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Thread: Mk-82 AIR

  1. #1
    Senior Member Kimi's Avatar
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    Mk-82 AIR

    I've been trying to find out a detailed description of what the different setting both in the inventory and in the delivery profiles for the Mk-82 AIR.

    First off, INV page:
    - Are the fuze settings even modelled?
    Regardless of the previous question:
    - Nose Fuze, Nose Set, Tail Fuze,Tail Set, how are they correlated with the TOF settings of the dsms weapon profile settings page?
    - FXD HI/LO, PLT OPT/OPT1/OPT2: how are they correlated with the N/T, Nose and Tail settings of the dsms weapon profile control page?

    DSMS Weapon Profile pages:
    - Are the HD/LD HOF settings modelled?
    - RT, UP, EJECT and RACK, regardless of them being modelled in the sim or not, what is the proper description of this options? The manual falls short of a proper explanation.

    Lastly, IRL, which of all these settings are available in flight? And, which of them have been invented by the bomb fairy to overwhelm the DCS: A-10C users with worthless/useless content?

    I encourage the readers of this thread to expand on subjects treated in here that go beyond the sim

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  2. #2
    GOMER 2 Noodle's Avatar
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    I'm almost positive I've made a lengthy post about this subject on the ED forums, but I can't seem to find it. I have too many banned aliases over there to keep them all straight. Here's the no-frills version:

    Q: Are (DSMS INV Page) fuze settings even modeled?

    A: No, with one exception. It doesn't matter which combination of nose and or tail fuze you select, nor does it matter which fuze arm delay you select in the DSMS inventory. In DCS, they have no effect on the operation of the weapon whatsoever. The one exception to this rule is the FZU-39 setting. Selecting NO, will cause the weapon to function at the expiration of the selected timer setting vice the selected HOF.

    Q: How do individual fuze selection and fuze arm delay settings correlate to the DSMS PROF SET page?

    A: Generally there is no correlation, with a few exceptions. DCS does not simulate fuze arming for most bombs, including LDGP, HDGP, LGB, and IAM. Thus, if you were to set an 18 second arm delay, then release an LDGP with a TOF of 6.0 seconds, the weapon will detonate on impact as though the fuze had been armed. It is not possible to "dud" a weapon based on insufficient TOF.

    For CBU, the TIMER setting is respected when FZU-39 is set to NO. For LUU, the DELAY and HOT are respected. There was a bug regarding LUU-2 DELAY not functioning correctly once upon a time, but I haven't tested it to see if it's been fixed.

    Q: How does the DSMS INV weapon configuration setting (FIXED HI/LO, PILOT OPT/1/2) correlate to the DSMS PROF CTL fuze setting (N, T, N/T)?

    A: DCS greatly simplifies the number of possible configurations and outcomes as compared to the real jet. In DCS, with NOSE ONLY fuzing selected, the weapon will be LOW DRAG and will function upon impact. With TAIL ONLY or NOSE/TAIL selected, the weapon will be HI DRAG and will function upon impact. It is not possible to dud a weapon based on invalid or inappropriate fuzing.

    It should be physically impossible to get a HI DRAG release with a weapon that is configured as FIXED LO, but there you go.

    Q: Are the HD TOF and LD TOF settings modeled?

    A: Yes. Assuming that all weapons are inventoried as PILOT OPT, set the HD TOF and LD TOF as desired. Depending on the NOSE/TAIL setting, the HUD will display the appropriate high drag or low drag CCIP, DRC, MRS, and RTSE cues. This is most easily accomplished by creating two otherwise identical profiles, with the only difference being one is set to NOSE ONLY and the other is set to NOSE/TAIL.

    Keep in mind that this still works even if the weapons are inventoried as FIXED HI/LO, which is just another DCS bug/flaw.

    Q: What are the RT, UP, EJECT, and RACK settings, and what do they do?

