Naval History Forums

Fuel consumption
official figure from Gruppe West 10.400 Seemeilen at 17 Knoten
8.600 Seemeilen at 21 Knoten
5.350 Seemeilen at 28 Knoten
Basis Fuel 7.700 m³

Development of Hohentwiel started in 1938 at the C. Lorenz AG in Berlin. The device was originally planned as ground-based fire control radar for the Luftwaffe. As Telefunken with its "Würzburg" device won the tender, the development of Hohentwiel stopped in 1939. In 1941 development was r...

The Loss of HMS Hood A Re-Examination by William J. Jurens This article was originally published in Warship International No. 2, 1987 http://www.navweaps.com/index_inro/INRO_Hood_p1.htm short comment it can not be excluded that penetration of 38 cm Psgr was somwhat better as analysis show, as the ge...

Flak Data according MDV 700 Seekriegsanleitung, Teil 3 Waffentaktik, Heft c Luftverteidigung
The 12,8 cm KM 40 had been a possible dual purpose weapon

if you follow me to the german Marinearchiv-Forum im pretty sure there are several specialists for german (naval) pre ww1 guns
http://forum-marinearchiv.de/smf/index.php
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you can post in english

do you have a photo of the piece ?

regarding Renown vs SH in general it is expected by the germans to have lower own pentrative and destructive abilites to minimise this inferiority there is is either recommendation to fight at distances below 14 km(against verticalprotection ) ore above 20 km ( against horizontal protection) in betw...

(a) When was the decisive hit that slowed Scharnhorst down

It should be called decisive Event -possibly an impact-

20sec fire cycle Bismarck official figure 2 shots per gun and minute in continuous operation regardless from this, the ammo hoists were designed for a 23 sek loading cyle and achieved ~18 sek during the testing in 1941 --------------------------------------------------------------------------------...

sligth correction for german measure approx 19000 t is complete weight of used armor materials Ww, Wh, KC(nA) regardless if it was used as structural element hull, upper deck, armored deck, upper platform deck superstucture, deck turret armor command towers bulkheads torpedoprotection, rudderprotect...

I dont have ballistic data for the SK 38 using rangetable for US 2700lb 2500fs AP projectile 500m/s =1640fs wind 30m/s = 58,3 knots http://www.eugeneleeslover.com/USN-GUNS-AND-RANGE-TABLES/OP-770-2.html normal range for 1640 impact speed~ 24500 yards column 13 change for 10knot windcomponent in plan...

some ballistic information you can take from
GENE SLOVERS
US NAVY PAGES -AMMUNITION DESIGN AND TESTING
Rangetables for different projectiles
http://www.eugeneleeslover.com/USN-GUNS ... STING.html

In(de)creased air density by 10% in(de)reases range by about 700m at 20,000m.(~3,5%)

If the US -army choose to use a more capable Anti tank weapon earlier like the 90 mm M82 APC they would probably save some losses. 90 mm M82 fire effect table.jpg even this projectile seems very capable its performance is somwhat less then the 88 mm Panzergranate 39-43 (approx 10mm at the same speed...

cap action This phenomenon seem to be lost if thickness of plate /diameter ratio(t/d) increase. if its a steady loss or a sharp change is not possible to derive from the information available to me. head shape this phenomenom seem to differ in its effect as oblique and t/d ratio changes. maybe there...

Rangefinders has because of their high resolution a very limited field of view. As changes in air situation are highly dynamic they were unsuitable for fast scanning horizont for approaching planes.