Search found 919 matches

by Thorsten Wahl
Wed Mar 30, 2011 7:46 pm
Forum: Hypothetical Naval Scenarios
Topic: Bismarck vs. Iowa
Replies: 322
Views: 85646

Re: Bismarck vs. Iowa

Thanks for info on wear of German 15 guns: none of the sources I have contain anything at all on wear. A 10% drop in MV corresponds to a lower limit of about 2420 ft/s, so that average MV might have been quite close to the average figure of 2575 ft/s for the British 15 in gun when supercharged. I a...
by Thorsten Wahl
Fri Mar 25, 2011 6:53 pm
Forum: Hypothetical Naval Scenarios
Topic: Bismarck vs. Iowa
Replies: 322
Views: 85646

Re: Bismarck vs. Iowa

The Germans also found that they needed to restrict the hardness of the front of the shell somewhat to ensure intact penetration with a still functioning fuze. not only the germans british research on optimal hardness of cap/projectile brought conflicting requirements regarding hardness at low and ...
by Thorsten Wahl
Fri Mar 25, 2011 6:36 pm
Forum: Naval Technology
Topic: Battleship Vanguard Armor
Replies: 65
Views: 93294

Re: Battleship Vanguard Armor

It talks about "unsteadiness of shells", tests having to be repeated, and shells going through "jump cards" before striking the plate. "Unsteadiness' sounds like yaw.
Due to shooting with reduced charge also the spin of projectile became decreased.
by Thorsten Wahl
Thu Mar 24, 2011 8:17 pm
Forum: Hypothetical Naval Scenarios
Topic: Bismarck vs. Iowa
Replies: 322
Views: 85646

Re: Bismarck vs. Iowa

The difference in weight isn't going to make much difference vs cemented armour as the more important factor is velocity.
dave do you have a source?
Seems to me the formula used for Unterlagen zur Bestimmung Hauptkampfentfernung was using the energy aproach.
by Thorsten Wahl
Thu Mar 24, 2011 8:09 pm
Forum: Military History and Technology
Topic: When did ships first use cannon?
Replies: 5
Views: 16026

Re: When did ships first use cannon?

during the first dansk - hanseatic war 1362-65,
Christoffer son of the dansk king Waldemar IV. Atterdag was killed in action by a cannonball on 11th of june 1363 during a sea fight
by Thorsten Wahl
Tue Mar 22, 2011 8:29 pm
Forum: Naval Propulsion
Topic: Fuel consumption Bismarck
Replies: 74
Views: 61259

Fuel consumption Bismarck

just a question KBismarck states following Fuel: 8,294 metric tons Range: 9,280 nautical miles at 16 knots 8,900 nautical miles at 17 knots 8,525 nautical miles at 19 knots 6,640 nautical miles at 24 knots 4,500 nautical miles at 28 knots what is the source of this data is it known at wich rpm / hor...
by Thorsten Wahl
Mon Mar 21, 2011 8:38 pm
Forum: Hypothetical Naval Scenarios
Topic: Bismarck vs. Iowa
Replies: 322
Views: 85646

Re: Bismarck vs. Iowa

ballistic mortar of Schießwolle 36 was about 130 with TNT =100

similar compositions were also used in german bombs like Fritz X
by Thorsten Wahl
Wed Mar 16, 2011 8:06 pm
Forum: Naval Weapons
Topic: Plunging fire
Replies: 22
Views: 28945

Re: Plunging fire

Flight time at 3 km is ~4 sec, I suspect its a direct shot, height of trajectory shouldnt exceed 15 m or so. danger space estimated ~360 m. It should be real hard to miss the target. probability for a hit can be expcted ~90% for a hit at main belt ~25% upper belt ~25% remainder superstructure but ge...
by Thorsten Wahl
Thu Mar 10, 2011 5:14 pm
Forum: Naval Weapons
Topic: Plunging fire
Replies: 22
Views: 28945

Re: Plunging fire

While I believe that the the German system of protection was extremely effective at close range as you describe, there is historic evidence that the Germans themselves were more pessimistic. They only communicate the calculated worst case scenario. They took only the available energy into account w...
by Thorsten Wahl
Fri Mar 04, 2011 8:59 pm
Forum: Bismarck General Discussion
Topic: Bismarck Myths
Replies: 179
Views: 47262

Re: Bismarck Myths

At around 40 sec of flight time the target was able to leave the precalculated landing zone of the projectiles by own maneuver. This forces the enemy to increase dispersion artificial in range and deflection.
by Thorsten Wahl
Thu Mar 03, 2011 8:02 pm
Forum: Bismarck General Discussion
Topic: Bismarck Myths
Replies: 179
Views: 47262

Re: Bismarck Myths

Its my personal opinion that Hood should stay at longer distances with 40-50 sec flightime for the projectiles to deal with the lower hit probability at such a distance. If Bismarck accepts a distant fight it has also to accept probably depleted ammo and the mission should be at least soft killed.
by Thorsten Wahl
Tue Mar 01, 2011 8:05 pm
Forum: Hypothetical Naval Scenarios
Topic: Bismarck vs. Iowa
Replies: 322
Views: 85646

Re: Bismarck vs. Iowa

Quote from myself at the navweaps forum http://warships1discussionboards.yuku.com/reply/209852/Best-overwater-protections-WWII-post-Treaties-BBs#reply-209852 "The thickness of the torpedobulkhead was completely 45 mm from ship bottom to 140 cm (corrected typo) above armored deck. Extending from...
by Thorsten Wahl
Mon Feb 28, 2011 8:31 pm
Forum: Bismarck General Discussion
Topic: Bismarck Myths
Replies: 179
Views: 47262

Re: Bismarck Myths

As Captain Dove of the Africa Shell said to Captain Langsdorf, this is all on paper. It isn't battle tested, which would need a new version of the River Plate battle, where Langsdorf follows the long range tactics. I'm inclined to think that Navy Weaps is a bit on the conservative side, but of cour...
by Thorsten Wahl
Mon Feb 21, 2011 8:32 pm
Forum: Naval Weapons
Topic: Ranging of guns
Replies: 7
Views: 2565

Re: Ranging of guns

In german this error is known as Kantfehler. It was automatically corrected by the fire control system. The turret was trained opposite to the roll and the elevation was slightly increased until the barrels are occupying the same orientation within space as without roll.