Armor Level Protection to Armor Class
 

I did this a while back, but I worked out based on what various levels are suppose to stop and what E-Factor those weapon had and worked out the following chart.

ARMOR LEVEL PROTECTION

Level I Armor Class: 8
Level IIA Armor Class: 10
Level II Armor Class: 12
Level IIIA Armor Class: 14
Level III Armor Class: 18
Level IV Armor Class: 21


PASGT Helmet
Armor Class: 14
Weight: 1.65 kg
Covers 40% Front and 90% sides and back

PASGT Improved Outer Tactical Vest
Armor Class: 14
Covers: Torso, Shoulders, Upper Arms, Neck and Groin
Armor Class: 21 (4 Critical Plate, front, back and sides of torso, 70% coverage)
Complete Weight: 13.6 kg

PASGT MBAV (Modular Body Armor Vest)
Armor Class: 21
Complete Weight: 7.3 kg
Covers: Torso (4 ridged plates, front, back and sides) 70%

Batlskin Viper P2 Helmet
Armor Class: 14 (Level IIIA)
Weight: 1.15 kg
Covers: 40% Front, 80% sides and rear
Accessories: Viper Front Mount, Viper Three Position Visor (AR: 8)(0.275 kg) and Viper Mandible Guard Kit (AR: 10)(0.385 kg), designed for Comms Headset to be worn under helmet.

I worked this chart up awhile ago, and I like your chart as well. What do you think the AC is NIJ III+?

http://www.thesupplybunker.net/pdf/4...tings_v1.1.pdf

I'm working on an update for this chart as well. Transparent Armor (or Bullet Resistant Glass), is a little harder to find specs on it, but I'm making headway on this front.

NIJ III+??
 

I have the the Ballistic Resistance of Body Armor NIJ Standard - 0101.06 and I couldn't find a listing for Level III+. Technically there isn't even a Level V, but because of the protection provided of the highest level of Dragon Skin Body Armor the term Level V is applied and the specifications are classified by both DOJ, DOS and DOD. I just kind of guesttimated and could be as much as 4 to 6 points higher.

PS> Level III+ may refer to Level III with Stab Protection, So its Level III Ballistic Plus whatever rating of stab protection, normally Level I.

I've looked around for it as well. I see it referenced by a few manufactures, but don't see it in the NIJ standards either. I think it is NIJ III + AK47 resistant, but not completely sure.

I thought Dragon Skin was no longer made? And NIJ had withheld there certification of it as well.

Pinnacle Armor
 

Pinnacle Armor, the maker of Dragon Skin body armor, is still around as far as I have been able to find they are still making the armor along with other products. As of 2007 the Level III armor had NIJ certification of the 6 year operational life and the SOV-4000 (Level V) is made but is restricted to sale to government agencies only. SOV-2000 (Level III) and the SOV-3000 (Level IV).

http://upload.wikimedia.org/wikipedi...t_launcher.jpg

http://www.inetres.com/gp/military/i.../AT4/AT4_2.gif

http://upload.wikimedia.org/wikipedi...-AT4_image.jpg

SYSTEM
Alternative Designations: US M136, Bofors AT 4, FFV AT4
Date of Introduction: INA
Proliferation: At least seven countries
Description:
Crew: 1
Caliber (mm): 84
Weight (kg): 6
Length (mm):
Firing Position: 1,000
Travel Position: 1,000
Rate of Fire (rd/min): N/A (disposable)
Fire From Inside Building: See AT4 CS

SIGHTS
Name: INA
Type: Popup, preset to 200 m
Location: Top left
Night Sights Available: Yes, INA

VARIANTS (see NOTES)
LMAW: Light Multipurpose Assault Weapon, uses HEDP
AT4 CS: Confined space
AT4 HP: High penetration

AMMUNITION
Name: AT4 HEAT
Caliber (mm): 84
Type: HEAT
Range (m):
Effective: 300
Arming Range: INA
Penetration:
Armor (mm CE): 420 (E-factor 1958)
Weight (kg): 6.7
Muzzle Velocity (m/s): 285
Name: LMAW (see VARIANTS)
Caliber (mm): 84

Type: HEDP, modified Carl Gustaf HEPD FFV 502 (with dual mode fuze)
Range (m):
Effective: 300
Arming Range: INA
Penetration:
Armor (mm CE): 150 (E-factor 502)
Concrete (m): INA
Casualty Radius (m): INA
Muzzle Velocity (m/s): 235

