Mark VIII torpedo mod

[keltos01]

During World War II, torpedoes were manufactured at the Royal Naval Torpedo Factory at Greenock and Alexandria, near Dumbarton; the Vickers-Armstrong (formerly Whitehead) works at Weymouth. Many USA torpedoes were used, especially those for aircraft and Lend-Lease destroyers. The USA also supplied large numbers of their Mark 24 (Fido) (http://www.navweaps.com/Weapons/WTUS_WWII.htm) homing torpedo. Britain had a total of about 7,100 torpedoes in stock as of September 1939, but over 4,000 of these were of obsolescent types no longer in production.

Britain held a technological lead in torpedo development for much of the period between the World Wars, but they were overtaken by the Japanese with their use of pure oxygen. However, the British remained ahead of all other nations. This success was mainly due to the adoption of the Brotherhood burner-cycle engine. The burner-cycle engine was in effect a semi-diesel. Typically, air pressurized to about 840 lbs./in2 (59 kg/cm2) was heated to about 1,800ºF (1,000ºC) by burning a small amount of atomized kerosene-type fuel. This hot air/gas mixture was then fed into the engine via poppet valves and more fuel was injected into each cylinder a little before TDC (Top Dead Center). The spontaneous ignition of this mixture powered the engine.
(http://www.navweaps.com/Weapons/WTBR_Notes.htm)

The British torpedo Mark VIII **.
2 speeds :
45.5 knots range :4570 m
41 knots range : 6400 m

found on wiki :
21" Mark VIII (http://en.wikipedia.org/w/index.php?title=21_inch_torpedo&action=edit&redlink=1)

Country of origin: United Kingdom
Year: 1925
Operators: Royal Navy and foreign customers
Role: Submarines and torpedo boats
Dimensions: 533 mm x 6.6 m (21 inch x 21 ft 7 in)
Warhead: 365 kg (805 lb) Torpex
Propulsion: Burner cycle
Performance: 41 knots (76 km/h) for 10 km (11,000 yd) or 35 knots (65 km/h) for 13.7 km (15,000 yd)used the top one not wiki




http://img220.imageshack.us/img220/3834/markviibn4.jpg (http://imageshack.us)
http://img220.imageshack.us/img220/3834/markviibn4.d8fa447613.jpg (http://g.imageshack.us/g.php?h=220&i=markviibn4.jpg)

the file I posted earlier was removed to tweak it, will re upload soon. (done)

Download link to Mark VIII torpedo mod :

http://files.filefront.com/British+mark+VIII+torpedodrar/;10684903;/fileinfo.html

[gimpy117]

60000 some meters at 41knts good god!!:rock:

[keltos01]

I guess the Brits always had their own peculiar way of doing things, a long range fast torpedo and no TDC :rotfl:

[Raptor1]

No TDC kinda means your long-range Torpedo is useless, You can't really hit anything at long range, Unless you're firing at the entire IJN/Regia Marina grouped together very closely

[keltos01]

http://www.fleetsubmarine.com/tdc.html


"Most, like the "fruit machine" used in British submarines, were basic angle solvers, providing readings that would be manually input into the torpedoes. While certainly a good start, it still required the commander to "aim" his boat onto a particular bearing, and calculate the correct moment to fire the torpedo, which would have been manually set with what was predicted to be the correct gyro angle."


from JackieFisher : http://www.subsim.com/radioroom/showthread.php?t=87470

"The British had no real aiming computer until midway through the war, at which point a clever slide-rule called an "Is-was" which was invented by one of her most successful captains was rapidly adopted, but first on a very informal means of manufacture.

I believe there is one of them on display in the National Maritime Museum at present. I do not have any details, and photography was prohibited."

so we can use the TDC from the american subs for the Class T no problem !

see also :
http://hnsa.org/doc/attackfinder/index.htm

is-was picture :

http://img71.imageshack.us/img71/6959/iswas1ww2.jpg (http://imageshack.us)
[/URL][URL="http://imageshack.us"]http://img146.imageshack.us/img146/4779/iswas2jq8.jpg (http://g.imageshack.us/g.php?h=71&i=iswas1ww2.jpg)


how to actually make one :
http://www.subsim.com/radioroom/showthread.php?t=106923

found this info :http://www.navweaps.com/Weapons/WTBR_PostWWII.htm

Date Of DesignAbout 1925
Date In Service1927
Weight3,452 lbs. (1,566 kg)
Overall Length259 in (6.579 m)
Explosive Charge805 lbs. (365 kg) Torpex
Range / Speed5,000 yards (4,570 m) / 45.5 knots
PowerBurner-cycle

Notes: The Mark VIII was the first burner-cycle torpedo in service. Although the original design dates from the 1920s, those manufactured during and after World War II were to a much-modified design. This torpedo was still in use as late as 1982 when three of them were used during the Falklands War to sink the Argentine cruiser Belgrano. It may still be in use in the navies of other nations that Britain has supplied with submarine weapons..

