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Old 12-12-2022, 04:50 PM   #1
stranger38
 
Join Date: Jan 2009
Location: Indaiatuba/SP Brazil
Default Frag Damage How?

Good evening everyone, let's go for 'nother round!

Tactical shooting says a typical pipe bomb does 6d [1d] damage or 4d [2d] with a 1 lb worth of frag material.

so, let's say i had made a pound of ANFO.

By High tech that is 8d of damage. If i add frag material it would be 6d [2d]?

So, each lb of fragmentation material you get 1d worth of damage? That's the formula?
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Old 12-12-2022, 05:13 PM   #2
sir_pudding
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Default Re: Frag Damage How?

Most munitions seem to base fragmentation damage primarily off the casualty radius.
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Old 12-12-2022, 05:37 PM   #3
mlangsdorf
 
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Default Re: Frag Damage How?

As a rough rule, fragmentation for bullets is 1d per 20mm of shell diameter.

The rule for bombs and grenades is less obvious. The SC50 bomb weighs 122 lbs and does 10d of fragmentation; the SC250 bomb weighs 548 lbs and does 18d of fragmentation. They're both German bombs and probably have close to the same percentage of weight devoted to casing, so it looks like fragmentation scales with the square root of weight. But that doesn't work for the Mk 81 and Mk 82 bombs - the Mk 82 weighs twice as much as the Mk 81, but does 16% more fragmentation damage instead of the expected 40% more (7dx2 per the table, instead of the expected 5dx3 or 6dx3 or 17d) but that might an artifact of rounding and converting to XdxY notation.

It's definitely not linear with fragmentation material weight.

A light pipe bomb, with a 0.5 lb pipe, might do 6d [1d] damage. Then a heavier bomb, with a 2 lb pipe, would do 4d [2d] damage. You'd need a 4 lb casing around your ANFO load to get a 6d [3d] heavy pipe bomb.
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Old 12-12-2022, 05:45 PM   #4
stranger38
 
Join Date: Jan 2009
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Default Re: Frag Damage How?

Quote:
Originally Posted by mlangsdorf View Post
As a rough rule, fragmentation for bullets is 1d per 20mm of shell diameter.

The rule for bombs and grenades is less obvious. The SC50 bomb weighs 122 lbs and does 10d of fragmentation; the SC250 bomb weighs 548 lbs and does 18d of fragmentation. They're both German bombs and probably have close to the same percentage of weight devoted to casing, so it looks like fragmentation scales with the square root of weight. But that doesn't work for the Mk 81 and Mk 82 bombs - the Mk 82 weighs twice as much as the Mk 81, but does 16% more fragmentation damage instead of the expected 40% more (7dx2 per the table, instead of the expected 5dx3 or 6dx3 or 17d) but that might an artifact of rounding and converting to XdxY notation.

It's definitely not linear with fragmentation material weight.

A light pipe bomb, with a 0.5 lb pipe, might do 6d [1d] damage. Then a heavier bomb, with a 2 lb pipe, would do 4d [2d] damage. You'd need a 4 lb casing around your ANFO load to get a 6d [3d] heavy pipe bomb.
And the same bomb with black powder? TS says it's the same damage.
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Old 12-13-2022, 08:28 PM   #5
Pursuivant
 
Join Date: Apr 2005
Default Re: Frag Damage How?

Quote:
Originally Posted by stranger38 View Post
And the same bomb with black powder? TS says it's the same damage.
Because fragments from a black powder explosion don't travel as fast (because BP deflagrates rather than detonates), it wouldn't be unreasonable to reduce fragment damage by -1 or -2 per die.
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