Name: AT4 CS (confined space) can fire from confined spaces as small as 22.5 m3
Caliber (mm): 84
Type: HEAT or HEDP (LMAW) warheads
Range (m):
Effective: INA
Arming Range: INA
Penetration:
Armor (mm CE): 500 (E-factor 2466)
Weight (kg): INA
Muzzle Velocity (m/s): INA

Name: AT4 HP (high penetration)
Caliber (mm): 84
Type: HEAT
Range (m):
Effective: INA
Arming Range: INA
Penetration:
Armor (mm CE): 600 (E-factor 3138) (DPW = 1179)
Weight (kg): Less than 7
Muzzle Velocity (m/s): 290

http://i81.photobucket.com/albums/j2.../AT-4specs.png

http://upload.wikimedia.org/wikipedi..._2010_0660.JPG

http://www.imfdb.org/images/thumb/a/..._Grom_BMP1.jpg

http://www.militaryphotos.net/forums...2&d=1308305238

https://encrypted-tbn0.gstatic.com/i...nddoZJbnBxaUOe

Caliber, Type, Name: 73-mm smoothbore gun, 2A28/Grom
Rate of Fire (rd/min): 7-8
Loader Type: Autoloader
Ready/Stowed Rounds: 40 / 0
Elevation (°): -4/ +33
Fire on Move: Yes, but only 10 km/h or less (est)
http://www.kyklotron.com/rocket6.jpg
73-mm HEAT-FS, PG-15VNT (tandem HEAT)
Maximum Aimed Range (m): 1,300
Max Effective Range (m):
Day: 1,300, but 600 or less on the move
Night: 800-1,000
Tactical AA Range: INA
Armor Penetration (mm CE): 550-700 (RHA) (e-factor 2797 - 3847)

http://www.digplc.com/products/1/1.2.11.jpg
73-mm HEAT-FS, PG-15
Maximum Aimed Range (m): 1,300
Max Effective Range (m):
Day: 800, but 600 or less on the move
Night: 800-1,000
Tactical AA Range: INA
Armor Penetration (mm CE): 335 (RHA) (E-factor 1452)

http://www.digplc.com/products/1/1.2.22.jpg
73-mm HE, OG-15BG1
Maximum Aimed Range (m): 1,300, 600 or less on the move
Max Effective Range (m):
Day: 1,300, but 600 or less on the move
Night: 800-1,000
Tactical AA Range: INA
Armor penetration (mm): INA, can damage/defeat APC.
http://www.digplc.com/products/1/1.2.14.jpg
73-mm HE, OG-15VM
Maximum Aimed Range (m): 4,500
Max Effective Range (m):
Day: 1,300, but 600 or less on the move
Night: 800-1,000
Tactical AA Range: INA
Armor Penetration (mm): INA, can damage/defeat APC

United States 106-mm Recoilless Rifle M40

Oops, I have already done this one.

http://upload.wikimedia.org/wikipedi...agh_rocket.JPG

http://upload.wikimedia.org/wikipedi...0px-MGM-51.jpg

http://www.inetres.com/gp/military/c...llelagh_02.jpg
Name MGM-151-C Shillelagh Missile
Cal. 152mm
E-Factor = 2466 48 * 2.5^[3.322(log(500) - 1.4049)] = 2465.731375
DPW = 9643 (3.6kg Octol)
Wt. (Empty) 61.28 lb (27.8 kg)
Min. Range 800 yards (730 m) before the gunner can see it, to guide it. Semi Active Command Line of Sight (SACLOS)
Eff. Range 3000m
Max. Range 3000m
Burst Radius 5m
Type of Fire Breech loaded (M81E1 Gun/Launcher)
Rate of Fire Single
Feed Device n/a
Feed Device Wt. Manually loaded
Basic Load 9 in hull of 29 stowed rounds total (M551)
Load Wt.
Total Wt.
Additional Comments:15 pounds (6.8 kg) Shaped Charge Warhead including 8 pounds (3.6 kg) of Octol Explosives
able to defeat 15.5 inches of RHA at 0º obliquity[2]

Is there a version with the Explosives listed in alphabetical or grouped by type?

Also can A5 (98.5 to 99% RDX) be added?

Thanks!

http://i81.photobucket.com/albums/j2...ect/M430A1.png

CARTRIDGE, 40-MILLIMETER: HEDP, M430, M430A1
This cartridge is a high explosive, dual purpose, impact type round designed to penetrate two inches (three inches for the M430A1) of steel armor at 0 angle of obliquity and inflict personnel casualties in the target area. It is fired from 40mm Machine Gun MK19 Mod 3. Not authorized for use in M129 Grenade Launcher.
Warning! Use in the M203, H&K 469, or M79 will result in destruction of the weapon and severe injury or death of the operator.

