View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000046 | Falcon BMS Known Bugs | Avionics | public | 2021-01-11 14:18 | 2021-01-12 19:07 |
| Reporter | anonymous | Assigned To | Blu3wolf | ||
| Priority | normal | Severity | minor | Reproducibility | have not tried |
| Status | closed | Resolution | no change required | ||
| Platform | PC | OS | Windows | OS Version | Windows 10 |
| Product Version | BMS 4.35 | ||||
| Summary | 0000046: HARM disappears in flight | ||||
| Description | On a DEAD mission against the SA-10 at Liuhe, I launched a HARM at the Big Bird (it actually guided), but shortly before impact, the missile simply disappeared. No missile was launched against it. At least the other HARM I launched at the Flap lid (from very short range) did it's job. ACMI: https://drive.google.com/file/d/1iZq38ZpRPGePkQrHecKGMPByDBmU3Q5O/view?usp=sharing | ||||
| Steps To Reproduce | Not tried yet. Try launching HARMs at very long ranges, especially against search radars. | ||||
| Additional Information | Bubble issue? | ||||
| Tags | AGM-88 HARM | ||||
| Theatre of Operations | KTO | ||||
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That missile was inflight 2:20 secs. there is a battery (very small) that runs out and the missile self destructs. Fire from a higher altitude or fire from a loft attitude (you were 15 deg nose down) to increase the lifespan. |
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Is that definitely the case for the HARM? That would tend to limit its flex capability. I didnt find any mention of a self destruct in the -34, but it did mention that physical characteristics of the HARM are described in the T.O. 1-1M-34 (and 1-1M-34-1 (Secret)). If the physical characteristics are classified, all we can do is make a plausible guess anyway. I noticed that this website describes a feature of Prebriefed (PB) mode as commanding a self destruct if the intended target wasnt found: https://www.vaq136.com/ea6bharm/ I will amend this to minor severity, as a workaround exists - launch from closer. If this is intended behavior, it can be marked resolved - no change required. If this is unintended behavior, it would be worth looking at Launch Acceptibility Region data for the HARM - does the HARM indicate it can be launched at targets which its battery life does not support? |
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Harm battery exhausted Missile self destruct |
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| Correction to my last: If this is intended behavior, it is also worth looking at the LAR data for the HARM, as presumably the issue reporter did not intentionally fire from outside its (indicated) range. | |
| It was about 40 NM and deep inside indicated range. | |
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I ran a test to try to duplicate this -- here are my observations: 1) Assuming you ran an unaltered campaign, the SA-10 would be invisible on the map due to fog of war. I didn't see evidence enough of position changes to gain PGM2, so I assume the HAD could not be reliably used. Given these assumptions, your only choice would be to fire in HAS which has no LAR. Why? In HAS you don't know the range to target, so LAR can't be computed. 2) In my test, I switched to POS PB mode since I knew where the test SA-10 was. Here was your configuration at launch in Tacview: https://i.imgur.com/gxwbaPS.png Here is my HUD in the test (notice I'm even a bit closer than you and less nose-down) I am outside LAR RMAX2 but inside RMAX1 https://i.imgur.com/mcrHZ5o.jpg |
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Okay, the part with RMAX2 makes sense. But I did know where the SA-10 was. For some reason, HAD actually indicated PGM2 or PGM1 (don't remember). Also, I knew that it was somewhere around Liuhe. It's probably not a bug, con you delete this? |
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| closed as no change required. | |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2021-01-11 14:18 | anonymous | New Issue | |
| 2021-01-11 14:50 | anonymous | Note Added: 0000087 | |
| 2021-01-11 21:22 | Blu3wolf | Tag Attached: AGM-88 HARM | |
| 2021-01-11 21:29 | Blu3wolf | Note Added: 0000088 | |
| 2021-01-11 21:29 | Blu3wolf | Severity | major => minor |
| 2021-01-12 02:19 | anonymous | Note Added: 0000092 | |
| 2021-01-12 02:24 | Blu3wolf | Note Added: 0000094 | |
| 2021-01-12 04:42 | anonymous | Note Added: 0000097 | |
| 2021-01-12 10:32 | Zipgun | Note Added: 0000102 | |
| 2021-01-12 13:26 | anonymous | Note Added: 0000104 | |
| 2021-01-12 19:07 | Blu3wolf | Assigned To | => Blu3wolf |
| 2021-01-12 19:07 | Blu3wolf | Status | new => closed |
| 2021-01-12 19:07 | Blu3wolf | Resolution | open => no change required |
| 2021-01-12 19:07 | Blu3wolf | Note Added: 0000106 |