Author Topic: US 5" rockets question (Read 1153 times)

Kurt · « **Reply #15 on:** July 18, 2006, 04:20:56 PM »

Quote

Originally posted by Murdr
It used to take 4 at 1 time, Im sure of that....but I have been adding 1 for good measure for so long, I didnt notice it was different.

Looks like its time for a serious test eh? My number was 200... I'm hoping that I got it right... Like a lottery of sorts

Murdr · « **Reply #16 on:** July 18, 2006, 04:30:16 PM »

Nope it is 156lbs. If you doubt me, set hanger hardness to 157 and 1 rocket will not drop it. Then set hardness to 156 and 1 rocket will destroy hanger.

This was all already tested, link posted above.

Kurt · « **Reply #17 on:** July 18, 2006, 04:32:17 PM »

Well, ok, I'll do that...

But 781 / 4 is not 156... So some number somewhere is wrong. I don't make the rules of math... I just follow them.

Murdr · « **Reply #18 on:** July 18, 2006, 04:34:48 PM »

I said I always fire 5

Kurt · « **Reply #19 on:** July 18, 2006, 04:38:19 PM »

Quote

Originally posted by Murdr
I said I always fire 5

haha, sure, but that means they would have to deliver 156.2.

Computers don't just add .2 to a number for fun... Something is wrong.

Murdr · « **Reply #20 on:** July 18, 2006, 04:47:09 PM »

Look at the other results, they are decimals. The .50 cals worked out to be worth 1.17 lbs of ordinance.

Kurt · « **Reply #21 on:** July 18, 2006, 04:51:55 PM »

I'll buy that.

So the correct answer must be 156.2 Not 156

Murdr · « **Reply #22 on:** July 18, 2006, 04:55:33 PM »

It is equal to or greater than 156.3, but less than 156.4. I just tested those 2 figures offline. Either way, if you round it off I was right

Husky01 · « **Reply #23 on:** July 18, 2006, 04:59:59 PM »

Urrggg Math:huh

Murdr · « **Reply #24 on:** July 18, 2006, 05:00:42 PM »

Here is the original analysis thread

and here were the results

Gun Type Dam in #
.303 Browning AC 0.296
.303 Browning GV 0.3125
7.6mm ShKAS 0.296
7.7mm Breda - SAFAT 0.28
7.7mm Type 97 0.296
7mm MG 17 0.3
.50 M2 AC 1.17
.50 M2 GV 1.25
12.7mm Breda - SAFAT 0.95
12.7mm Ho-103 0.998
12.7mm UBS 1.15
13mm MG 131 0.92
20mm B-20 3.47
20mm Hispano Mk II 4.03
20mm Hispano Mk V 3.94
20mm Ho-5 3.36
20mm M2 AC 4.03
20mm MG 151/20 3.55
20mm MG-FF 3.25
20mm ShVAK 3.47
20mm Type 99 Mk 1 3.42
20mm Type 99 Mk 2 3.85
23mm VYa 5.62
30mm Mk 108 11.63
37mm NS37 16.67
40mm Vickers S 13.89 *
37mm PT Boat 13.2
40mm PT Boat 15.6
37mm HE Ostwind 15.15 *
37mm AP 15.6 #1
37mm HE 31.2 #1
75mm AP 78.1 #1
75mm HE 156.2 #1
88mm AP 117.1 #1
88mm HE 234.3 #1
3.5" Rocket 140.0 #1
4.5" Rocket 93.0 #1
5" Rocket 156.0 #1
RS132 125.0 #1
RS82 93.0 #1
WGr21 200.0 #1
Shore Battery 250 - 500 #2
Cruiser Gun 250 - 500 #2

* The Vickers S and 37mm HE Ostwind are the only weapons I
am not 100% certain of the full series of tests had very
inequal results. The value shown is the maximum damage
inflicted per round. I suspect that the variance is caused
by a bug in the burst dispersion code.
#1 Testing for the GV main guns and rockets was different.
I fired 1 round into a hanger and constantly tweaked the
hanger's damage resistence until I found the maximum single
round damage.
#2 The Main Guns on the Cruisers fire 3 shells at a time
each shell does 250lbs to 500lbs of damage. If all 3 hit then the
target just took 750lbs to 1500lbs of damage. The damage is scaled by range 250lbs at maximum range, 500lbs at point blank, 390lbs at 6400 yards.

