firing on King George V.

Between 6:00 AM and 6:10 AM the range dropped to 10,000 yards. During that time King George V was hit 9 times by the German battleships. The most serious hit was on A turret resulting in its destruction as splinters set off ready charges and burning out the turret; this hit occurred at 6:09.


At 6:10 a torpedo salvo from Prinz Eugen arrived hitting Prince of Wales once amidships.

With the engagement clearly going against him Captain Patterson ordered the battle broken off. Both King George V and Prince of Wales turned hard over and began laying smoke.

On Bismarck a brief debate occurred between Captain Lindemann and Admiral Lütjens. Before Hood’s destruction she had failed to hit Bismarck at all and since wasn’t even targeted. To Lindemann his ship was fully combat capable and two enemy battleships were fleeing in obvious distress. The rear King George V ship’s fire was erratic and had been dropping off all engagement. The forward King George V ship had clearly taken a bad hit. It was obvious choice to the German Captain, close in and finish the British. Lütjens it was far more complex of a situation Tirpitz had been hit several times, turret Dora was out of action and the squadron had to slow because of her damage. Prinz Eugen while doing yeoman work engaging an enemy battleship had been hit three times in turn; reporting flooding in her bow. The news of the Torpedo hit on Prince of Wales ended the debate, the Germans would press the engagement.

From the bridge of King George V, the report of the German ships turning to follow him was ominous. The Germans clearly sensed blood and were moving in for the kill. Worse Y turret on Prince of Wales was now totally out of action and she couldn’t fire back at all with the squadron heading directly away from the Germans. The only saving grace was that the Germans could now only fire with their bow weapons. Multiple fires had been started from all of the 128mm hits from the German secondaries.


With the radical course change by the British and Germans no hits were achieved for several minutes as gunnery solutions were lost. Just as the Germans once again found the range the British destroyers arrived and began an attack on the German squadron. The German destroyers moved to meet their opposite numbers and the large German ships broke off the engagement. At 6:23 the battle was functional over.


The result of the destroyer engagement was little more than to end the battle. On the German side Bismarck was unscathed while Tirpitz had been hit seven times by 14” shells with flooding reducing speed to 25 knots and gun turret D out of action. Prinz Eugen had been hit three times by 14” shells, her captain was confident he could make good repairs. On the British side Hood was lost, King George V had been hit fifteen times by 15” shells loosing A turret, both primary fire control stations, a 5.25” mount destroyed by a 15” shell that failed to explode and numerous other damage that caused fires and flooding. Prince of Wales had been hit by Prinz Eugen six times with 8” shells that caused various minor damage including fire and flooding and of course a 21” torpedo that that was causing flooding in boiler room B. The boiler room was functional on Prince of Wales but anything above 20 knots increased the flooding. Various mechanical problems made it questionable for Prince of Wales main armament.

Captain Patterson reported that neither battleship was combat ready and he was withdrawing. Admiral Lütjens decided that Tirpitz was to return to Norway but the rest of the task-group would continue. The battle had used up 40% of Bismarck’s munitions. By 10:30 am Graf Zeppelin reported the its aircraft were ready for another mission.

***
 
So neither side's destroyers suffered worse than light damage? To be frank I am more interested in what comes next.
 
So neither side's destroyers suffered worse than light damage? To be frank I am more interested in what comes next.
I believe Bismarck IOTL was on an intercept route for a large troop convoy. Should not be hard to locate with GZ in the group.
 
WS-8B was at sea, heading from Clyde to (initially) Freetown. Five of its escorting destroyers detached from the convoy and intercepted Bismarck.

HMS Argus was with it, but she seemed to have had only three Martlets for defence - presumably the Hurricanes she was ferrying were crated or partially disassembled.

WS 8B
A smaller convoy, sailing from the Clyde 22.5.41 as below:
CHRISTIAAN HUYGENS
GEORGIC
DUCHESS OF RICHMOND
ORDUNA
ABOSSO
MARTAND
ALMANZORA
HMS ARGUS

Local escort was provided by the AA cruiser CAIRO and destroyers COSSACK, ERIDGE, MAORI, OTTAWA, PIORUN, SIKH, RESTIGOUCHE and ZULU from 22 to 26.5. The aircraft carrier ARGUS was with the convoy for passage to Gibraltar, detaching 27.5, and the cruiser EXETER provided the ocean escort.
 
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