Naval History Forums

I did not determine any change in trajectory as i have absolutely no information about this no information about shape of trajectory almost no information on deceleration I read somwhere in british reports that they expect a remaining underwater trajectory for 15"(?) shells of about 120 feet. a...

Another example is the US extended belt, which protects the citadel from underwater shell hits. I think that would have prevented machinery space flooding from the 14" hit below Bismarck's belt armor. You simply stated you didn't think the US scheme would work. Maybe you think you aren't biase...

I thought members would be interested in a German forum I have found: http://forum-marinearchiv.de If you look up a piece entitled "Side armor Bismarck/Scharnhorst, why not sloped?" (it is all in German) you will find on pages 16 and 17, detailed comparisons of most Second War battleships...

The official statement
MDV 601 Heft 13 Operationen von Flottenstreitkräften im Nordpolarmeer im Jahre 1942

According Unterlagen zu Bestimmung Hauptkampfentfernung bla bla bla :wink: theoretical hit probability for batteryshootings of SK 38 at a target 30m wide at 25 km 15,5%, flight time 43 sec, 50% zone 120 m lenght ~25m breadth 30 km 11,1%, flight time 55 sec, 50% zone 140 m length ~30m breadth 35 km 8...

As far as I can see the origin document RobertsonN is referring to, is ADM 281/31 The Ballistic performance of Spaced Armour Assemblies and the effect od varying the Arrangement of plate thickness but this report deals with decapping effects of plate arrangements and their comparative performances u...

No problem
Falltimes of Fritz X at drop height
36,8 sec at 6000 m
40,0 sec at 7000 m

according Besprechungsniederschrift from March 20th 1943)

Tallboy had a terminal velocity of ~1,100 m/sec which would require a drop from over 5,500 m.

Seems to me the speed must be somthing wrong maybe 1.100ft/sec

terminal velocity of 1,100m/s requires roughly 110 sec of free fall, even if we neglect air resistance

v=a*t

1100m/s~9,81m/s²*110s

main link to warships-forum
http://warships1discussionboards.yuku.com/

or indirekt via
http://www.navweaps.com/
there is a link "Discussion Boards"

My name at navweaps is Thoddy.
in my eyes it is necessary to clarify technical meanings, before a certain discussion on the material properties get started.
The "elongation problem" is central part of any discussion on german armor properties, as it has been used to assume some inferiority.

seems to me its an pointerror, probably 4300 m, even the Kriegsmarine is not free of errors

hires
hint each line is representing the result from measurement series of 30 or so individual measurements

10 U... 10m Basisgerät
6 U ... 6m Basisgerät
3 U ... 3m Basisgerät

as you can see they also conduct long range as well as short range training

and a exercise

Very old thread but here is some useful information on the accuracy of optical rangefinding
achieved results of Panzerschiff Deutschlöand during 1st half 1937

the director layer firing on the up roll instead of using the gyro-stabilized firing circuit in the fire control center, rapid roll might have caused the shells to leave the muzzles just very slightly late, bearing in mind there is a finite time between closing the firing circuit and the instant th...

possibly yes