Min Safe Alt for Mk82 Air High Drag

[REL]

Hey Guys

 

Where can I find the minimum safe altitude for the Mk82 Air High Drag Delivery and all other bombs as well?

[WildBillKelsoe]

Hey Guys

 

Where can I find the minimum safe altitude for the Mk82 Air High Drag Delivery and all other bombs as well?

 

The frag pattern for a MK-82 at 5,000 feet pressure altitude is 2,500 feet vertically and 2,900 feet horizontally. The time of fall is 25.9 seconds. The frag pattern for the MK-84 at the same pressure altitude is 3,150 feet vertically and 3,175 feet horizontally. The time of fall is 29.7 seconds.

 

from

 

http://www.vipersinthestorm.com/html/weapons_bunker_-_page_1.html

 

So, you need to be above 2500 feet (762 meters).

 

I don't know how accurate this site is, but it is roughly 2500 feet according to another site:

Mk. 82: Top of frag envelope 2,520 feet vertical @ 9 seconds after

detonation. Max. horizontal spread at ground level +- 3,100 feet 2 13

seconds plus.

http://www.aviationbanter.com/showthread.php?t=6123

 

But further reading the latter,

 

We dropped inert Mk82s at 300 AGL 500K and

the things were bouncing up level with us. (They were also bouncing

off the Avon Park range so we had to stop that.)

So, broaching, doubtfully implemented in A-10C, should never be attempted if you fly for realism.

[REL]

Take a look at this

[GGTharos]

There is no frag damage modeled in A-10C, but if you want to do realistic deliveries, pretend it's there and plan pop-ups and safe altitude deliveries. The A-10C is too slow to escape a low-altitude retarded bomb drop.

[Eddie]

Well it's actually pretty simple, the HUD minimum range cue will always tell you when/if you are below the safe minimum altitude for a given weapon at a given time, I suggest you review the relevant section of the A-10C flight manual (page 373 onwards).

 

There is no single minimum altitude, it will always depend on your speed and attitude at weapon release as well as the weapon configuration and planned safe escape manoeuvre.

 

As long as you set up your weapon profile correctly (including the SEM) and then execute your delivery as planned paying attention to the HUD cues (the MRC and abort cues) you'll be fine. If you descend below the MRC and/or see the abort cues in the HUD (X in the CCIP pipper) abort and you'll be fine.

 

If you look at the HUD in the video REL linked to, you'll see that the IFFCC is clearly telling you you are in the frag pattern of the weapon if you drop at that time.

 

You can very safely employ Mk-82 or other free fall munitions at 500ft IF you do things correctly.

 

 

So, you need to be above 2500 feet (762 meters).

 

I don't know how accurate this site is, but it is roughly 2500 feet according to another site:

 

No. You're incorrectly assuming the max frag pattern of a Mk-82 is the same as the minimum release altitude, it is not.

 

If you read the document you linked carefully, it even states there that the quoted frag pattern takes 9 seconds to form. In order to avoid the frag patter you simply need to not be there when it reaches such an altitude/distance, this is easily achieved if you perform a proper delivery, especially including the SEM.

 

SEMs aren't for fun, they are part of the IFFCC calculations for a reason. ;)

Edited July 6, 2012 by Eddie
Spelling

[FreeFall]

If you look at the HUD in the video REL linked to, you'll see that the IFFCC is clearly telling you you are in the frag pattern of the weapon if you drop at that time.

 

You can very safely employ Mk-82 or other free fall munitions at 500ft IF you do things correctly.

 

Long time ago, after seeing that very video REL linked, I tested it myself. I think that my conclusion was 600 ft was pretty safe if your speed is not too slow.

[REL]

Interesting

THX

[WildBillKelsoe]

that's what I was about to post. so, you answered yourself.