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For the .DJVU manual you can convert this file to pdf via for example: https://converter.app/djvu-to-pdf/convert.php

I did it but the file is too large to attach.
Good luck

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I know that some sources says that 30mm gun in MiG-21F-13 carries just 30 rounds.

But I believe that this is wrong and that correct capacity is 60 rounds. Firstly 60 rounds are mentioned in US assesment based on captured example and also czech sources repeatedly stress 60 rounds capacity. The 30 rounds were mentioned in one czech source as half capacity used as standard for live firing training.

< Message edited by PN79 -- 1/8/2022 11:26:15 AM >

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I cannot rule out that some MiG-21F-13 were built with just 30 rounds capacity as more factories were building them and there were different changes during production.

Here is US evaluation of captured example and on page 22 (1-6) it clearly says one cannon with 60 rounds:
https://theaviationist.com/wp-content/uploads/2013/11/havedoughnut.pdf

This german page also says 60 rounds: https://www.mig-21-online.de/lsk-lv/mig-21-f-13/

Thing is back in 1990s information available about MiG-21F-13 were consistent that capacity is 60 rounds. Then new information come in that it is 30 rounds and since that it is copied without clear explanation where that difference originated.

It is said that original basic MiG-21F had two cannons with 60 rounds - thing is according to czech sources whole 60 round belt goes to the other side - i.e. one canon was removed but place for rounds stayed unchanged.

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Searching through Google shows other discussions about this. One mentioned information says that first series of MiG-21F-13 had one gun with just 30 rounds after removal of the second gun for making space for blocks connected with missile usage and that only later series used free space for rounds from removed second gun by connecting it with first gun and getting 60 rounds capacity in total.

Anyway I can clearly say that czechoslovak produced had 60 rounds capacity.

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Hey there,

out of curiosity, what does it bring you having some specifications written in the description while the actual ingame specification appear just below in the database viewer ?

What I feel is the most useful is the intended usage of the platform such as "The bung Tomo class are guided missile Corvettes mainly used for offshore patrols to protect the EEZ (Exclusive Economic Zone)." eg. or "a single seat, single engine, short-range, daytime/clear-weather, Mach 2.0, 2nd generation point defense interceptor. It also had a secondary ground attack capability."

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Thanks for the clarification, Steven. I do better understand your design philosophy there.

Playing a few scenarios with various platforms I wasn't very familiar with recently, I was quite puzzled to read figures in the description that wasn't matching the DB entry's specs it was describing. I'll write down specific cases to be brought to your attention when I'll encounter them again.

That said, I really enjoy having the descriptions around, and I salute the work you do put curating them since all these years.

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In 1984, the supply of SU-22M4s to NVA-LSK began. At the same time, the two units each received 14 SPS-141 MVG-A (export version of the SPS-141) self-protection deceptive jammers. It automatically generates active response jammers (repeaters) depending on the type of radar signals received and, through combinations of various range and angle deception techniques, enables individual self-protection and protection of aircraft formations against antiaircraft, air-to-air missiles and radar-guided antiaircraft guns. Response interferences are directed against pulse, continuous wave (CW), or quasi-CW radars.
(...)
The main focus of the SPS-141 was against the FlaRak system HAWK. The working frequency range is in the G to I band.

The introduction of the successor model SPS-143 was planned, but the procurement was cancelled due to political events at the end of 1989. In the Bundeswehr, the SPS-141 MWGÄ has been tested by the Wehrtechnische Dienststelle 61 (WTD-61) in Manching after a trial phase on the type SU-22M4 taken over from the NVA, and after appropriate adaptation also on a McD F-4F Phantom II (KWS) of Jagdgeschwader 73 Pferdsfeld and on a Phantom II (KWS) of Jagdgeschwader 74 "Mölders" (JG 74 "M") from Neuburg/Donau. However, it did not make it to a "regular" mission.

During the NATO exercise "ELITE 2005" over the Heuberg training area, the SPS-141 was seen on the F-4F of JG-74 "M" 38+24. Also in 2006, the pod was spotted on the F4-F 37+15 of WTD-61.
During the last flight of an Luftwaffe F-4F at the "PHANTOM PHAREWELL" on June 29, 2013 at JG-71 "R" in Wittmund, the 37+15 of WTD-61 with the SPS-141 was also seen again in the aircraft display ('Static Display').

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ORIGINAL: CV60

Regarding the directionality of the system, the images of the pod seem to indicate that it is a directional system (which makes sense given it was primarily used against HAWK SAMs). The "Naval Institute Guide to World Naval Weapons Systems" also states it was directional (that is where I got the coverage info from). Possibly early systems were not?

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Re: Russian/Soviet Airborne ECM (equipment and tactics)
Postby Tom » Thu May 27, 2021 5:54 pm

They called it the SPS-141, and it only had antennas pointing forward. As mentioned above: later on, they began installing some of these rearwards, to improve protection in that direction (with fins removed, of course). So, no idea if it was the SPS-141M or else.