MandolinMagi

WW2 Incendiary bombs-

I would like to see American fire/incendiary bombs added, so here we go.

 

Before we begin:

 

THERE ARE NO CIVILIANS IN GAME. YOU CANNOT BURN CITIES. I DON'T WANT TO HEAR ABOUT "BUT WAR CRIMES" OR "BUT CIVILIANS" THERE ARE NO NON-MILITARY TARGETS IN THIS GAME.

 

 

I'll be covering roughly 1943-1960 timeline wise, other bombs came out later.

 

Part 1: Fillers

Incendiary/fire bomb filler in the 1940s and 50s took three forms: NP, IM, and PT1

 

NP is the classic Napalm, being 88.5% gas and 11.5% thickener. The napalm mix was a refinement of the old rubber-in-gas mix used before.Technically a mix of aluminum napthalate and aluminum palmate, the palmate was actually a Metasap Chemical Company mix of coconut-oil derived aluminum soap that was 48% lauric acid with very little palmate.

 

IM is a mixture of 88.75 percent gasoline, 5 percent isobutyl methacrylate [ (C8H14O2), a chemical polymer also used by the aviation industry for windows], 3 percent stearic acid, 2 percent calcium oxide, and 1.25 percent water

 

PT1 is a IM variant that adds "goop", a complex mixture of magnesium dust, asphalt, and magnesium scraps. This is extremely hot, up to four times hotter than its IM base.

 

All napalm-type bombs use a WP igniter and many use a explosive (either TNT or Tetrytol

 

 

Part 2: Bomb Types

In game, I see several bombs and clusters being used.

 

Early in the war, fighter-bombers used whatever drop tank was available, as many aircraft had unique tanks. For simplicity's sake, all drop tank napalm will use the Mark 78 as a stand in.

Mark 78

The Mark 78 fire bomb, which technically a 1950s design, uses a standard WW2-era 110 gallon drop tank.

Dimensions: 89' long by 26.4' wide

Weight:  760lb (90lb tank, 660lb filler)

Filler: NP

 

M47A2/A4

The M47 was the standard American chemical bomb of WW2. Nominally 100lb, it could be filled with NP, IM, PT1, H (Mustard Gas), WP, or PWP. However, the casing is roughly 25lb. Several variations were made, as the early models had leakage issues. Incendiary versions used a TNT/WP burster to scatter and ignite the contents

 

Dimensions: 48.9" long (A4 uses 3" longer fins) by 8.1" wide

Weight: 

A268.6lb (40lb filler, 28.6 casing + burster)

A469.8lb (42lb filler, 27.8lb casing + burster)

Filler:

A2: NP

A4: PT1

 

AN-M76

The AN-M76 is a heavyweight incendiary intended to provide a more accurate incendiary with some penetrative ability. The casing is similar to the 500lb AN-M64 bomb.

Dimensions: 59.2" by 14"

Weight: 475lb (180lb filler, 10.25lb Tetrytol/WP burster)

Filler: PT1

 

Mark 77

The first of the post-WW2 streamlined firebombs, the Mark 77 is a 750lb low-drag 110 gallon napalm bomb

Dimensions: 138" x 18.6"

Weight: 760lb (668lb filler)

Filler: NP

 

Part 3: Clusters

The M47 maybe be clustered to carry more ordinance. The available clusters are:

 

M24

A hook-and-cable cluster, the M24 holds six M47A4 bombs on one hardpoint.

 

Mk 3 Incendiary

The Mark 3, previously mentioned in my Fragmentation Bomb suggestion, may be used to cluster three M47A2 bombs. It weighs a total of 340lb. 

 

 

Part 4: Effects

 

NP/IM filling burns at 500-675 degrees Celsius or 1,000 to 1200 Fahrenheit. The filling is scattered across a fairly large area. PT1 filler is four times hotter and much more damaging as a result.