Complete round:
Type --------------------------------- HEDP
Weight ------------------------------ 0.75 lb (340 g)
Length ------------------------------ 4.415 in.
Weapons used with ------------- MK19 Mod 1and Mod 3 40mm Grenade Machine Gun

Projectile:
Body material -------------------- Blanked and drawn steel
Color -------------------------------- Olive drab w/yellow markings and yellow ogive.
Filler and wieght ---------------- Comp A5, 38 g (32 g - M430A1) (E-Factor = 117. DPW = 43/ E-factor =201, DPW = 43)
Fuze --------------------------------- PIBD, M549
Propelling charge:
Cartridge case -------------------- M169
Propellant ------------------------- M2, 4.2 g
Primer ------------------------------ Percussion, FED 215

Performance:
Maximum range ----------------- 2,200 m
Muzzle velocity ------------------- 241 mps (790 fps)
Arming distance ----------------- 18 to 40 m (59 -131 ft)
Temperature Limits:
Firing:
Lower limit ------------------------ -65°F (-53.8°C)
Upper limit ------------------------ +125°F(+52.0°C)
Storage:
Lower limit ------------------------ -65°F (-53.8°C)
Upper limit ------------------------ +165°F(+73.9°C)
U.S. Army Pack:
*Packing

*Packing box: ------------------------------ 50 rounds in linked belt
Weight ------------------------------ 53 lb
Dimensions ----------------------- 26-3/8 x 16-1/4 x 6-3/16 in.
cube --------------------------------- 1.5 cu ft

Packing Box: ------ 32 rounds in linked belt
Weight ------------------------------- 42 lb
Dimensions ------------------------ 18.76 x 10.39x 6.36 in.
Cube --------------------------------- 0.72 cu ft

Composition A5 (98.5% RDX + 1.5% Stearic Acid) = 1.01

I am enjoying this discussion, but I do have a question. I was just comparing dpw numbers from the rules versus the calculation given here. There are some fairly large discrepancies. There are a few that I find perplexing and wonder if there is a reason. Take for example a TOW missile. It has about 3kg of LX-14, which is 95.5% HDX. Using the RE of 1.28, we get dpw of 8867 using the calculation. The rules show a dpw of 3120. My question is, would the fact that the warhead is a shaped charge inside a titanium form to direct the charge forward be the reason the dpw is lower? In my mind, that sort of makes sense, but does make dpw calculation just that much more complicated.

The data was classified in the 1970s when third edition was written..... These days the warhead data is much more public. The U.S. arms industries relies heavily on foreign sales to make U.S. equipment and R&D for future equipment so this is disclosed at arms expos.

LX-14 is used in the later models of TOW, the BGM-71A/B (which is most likely what is depicted in the game book) used 2Kg of Octol which is 1.16 which gives you 5357 Dpw, still doesn't come close to the published number, but I would guess based on the time frame the correct information would have been difficult to find based on the bibliography listed.

As you ask does the shaped charge account for the reduced Dpw, most likely this could answer that question.

Russian 82-mm Frag Projectile Model 0-832

Projectile fuzed mass: 3.41 kg
Fuze: M-1 PD
Filler: Schneiderite 0.40 kg
Using weapon(s): Mortar M1937 (M1942-M1943 version)
Remarks: Also uses M-2, M-3, M-4, MP, and MP-82 PD
fuzes

Anyone know what "Schneiderite" is and what the RE might be?

According to wikipedia it is the French name for Amatol with a formula heavy on the ammonium nitrate (7 to 1) and with dinitronaphthalene (DNN) replacing TNT.

Looking at the chart above with .32 for pure AN and .68 for a 50/50 mix with TNT (stronger than DNN i believe), I don't think you would get much past .40 but that is really a guess.

https://books.google.com/books?id=u2...losive&f=false confirms the wiki ratios and ingredients.

It looks like the name went out of favor right after WWI as all published references I can find are before 1917.

Thanks....... For some reason the Defense Intelligence Agency is still using this.......Likely a lazy researcher using direct translations from Soviet manuals. No effort to confirm or use modern terminology. Then again...... Soviet manual and archaic terms are a waltz to the numbers.