[keltos01]

I went hunting off the japanese coast, spotted a couple sailboats, lobbed a few torps at them (mk VIII) and got a CTD when one hit ????? :damn::damn::damn:

any ideas why ???

for now either try it out or don't use it, for those with the latest class T, remove the files from the library directory untill I can fiw it...:nope:

[keltos01]

only one speed, but doesn't ctd when it hits :oops:

http://files.filefront.com/British+mark+VIII+torpedodrar/;10698694;/fileinfo.html

[gimpy117]

I guess the Brits always had their own peculiar way of doing things, a long range fast torpedo and no TDC :rotfl:
least they didn't throw rocks...

[Raptor1]

No matter how I look at it, this Torpedo is superior to the Mark 14 in almost every way... (Note, I believe the range should be that much in yards though)

[keltos01]

it has roughly 1.25 the explosive power, goes fast far (41 knots), maybe not as far as the mk14.
mk14

4,500 yards (4,100 m) / 46 knots
9,000 yards (8,200 m) / 31 knots

Mark VIII

5,000 yards (4,570 m) / 40 knots

Mark VIII**

5,000 yards (4,570 m) / 45.5 knots
7,000 yards (6,400 m) / 41 knots


The mark VIII** did go faster farther if you take into account the very small difference between 41 and 46 knots, it's kindof a medium speed compared to the mk14 second (slow) speed.

my all-times favorite is still the japanese model 95 torpedo :

893 lbs. (405 kg) Type 97

Range / Speed :
13,100 yards (12,000 m) / 45-47 knots
9,850 yards (9,000 m) / 49-51 knots


NEW MOD UPLOADED :
This mod gives you the mk28 torpedo and the mark VIII** british torpedo on the allied side and all IJN torpdeoes on the Axis side.
http://files.filefront.com/US+torpedoes+incl+MK+28+orar/;10706217;/fileinfo.html

feedback please !

[Rockin Robbins]

For US style attacks, where torpedoes are not wasted and we get as close as possible, the range is entirely unimportant, as we will never use a third of it. Long range is good for DD attacks on opposing fleets, where aiming isn't really used aside from putting a number of topedoes distributed inside a sector from long range in the hopes of getting some fortuitous hits.

Our subs don't carry enough torpedoes to make that a tactic worth considering.

From our standpoint the 46 knot US Mark XIV is superior to the 40 knot British Mark VIII, but slightly inferior to the 50 knot Japanese Type 97. If you consider the 45.5 knot British Mark VIII (were there two variations?), it would be equivalent to the Mark XIV.

In torpedoes fired from submarines, speed = accuracy because there is less time for the enemy to react if they detect the torpedo on the way, or to make a random maneuver that ruins your shot.

[keltos01]

the japanese Type 92 electric torpedo had a range of 7000 m at 30 knots... not possible to outmaneuver something you don't see...

btw the japs had a different kind of torpedo tube from the US in that it recovered part of the air used to propell the torpedo out of the tube, thus leaving less of a tell-tale sign of firing.

[Raptor1]

The Mark VIII** had 2 speed settings, 1 long range at 41 knots, 1 short (But still longer then the Mark 14) at 45.5 knots, it had a stronger explosive charge then the Mark 14, and a more reliable impact detonator early on (Not sure though)

The Japanese Type 93 Long Lance surface Torpedo is by FAR the best Torpedo of WWII, Oxygen propulsion gave it a top speed at 50 knots, a range of 20km at that speed (Even more at lower speeds), no trail AND it had the largest warhead of all WWII Torps

The Type 95 was designed for Submarines, it was 1 knot faster but lacked the Type 93's range and the King-Kong warhead (Though it was still rather large)

IIRC the Japanese were working on a 60-knot Torpedo but it was canned because it couldn't be kept from jumping out of the water

BTW keltos, why does it say USS Tijgerhaai there?, should be Hr. Ms. (Or HNLMS), Or is that not fixable?

[keltos01]

another small thing to fix... grrrrrrrrr.
off course it should be Hr. Ms. Tijgerhaii and not USS.

Will do when the rest is fixed up