Keep in mind that I’m not really worried about US laws.
All I care about is whether those documents are acceptable for Gaijin or not …
If you live/travel in the US or somewhere that has extradition treaty with the US, you want to be extra careful so that you don’t end up in prison like that DCS dev.
Because I don’t think the courts will accept “Senior Tech Mod said it’s OK” as an answer …
From what I can tell the HMD bits (along with some other interesting stuff) is in the Tape M3 doc
I asked a senior tech mod about it and was told that due to the “explicit export restriction warning and distribution statement D” the Tape M3 doc can’t be used …
Kind of a shame as 40nm ACM and HMD, and finally fixing the HMD (On all planes) and making it act like ACM mode and acquire targets automatically without the need to repeatedly press the lock button, would be nuts …
Yeah, the 40 NM would be nuts. Type 1493 has 74 km lock range on the DEV. I was going to use the 40 NM range alongside some other “evidence” to show that there are no technical restrictions on a boresight HMS in terms of lock ranges on Soviet radars (the 10 km on the N019 and 5 km on the N001 should only apply to vertical ACM).
There is another thing that could probably be reported (depending on if it is listed in the earlier Tapes or the 34-1) and that is the 50° wide 3 bar TWS exclusive mode on APG-66/68 radars (did you or anyone report that already?).
Oh, and thanks for doing the HMS suggestion. Was too lazy to do one myself.
Isn’t Soviet HMD for the IRST (rather than radar) anyways?
IIRC the HMD equipment is part of the IRST system / directly connected to it.
Potentially with the ability to then transfer the lock to radar.
The only issue I can see with that would be the limitation of IRST laser range finder (Since realistically you would have to supply range information to the radar to reliably transfer the lock from IRST to radar)
For example one source mentions a range of “0.2 to 3km” for OEPS-29:
I think Gaijin’s understanding of the ALR-56M comes from the (older) ALR-56C. The TEWS manual of the F-15C can be found, and it mentions that DF is only performed on high-band signals (ID’d as a threat), whilst guidance correlation on SAM guidance radars is performed for low-band signals.
However, yes the use of a dual blade antenna on the F-16C is quite peculiar opposed to the use of a single blade antenna on the F-15. So possible this got changed.
Though in the NATO document, a layout of the RWR antennas is shown for the AC-130J, where it says in plural ‘low band antennas’ and singular antenna for F-16. This may suggest that multiple are still needed for DF. I tried looking for some pictures of the antenna on the C-130J, but it’s not super clear. But I do see something more looking like the compass sail type antennas mounted on the C-130, which again suggest that the F-16C probably doesn’t have C/D band DF, unfortunately. So I am slightly leaning to that Gaijin is correct here. Likely they deemed C/D DF coverage to not be worth it irl (for now).
What you may want to perhaps look into is the ALR-69 on the F-16A ADF. It similarly foregoes the C/D compass sail antenna array under the intake (looks like a square box with fin) for a dual blade antenna under the nose. Possibly however it’s because for the ADF they did not think DF for low-band was necessary for the ADF role and so the C/D DF coverage it has in-game is actually wrong, but that’s just speculation.
Anyway, according to the TEWS manual, ALR-56C (and likely also M) should be able to show if the signal comes from above or below you. Apparently the right wing receiver is slightly different from the others, and does that in addition. Idk if any RWR currently show that however.
Currently the EFT and Rafale both have global coverage of the RWR which i assume is what your talking about with the TEWS manual
Im not sure how this changes the visual display but i do know atleast if you place the target on your belly or directly above it will still get a RWR tone
Regardless that would be a pretty nice change for the F-16 definitely makes it easier to notch missiles
I mean that it can measure whether the RWR ping originates from above or below you (no exact elevation however, and while within RWR coverage) instead of only azimuth. I only know that at least some Soviet/Russian planes have that modelled in game currently on their RWR displays in the cockpit. I am not sure if they, or any, also display it some way in the 3rd person RWR screen however.
On the Su-24M the full cockpit display is replicated on the third person HUD and all of the features are displayed. Signal strength, threat type and elevation are all shown.
I found some more photos of F-16A too
The ADF transitioned to dual blade antennas, while the space under the intake was occupied by a four blade antenna just like a bird slicer.
It’s also visible on the in-game model. I believe this thing is called the ALR-64 compass sail. The A-10 uses it as well, it sits somewhere at the rear I think.
Anyways, if you can find proof that the ALR-69 with dual blade antenna (so on F-16A ADF), then it likely means the F-16C with the same configuration with ALR-56M should as well. Though the similarity with APR-39 and the brochure’s working for the C/D dual blade seem pretty compelling already to me.
But it’s still not really conclusive to me. The Navy’s ALR-67 for instance still requires an antenna array of similar size to the compass sail for C/D DF, so I’m not sure how the AF does it with a much smaller dual blade (though perhaps it can to some extent, but how does it know if the signal comes from the front or back with just 2). Also the fact they still call it an omni directional antenna, like on the F-15, may indicate that it has no DF. I have similarly found in the past that only the quadrant receivers ever get mentioned with DF abilities.
So yeah, if you can maybe find info on the F-16 ADF’s situation (sources may be easier, since it’s older), then it may be somewhat conclusive.