Defense Intelligence Reference Document
Projectile and Warhead Identification Guide—Foreign
Information Cutoff Date: January 1997

Range=(v^2*sin(2o))/g

Using as a white board for a moment.

Also, mortars general

To good not to share..... Rounds from 40mm and up. NATO and Soviet... by caliber, what weapon system, explosive filler, and amount.

Happy factoring! Attachment 3514


*Correction* NATO and primarily U.S. only.

Attachment 3517

Name M123A1 High Explosive Plastic (HEP) Caliber 165mm
E-Factor =
DPW = 36,668 (15.88kg Compostion A-3)
Wt. 67.60 (30.66 kg)
Eff. Range 914m
Max. Range 914m
Burst Radius 25m
Type of Fire Breech loaded (M135 Demolition Gun)
Rate of Fire Single
Feed Device n/a
Feed Device Wt. Manually loaded
Basic Load 30 rounds stowed in the M728 CEV
Load Wt.
Total Wt.
Additional Comments:This cartridge is a chemical energy round designed for demolition. It is capable of damaging or destroying the type of structures (log
walls, concrete bunkers, etc.) and equipment (abandoned vehicles etc.) encountered on a battlefield. It is also effective as an antipersonnel round.

Limitations:
Functional reliability will be degraded when impacting soft targets such as marshy, sandy, clay, mud, or snow covered terrain.

Hi Nuke!

Is this still current? I am thinking of going on a non-U.S. ATGM game stats spree....... Would this list be the most current still?

I need to add Caribbean, Central America, Canadian, and more Soviet to the threats to Project or KFS equipment.

May even do some torpedoes and anti-ship weapons.

Updated the spreadsheet with the add ins from Nuke11 in the body of the thread and my weapons description short cut.

Alphabetized by explosive type too.

Attachment 3523

http://i81.photobucket.com/albums/j2...0AT%20Mine.gif

Name: M21 Anti-Tank, Heavy
Wt: 17.5 lbs.
Burst Radius:
DPW: 11428 Main chg Comp H-6 10.8 lb 4.9 kg
Packaging: 2 mines w/2 fuzes w/2 boosters in barrier bag. 2 bags (4 mines) w/2 wrenches in wire-bound box
Package Wt: 90 lb
Package Dimensions: 29-1/4 x 12-1/2 x13-1/2 in.
Effects.
Use:
Mine M21 is used primarily for destroying tanks and tracked and wheeled vehicles. It is a standoff type that can penetrate 3-inch armor plate at a distance of 21 inches. It also functions as a blast-type mine (E-factor 204)

Functioning:
The fuze M607 for the mine is actuated by applying a horizontal force greater than 3.75 pounds at the end of the extension rod. The fuze is also actuated by a directly applied downward force of 290 pounds. The fuze ignites the black powder expelling charge in the mine and the resulting detonation opens up the mine cover and removes the earth covering the mine. Back pressure from the burning propellant drives the firing pin into the M42 primer which, in turn, ignites the delay assembly. After 0.15 second, the relay assembly is detonated, firing the M120 booster, which, in turn, fires the main charge. The steel dish is then driven at high velocity against the target. The arming wrench M26 is provided for use with this mine and fuze.

http://i81.photobucket.com/albums/j2...0AP%20mine.jpg
http://i81.photobucket.com/albums/j2...20Landmine.jpg
Name: M26 Anti personnel
Wt: 2.2lbs, 997.9031g
Burst Radius:
DPW: 396 Main Chg Comp B 0.375 lb 170 gm
Packaging: 3 mines per fiber container, 6 containers (18 mines) per wooden box
Package Wt: 60lb, 27kg 215.5400g
Package Dimensions: 21-1/4 x 12-1/2 x 9-3/4 in.
Effects.

Functioning:
Setting the mine to the armed (A) position rotates the barrel assembly so that the primer and delay assembly are in direct alinement with the flash hole in the barrel assembly and with the expelling charge directly above. A force of 14 to 28 pounds on the mine top, or a pull on the top level will activate the mine. Upon actuation, the spring loaded firing pin is released
and fires the primer and delay assembly which ignites the expelling charge. This ejects the fragmenting ball assembly to a height of approximately 2 meters. The delay, ignited by the expelling charge, then initiates the
booster which detonates the main charge, shattering the fragmenting ball. The mine may be rigged for tripwire activation. Remove the trip lever from storage in the spool assembly and insert in the threaded well in the
cam, top, center. Attach one or more of the tripwires, as required.