Edit: Additional note on this... These figures apply to verses objects. When you get into verses planes, that is a more complex model, and factors like velocity of impact vary the damage done.

Widewing · « **Reply #25 on:** July 18, 2006, 06:45:19 PM »

The Navy developed 5" HVAR rockets weighed approximately 140 lbs, and were armed with a 55 lb warhead. Maximum velocity attained via rocket power exclusively (discounting gravity assist) was 1,375 ft/sec (419 m/sec).

We also have the M8 4.5", tube launched rockets. Each rocket weighed 38.4 pounds, with 5.3 pounds of explosive (shaped charge). Max velocity was 860 ft/sec (262 m/sec).

Note that the 5" rocket carries a hell of a lot more explosive than an HE round from an 88 mm gun, and should be modeled as such.

My regards,

Widewing

Slash27 · « **Reply #26 on:** July 18, 2006, 07:07:08 PM »

Quote

Originally posted by goldelks
Urrggg Math:huh

No kidding. Skuzzy lock this one quik.

WilldCrd · « **Reply #27 on:** July 18, 2006, 11:41:30 PM »

Quote

Originally posted by Murdr
Here is the original analysis thread

and here were the results
[code]
Gun Type Dam in #
.303 Browning AC   0.296
.303 Browning GV   0.3125
7.6mm ShKAS      0.296
7.7mm Breda - SAFAT   0.28
7.7mm Type 97      0.296
7mm MG 17      0.3
.50 M2 AC      1.17
.50 M2 GV      1.25
12.7mm Breda - SAFAT   0.95
12.7mm Ho-103      0.998
12.7mm UBS      1.15
13mm MG 131      0.92
20mm B-20      3.47
20mm Hispano Mk II   4.03
20mm Hispano Mk V   3.94
20mm Ho-5      3.36
20mm M2 AC      4.03
20mm MG 151/20      3.55
20mm MG-FF      3.25
20mm ShVAK      3.47
20mm Type 99 Mk 1   3.42
20mm Type 99 Mk 2   3.85
23mm VYa      5.62
30mm Mk 108      11.63
37mm NS37      16.67
40mm Vickers S      13.89 *
37mm PT Boat 13.2
40mm PT Boat 15.6
37mm HE   Ostwind      15.15 *
37mm AP         15.6 #1
37mm HE         31.2 #1
75mm AP         78.1 #1
75mm HE       156.2 #1
88mm AP       117.1 #1
88mm HE       234.3 #1
3.5" Rocket    140.0 #1
4.5" Rocket    93.0 #1
5" Rocket    156.0 #1
RS132       125.0 #1
RS82       93.0 #1
WGr21       200.0 #1
Shore Battery 250 - 500 #2
Cruiser Gun 250 - 500 #2
/QUOTE]

hmm is it just me or is there something "off" in the powah of a 3.5 and a 4.5 ?
i would think the 4.5 carried a lil more shazam than a 3.5

Widewing · « **Reply #28 on:** July 19, 2006, 12:30:52 AM »

Quote

Originally posted by WilldCrd
Quote

hmm is it just me or is there something "off" in the powah of a 3.5 and a 4.5 ?
i would think the 4.5 carried a lil more shazam than a 3.5 [/B]

Well, the 4.5 was just an enlarged bazooka rocket, with only 5.3 lb of explosives. Moreover, it was a shaped charge, designed to penetrate armor with not much effect against soft targets.

On the other hand, the 5" rocket contained more than twice the explosive in an 88 mm HE round, yet it (the rocket) is rated lower in destructive power than the 88... Beats as to me why...

My regards,

Widewing

Stoney74 · « **Reply #29 on:** July 19, 2006, 02:40:23 AM »

Quote

Originally posted by Widewing
The Navy developed 5" HVAR rockets weighed approximately 140 lbs, and were armed with a 55 lb warhead...Note that the 5" rocket carries a hell of a lot more explosive than an HE round from an 88 mm gun, and should be modeled as such.

My regards,

Widewing

I guess that's why U.S. pilots raved about the things. If ours are porked, no wonder why everyone in AH is so casual about them. I've seen the current 5-inch ZUNI in action, and it really lays the smack down (loud boom). Don't know warhead size or velocity and how they compare to the WWII models. But, the WWII models, at 55 lbs. of HE, are packing almost 2/3rds the warhead of a current 155mm howitzer round (93 lbs of HE). And those make a big boom when they impact.