Spin RPM for CBU

[711Hancer]

Could someone please explain me what is the Spin RPM for CBU where in the INV page we can set this value along with the HOF.

 

Do you guys ever played with spin RPM value when deploying CBUs?

[sobek]

Could someone please explain me what is the Spin RPM for CBU where in the INV page we can set this value along with the HOF.

 

Do you guys ever played with spin RPM value when deploying CBUs?

 

This attribute changes the angle of the CBU fins so that it may spin faster or slower during free fall. The RPM influences what the spread pattern of submunitions will look like.

 

I do not know how this parameter quantitatively behaves, but in theory, higher rpm makes your submunitions fly more sideways, what that means for the pattern on the ground should best be tried out in the sim.

[711Hancer]

Thank you so much

 

but in other case, setting a higher HOF will also result in more spread of the burst as well?

 

So trucks aligned in a round shape, cluster wise;

 

we shall set higher HOF

 

and if trucks are i.e on a road vertically aligned we shall set higher rpm?

[sobek]

and if trucks are i.e on a road vertically aligned we shall set higher rpm?

 

It's not that easy.

 

IRL, (this is my own interpretation, i can't say how much of this holds true) i imagine that the orientation of the CBU at point of burst has a major impact on the pattern. So if you drop from high altitude, the bomb will almost be going vertical, spread pattern will probably be circular.

 

Similar, if you drop from low altitude, the bomb will be flying more or less horizontal, spread pattern will be an ellipsoid with spread increasing towards the end where munitions fall last.

 

You see, IRL there are many parameters that are interconnected.

 

The sim for now, AFAIK, does not model individual submunitions, so i cannot say if bomb orientation and speed are taken into account for the spread pattern.

 

What i can say for sure is that you never attack a column (moving or not) perpendicular. Always attack such an array on axis.

Edited May 16, 2011 by sobek

[goldfinger35]

My testing showed that HOF should be set to 500 or 700.

Setting it higher will result in higher % of misses (if you aim at enemy column).

[PhiXX]

Up high at angels 20+ i prefer SFWs at HOF 1800-2200, it's a good tradeoff between accuracy and effected area. For soft targets spread around this should also be a deadly setting with usual cbus, but for tanks you should definitely use goldfinger's settings

[SmokeyTheLung]

Through some testing, it would seem that the HOF and RPM functions (in the sim) do the same thing. Higher RPM with the default HOF gives the same result as higher HOF with the default RPM, as far as I can tell.

If you max out both those values, be prepared for quite a bit of spread!

[711Hancer]

In real life, are CBUs really effective for heavy tanks?

I mean they can take our APCs, small armored tanks or BMPs easily but a heavy armored tank should not be fully destroyed.

[rud]

In real life, are CBUs really effective for heavy tanks?

I mean they can take our APCs, small armored tanks or BMPs easily but a heavy armored tank should not be fully destroyed.

 

CBU-87/103's don't seem like they'd be too effective against a well armored target nor is that what they're really intended to be used for.

 

But CBU-97/105's, which have "smart" submunitions that are designed to punch an explosively formed penetrator through a tanks roof would scare the crap out of me if I drove tanks in real life.

[SFJackBauer]

CBU-97/105 AKA SFW targets the heat concentration of a tank, therefore most likely hitting its engine from the top. This does not necessarily means the crew is killed, but the tank is very likely to be disabled.

 

It would be good if the sim modelled the difference between a disabled and destroyed AFV.

[Phuz]

The CBU-87/103 has settings in the inventory page for HOF and RPM

 

The CBU-97/105 has settings in the inventory page for HOF and FOM

 

The manual explains HOF and RPM, but I have no idea what FOM is [appears to be a time value]. Any help?

[Speed]

Note that the smart munition effect is not modeled in game... they just adjusted the explosive effects of CBU-97/105s till you get what ED judged to be realistic numbers of kills against armored targets. Please do not use CBU-97s outside of this stated purpose unless you want to see really unrealistic damage effects. For example, I saw someone kill four cargo ships with a single CBU-97, and this weekend, I deliberately used seven CBU-97s set to 3000 ft HOF and widely spaced to destroy about 100 city blocks.

[bartleby]

This attribute changes the angle of the CBU fins so that it may spin faster or slower during free fall. The RPM influences what the spread pattern of submunitions will look like.

 

I do not know how this parameter quantitatively behaves, but in theory, higher rpm makes your submunitions fly more sideways, what that means for the pattern on the ground should best be tried out in the sim.

 

Any chance you could wrangle firmer details out of ED? It'd be nice to be able to plan patterns and effects and whatnot instead of just flying on hope.

[Zenra]

The CBU-87/103 has settings in the inventory page for HOF and RPM

 

The CBU-97/105 has settings in the inventory page for HOF and FOM

 

The manual explains HOF and RPM, but I have no idea what FOM is [appears to be a time value]. Any help?

 

FOM usually stands for Figure of Merit, which is a measure or sensor accuracy. The CBU-97 is a Sensor Fused Weapon. Each Skeet deployed includes IR and laser sensors that help them find targets. I am guessing that the FOM setting (if it is a setting - I have not tried changing it) might be a way to affect the rules used by these sensors?

[sobek]

Any chance you could wrangle firmer details out of ED?

 

I'll ask around...

[hassata]

In Vipers in the Storm, Rosenkranz mentions that a CBU-87/B achieves an average of 150-by-150 feet of coverage at a 1,000 RPM spin rate, and 250-by-250 at 2000.