Attached to, but easily removable from the mine are the following accessories: Arming Handle, Arming Instruction Tag, Trip Lever, and Spool Assembly. Four 20 foot trip wires, two colored olive drab and two tan, are stored on the spool.

http://i81.photobucket.com/albums/j2...20pdm%20-1.gif
http://i81.photobucket.com/albums/j2...os/M86_PDM.jpg
http://i81.photobucket.com/albums/j2...0bandolier.jpg

Name: M86 Pursuit Denial Munition
Wt:
Burst Radius:
DPW: 49 Main Charge Comp A5 21 gr
Packaging:
Package Wt:
Package Dimensions:
Effects.
The M86 Antipersonnel Mine is manually armed by removing the safety clip and then the arming strap assembly. A camming action breaks the shorting bar and forces the battery ball against the battery breaking the glass ampule containing an electrolyte which activates the reserve battery and provides power. The shorting bar hook, attached to the cam, shears the shorting bar (a safety device across the detonator). After a 60-second (nominal) electronic time delay, a piston actuator in the Safe and Arm mechanism is electrically fired, moving a slider to align the detonator with an explosive lead in the slider. At the same time, seven sensor triplines are released. Approximate three or four triplines will deploy up to 20 feet from the mine, depending upon the at-rest position of the mine. The remaining triplines may be hindered due to their proximity to the resting surface. After an additional 10- second electronic time delay, allowing the munition to return to equilibrium, the mine is fully armed electronically. Disturbance of a tripline, or the mine itself, now triggers a switch which completes an electronic firing circuit. The S&A electric detonator initiates the S&A firing train which initiates a detonating cord which then initiates a thin layer of liquid propellant, which by gravity rests under the kill mechanism, shattering the plastic mine body and propelling the kill mechanism upwards from 6 inches to 8 feet above the ground where it detonates. The kill mechanism is a spheroid internally embossed and loaded with 21 grams of Comp A5 and when detonated, propels fragments in a high velocity spherical pattern.
If the mine is not activated by tripline or disturbance mode, a factory preset self-destruct feature initiates the mine in 4 hours plus 0-20 percent.

Yes this is still my current work. I've been digging around for Soviet information, but it seems to be a bit harder to find for some reason.

For M102 Howitzer (KFS issue) towed behind one M35 2 1/2 ton truck.

Caliber: 105mm
Weight: 1500kg
ROF: 5 round per minute
Maximum range: 14,000 Meters
Feed Device: Single shot, screw type breech
Basic Load: 150 rounds
Ammunition types: HE, WP, Illum
Crew: 8

http://i81.photobucket.com/albums/j2...105mm%20HE.jpg

Name M1 105mm HE
E-Factor =
DPW = 6136 (2.63084kg Compostion B) or 3771 (2.17724kg TNT)
Wt. 39.92 lbs (18.107407 kg)
Eff. Range 11500m
Max. Range 11,500m
Burst Radius 25m
Type of Fire single shot, screw type breech
Rate of Fire Single
Feed Device n/a
Feed Device Wt. Manually loaded
Basic Load 150 rounds
Load Wt.
Total Wt.
Additional Comments:Very basic HE artillery shell. Maybe fitted with a variety of fuses for air burst (Variable Time (VT)) which is preferred, impact, delay, and contact fuses.
Limitations:
Functional reliability will be degraded when impacting soft targets such as marshy, sandy, clay, mud, or snow covered terrain.

Use:
The projectile of this cartridge contains high explosive and is used for fragmentation, blast, and mining in support of ground troops and armored columns.

Description:
The projectile consists of a hollow steel forging with a boattail base, a streamlined ogive, and gilding metal rotating band. A base cover is welded to the base of the projectile for
added protection against the entrance of hot gases from the propelling charge during firing. The high explosive (HE) filler within the projectile may be either cast TNT or Composition B. A fuze cavity is either drilled or formed in the filler at the nose end of the projectile. This cavity may be either shallow or deep. A cavity liner, to preclude dusting of HE during transportation and handling, is seated in the cavity and expanded into the lower projectile fuze threads. A supplementary charge is placed in the fuze cavity of projectiles having deep cavities. Projectiles with shallow cavities or deep cavities containing a supplementary charge use only short intrusion fuzes, PD, or MT. Those with deep cavities will accept the long intrusion proximity fuze after removing the supplementary charge. Projectiles may be shipped with a PD or MTSQ fuze or with a closing plug. When
shipped with a closing plug, a chip board spacer is assembled between the supplementary charge and plug to limit movement of the former during transportation and handling.
The cartridge case contains a percussion primer assembly and seven individually bagged and numbered propelling charge increments. The base of the cartridge case is drilled and the primer assembly is pressed into the base. The percussion primer assembly consists of a percussion ignition element and a perforated flash tube containing black powder. The seven numbered increment bags are tied together, in numerical order, with acrylic cord. These are assembled into the cartridge case, around the primer flash tube, with Increment 1 at the base of the cartridge case and Increment 7 toward the mouth of the cartridge case.