 

As a result, napalm will destroy all AI ground units up and including Medium Tanks. Pillboxes and Light Pillboxes are also killable. A single Mk.78/Mk. 77 or Mk 3 cluster will kill an entire AAA/Artillery/Pillbox triangle.

 

For Naval AI targets, Patrol Boats, Landing Craft, and Cargo ships can be killed by Incendiaries. PT1 filled ordinance can kill Destroyers if it is hit by 500lb equivalent (One M76 or 4+ M47A4)

 

PT1-filled bombs do bonus damage to base targets.

 

Part 5: Users.

 

Mark 78: Usable by P-38G, F6F-5, all Tier 3 Fighters, and all Tier 4 Navy fighters 

 

M47A2: Usable by Tier 3 Attackers. F4U-4/4B can carry them on wing racks

 

Mk.3 Incendiary: Usable by all Tier 4 and 5 Navy Fighters

 

AN-M76: Available to B-17G, B-57A, B-57B, A-26B-10, and (with improved Conical Fins) FJ-4B

 

M24 Cluster: Usable by B-29A and A-26B-50 only

 

Mark 77: Available to Navy Fighters starting at F4U-4 and Navy Attackers starting at the AD-2

 

 

 

Images:

Spoiler

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Sources:

OP 1234 AN-M47A2 (Google Drive Link)

OP 1664 US Explosive Ordinance

OP 1903 Mark 77 (Google Drive Link)

TM 9-1980  Bombs for Aircraft (1944)

TM 9-1980 Bombs for Aircraft (1950)

OP 1280  Aircraft Bombs

TM 3-400 Chemical Bombs and Clusters

OP 2216, Aircraft Bombs, Fuzes, and Associated Components

TM 9-125-200  Bombs and Bomb Components

 

 

 

 

 

 

 

 

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On 04/01/2019 at 20:42, Iron_physik said:

and for what would you use them?

they would be pretty useless in WT

Killing ground targets, they would have a decent area of effect.

 

On 04/01/2019 at 21:39, Turra said:

This does sound interesting, but how would you use them against tanks in RGB? 

 

On a direct hit they could set tanks on fire by burning oil and gasoline tubes. 

I'm unsure if you would, against tanks a regular HE bomb would be better

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I agree they should be added, perhaps with certain additions they could be even more useful. Currently they would only be effective against exposed artillery and AAA, very low chance against even light vehicles, and completely useless against tanks and ships. 

 

However, if infantry was added in much the same way as tanks and ships in air battles and represented as clusters on the map, this weapon could be extremally effective, by the same token though a large bomb could probably wipe them out just as easily.  

 

For it to be added it would need some gameplay rework to make it viable, by I will still vouch for this as it would be a unique aspect to explore. 

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On 19/01/2019 at 16:12, MandolinMagi said:

Killing ground targets, they would have a decent area of effect.

most ground targets in WT apart from trucks, Artillery pieces and certain buildings cant be destroyed by incendary weapons.

so your weapon cant kill a majority of things in the game -> rather useless

 

(everything in the game that can be killed by machine guns can be destroyed by napalm, all other things are pretty much proof against it.)

 

 

On 05/01/2019 at 03:39, Turra said:

On a direct hit they could set tanks on fire by burning oil and gasoline tubes.

not entirely true, you need to get some of the incendary agent into the tank to cause ANY sort of damage to it.

and even then it would just have a engine fire that can be put off with the [6] key.

 

 

 

 

 

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On 12/02/2019 at 13:44, Iron_physik said:

most ground targets in WT apart from trucks, Artillery pieces and certain buildings cant be destroyed by incendary weapons.

so your weapon cant kill a majority of things in the game -> rather useless

 

(everything in the game that can be killed by machine guns can be destroyed by napalm, all other things are pretty much proof against it.)

 

 

I figure anything a 500lb bomb can kill napalm can. Sure it can't penetrate a pillbox, but who needs to when you just turned the entire area into a 500C inferno, burned all the oxygen, and roasted the crew? Not to mention the effect of several hundred pounds of 1500+C Angry Napalm on your destroyer deck

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