Uragan-5B / Smerch / Smerch-A Radars

[overscan (PaulMM)]

I've not read a complete account of how Uragan-5B led to Smerch radar, but it seems that in 1958 OKB-15 (later, NIIP) basically got put onto the SA-6 GAINFUL (Kub) project and part of the Uragan-5B team were transferred to Experimental Design Bureau No 339 (NIIR) where all airborne radar work became concentrated. The RP-S "Smerch" was initially called "Uragan--5B-80" with the -80 referring to the K-80 AAM.


The airborne radar teams were essentially split out of NII-17 and then recombined into NIIR. It seems the two teams continued to work somewhat separately under Volkov (Uragan-5B, Smerch, Sapfir-21, Taifun) and Kunyavsky (Sokol, Orel, Sapfir-23)

 

[overscan (PaulMM)]

RP-S Smerch

The detection range of single targets such as Tu-16 with a probability of 60% is not less than 50 km
Tu-16 type target capture range with a 90% probability of at least 35-40 km
MiG-19 target detection range 30-45 km
MiG-19 target acquisition range 22-32 km
Search zone by azimuth offset of the axis of the search zone by azimuth manually or automatically: +/-3°
left -40° (with tolerance -2°)
right +40° (tolerance +2°)
Search area value in elevation possible movement in elevation: 14°
automatically +52.5° -3.5°
manual +34°-10°
Auto tracking zone in azimuth +/-70°
Autotracking zone in elevation +70°...-35°
Review cycle time no more than 3.5 s
Gyro stabilization of the roll search area in the range of +/-70°
Gyro stabilization of the search area in pitch in the range of +70°...-35°
The size of the "dead zone" 0-2 km
Time of readiness of the equipment for work after inclusion 3-4 min.

Tu-128 (Sergei Burdin)

 

[Heatloss]

From US exploitation reports of Belenko's MiG-25.



Source: https://www.secretprojects.co.uk/th...ding-mig-25-top-speed.4099/page-3#post-525663

An interesting possible typo: US used LORO as an acronym to refer to "Lobe On Receive Only", i.e. sequential lobing/inverse con-scan. Hughes FCRs in the later SAGE interceptor era used the same method after ECM updates in the early to mid 60s.

Do you have a copy of this report? I'd like to read it in full if possible.

 

[overscan (PaulMM)]

https://www.secretprojects.co.uk/threads/mikoyan-mig-25-foxbat.4099/post-525663

 

[overscan (PaulMM)]

"Prior to the advent of monopulse, variants of lobe-on-receive only (LORO) and conical-scan-receive-only (CSRO) were the principle forms of angle tracking in radar systems."

 

[Heatloss]

"Prior to the advent of monopulse, variants of lobe-on-receive only (LORO) and conical-scan-receive-only (CSRO) were the principle forms of angle tracking in radar systems."

Conical scanning came before that, but COSRO and LORO allowed for conical scanning without letting a jammer know the antenna position and scan rate, and thus limiting the effect of angle pull-off by inverse gain deception jamming.