Functioning:
If the projectile is unfuzed, the closing plug is removed and a fuze assembled to the projectile prior to adjusting the charge and loading the cartridge into the weapon. Impact of the weapon firing pin results in the initiation of the percussion primer which, in turn, ignites the black powder in the flash tube. The flash tube provides for uniform ignition of the propelling charge producing a rapid expansion of the propellant gas which propels the projectile out of the weapon tube. Engagement of the projectile rotating band with the rifling of the weapon tube imparts spin to the projectile providing inflight stability. Projectile functioning is dependent upon the fuze used and may function on impact (instantaneous or delay), function above ground either at a predetermined height based upon time of flight or function in proximity with the target area. Fuze function detonates the HE projectile filler resulting in projectile fragmentation and blast.

CARTRIDGE, 25MM, ARMOR PIERCING DISCARDING SABOT-TRACER, M791
For use in M242 Bushmaster cannon.


Attachment 3586

Cartridge, 25mm, armor piercing fin stabilized
discarding sabot-tracer, m919

Attachment 3587

CARTRIDGE, 25MM, HIGH EXPLOSIVE INCENDIARY-TRACER, M792
For use in M242 Bushmaster cannon.

Attachment 3588

https://en.wikipedia.org/wiki/Relati...iveness_factor

Should a new formula include the detonation velocity to figure DPW?

This may be a place to start:

Thanks for that! That will be helpful..... the fragmentation velocity calculation alone for one thing.

Currently, explosives are ranked and the damage points are factored off the given explosives effectiveness relative to an equivalent amount of TNT.

There is one difference not taken into account when factoring damage. The detonation velocity.

Looking for a way to model some explosives like thermobarics and give them their just do in power.

There are a number of thermobarics in the list... look for aluminum.

The Gurney Equations14 are a range of formulae used in explosives engineering to predict how fast an explosive will accelerate a surrounding layer of metal or other material when the explosive detonates. This determines how fast fragments are released on detonation of an item of ammunition. This initial fragment velocity can then be used with other ballistic equations to predict either danger areas or fragment penetration.

http://i81.photobucket.com/albums/j2...0equations.jpg

So what should the mass of shrapnel be?

I was going with 0.1 gram for a modern grenade. 0.5 gram for a modern mortar shell.

Anyone think more?

Based on data available on the M67, 0.1 gram is about right. The fragmentation coil is about 140 g and tests at the Armament Research, Development & Engineering Center in Picantinny, NJ showed about 1335 fragments.

so how about this.....

M67 Fragmentation grenade..

using the spherical charge equation.

(7620/(7620/0.333)=((0.1/0.18)+3/5)-1/2 <--- that in negative one half as an exponent.



22882 = 0.65555555555555555555555555555556

Fragment is moving a 0.66 meters per second?

But, then E-factor is based on speed and diameter of the projectile..... without weight as a factor.

I think your algebra is off. I solved the equation for V and got the equation below.

Substituting the values I get V = 2730 m/s

Wouldn't surprise me a bit. Algebra is not one of my best subjects. I was trying to use the calculator built into Windows too. My scientific calculator is packed away.

So, with a velocity.... we need a diameter for the e-factor formula.

Modern grenade? 1mm? or 0.5 mm? for a fragment.......

WW2 grenade, 3mm? 5mm?

We might not need to know the size, but use a modified E-Factor calculation. The E-Factor is a measure of the wound cavity. As wound cavity is caused mostly by momentum conservation and transfer, it is the momentum of the fragment that matters. Momentum is just mass x velocity, which we have for fragmentation. We just need to find how the bullet diameter is related to mass and make the substitution.

Edit

Been giving this some more thought. We really don't need to mess with the formula if we have an idea of the fragment size, and that size can be calculated if we make some assumptions. If we assume the fragments are roughly cylindrical with diameter approximately the same as the height, we can use the density of steel and the mass we know to calculate the volume and extrapolate the dimensions. Sounds like a lunch time project.