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Old 11-06-2019, 09:16 PM   #9081
Chizh
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Originally Posted by BlackPixxel View Post
I am not sure if that is refering to the SU-27 being able to lock and track targets at any speed and any aspect (except for 90°) when within 5 km in vertical scan, or if it means that the vertical scan only works up to 5 km.
Vertical mode works from 5 km and closer.
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Old 11-06-2019, 09:31 PM   #9082
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Thank you!

Now I found the following section in the Su-27SK manual:

"В режиме ВЕРТИКАЛЬ обеспечивается захват и сопровождение визуально видимой цели на дальностях менее 5 км на всех ракурсах, кроме 4/4, во всем диапазоне скоростей сближения (отставания). На уравненных скоростях возможен неустойчивый захват цели. Для устойчивого захвата необходимо обеспечить разность скоростей истребителя и цели не менее 150 км/ч."

I am not sure if that is refering to the SU-27 being able to lock and track targets at any speed and any aspect (except for 90°) when within 5 km in vertical scan, or if it means that the vertical scan only works up to 5 km.
I could not find something that gives a range limit for the radar for close combat modes in general in that 27SK manual.

In DCS at least something is happening with the radar when the plane is in one of the close combat modes within 5 km. Within this range of 5 km it is able to track targets when flying upside down below altitutes of 1500 m above ground level. Above 5 km or in a BVR mode the radar will not work under such condition.
I have not read anything about radar not working while rolling > 120° in any manual yet, only that it will no longer be roll stabilized above that angle (max roll angle of the gimbal is about +-120°)
I'm sure, the 10 km zone for dogfight mode is same for Su-27 and Mig-29. And info in Su-27SK manual is "corrected".

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Same source about rolling
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Old 11-06-2019, 09:33 PM   #9083
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Vertical mode works from 5 km and closer.
А вот в моем источнике пишет, что вертикалка так же до 10 км.
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Old 11-06-2019, 09:37 PM   #9084
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But that section just says that the antenna will be stabilized within this limit (stay level with the horizon). Also it is about scanning mode, not target tracking if I read it correctly.

When the roll angle is > 120° the antenna will not be level anymore on the roll axis, but how will that make any radar operation impossible, especially when the target is already locked?
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Old 11-07-2019, 06:53 AM   #9085
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Originally Posted by Melitara View Post
А вот в моем источнике пишет, что вертикалка так же до 10 км.
Attachment 220681
Мы в итоге так и сделали - 10 км. Хотя данные разнятся.
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Old 11-07-2019, 10:07 PM   #9086
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Мы в итоге так и сделали - 10 км. Хотя данные разнятся.
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