    A: These are the Offset Adjust settings. They are used to correct for known ballistic errors. None of these settings should ever be adjusted by the pilot. Flight tested and validated values for each of these settings are already contained in IFFCC; the values entered into these fields are ADDED to the nominal values and will result in ballistic aiming errors.

    The RT and UP values bias the HUD CCIP solution symbology a specified number of mils in a specified direction. These values are used to correct for optical distortions in the canopy glass, and to correct for known errors in the IFFCC ballistic solution for a particular weapon. For instance, if Suite 6.9 inadvertently introduces an error into the IFFCC ballistics data for the MK-82AIR, the Operational Test & Evaluation folks could issue guidance for all jets to have a specific correction value entered here.

    The EJECT VEL is a value that represents the impulse (in ft/sec) imparted upon the weapon when released from the pylon/rack. For most free-fall weapons, a cartridge in the pylon/rack is fired which generates gas pressure and moves a piston which forcibly ejects the weapon from the aircraft.

    The RACK DEL is a value that represents the inherent release delay (in sec) to correct for known ballistic effects upon weapons released from suspension equipment other than a pylon mounted MAU-40 or MAU-50, such as a TER-9 or BRU-42.

    Q: Which of these DSMS settings are available in flight?

    A: Most settings contained in the PROF CTL and PROF SET pages are pilot selectable. For example, Release Mode (S/P/RS/RP), Impact Spacing, Fuzing (N/T), DTOF, MIN ALT. Flare delivery HOT is pilot selectable, as are many IAM settings that DCS doesn't model such as impact angle and impact azimuth.

    Most settings in the INV page must be physically set on the weapon during loading: fuze arm delay; fuze function delay; CBU HOF and RPM; LGB laser codes; high/low drag configuration (a very specific physical lanyard configuration must be set in order to enable the PILOT OPTION); rocket pod single/ripple; flare free-fall delay; etc.

    Obviously the presence and type of fuze must be set on the ground. Sometimes a nose plug is used instead of a nose fuze. Sometimes a mechanical fuze such as the M904 is used; this is the fuze most 3D models in DCS have. Some use electric fuzes like the FMU-139 in the nose, tail, or both.

    There is one type of fuze, the FMU-152 aka the Joint Programmable Fuze (JPF) which allows cockpit selection of most settings, but it's usually only used in JDAMs, and specifically on hard target penetrators (giggety) like the BLU-109 based GBU-31(v)3. In any event, DCS doesn't model the JPF.
    Last edited by Noodle; 19Nov15 at 06:03.

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  4. #3
    Senior Member Howie's Avatar
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    I'm assuming for the LUU, using the DELAY setting allows you specify an amount of time in seconds before the flare ignites? What does the HOT setting do?

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    Kimi (18Nov15)

  6. #4
    Senior Member Kimi's Avatar
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    Thanks a lot Noodle
    Another question, what's the difference between PLT OPT/OPT1/OPT2?
    Howie, according to the dcsa10 manual:
    "HOT: Desired height over target at mid-burn." (¿¿¿¿????)
    Now, I don't understand how that works for LUU as their delivery isn't even specified nor explained in the manual (actually it explains how to deploy them as if they were rockets using CCRP).

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    GOMER 2 Noodle's Avatar
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    The difference between PILOT OPT/1/2 is merely the allowable fuze combination and the resulting lanyard configuration; things not simulated by DCS. Presently, DCS treats every AIR as though it were physically configured as PILOT OPT.

    HOT is indeed height over target at mid-burn. The selected/entered value drives the MRC. For CCRP flare deliveries, the MRC and analog range bar mechanization are altered to generate vertical guidance to ensure proper release altitude. The MRC represents the required release altitude, and the range bar represents current aircraft altitude. Just "put the thing on the thing".

    The alternate usage of the MRC and range bar symbology for flare delivery is akin to the alternate usage of the TTRN/RAN for CCRP loft rockets. Almost like a hack.

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