R-27ER launch authorization

When firing R-27ER's, why is it that I can get a launch authorization much sooner when using TWS mode than I can using STT mode? In other words, why can I fire these missiles at a greater range using TWS instead of STT?

Do you mean why you get LA sooner when the radar automatically transitions from TWS to STT than when you are manually switching from a search mode to STT?

If so the explanation is simple - when the radar is operating in TWS it is collecting track data for the target, so at the point when it transitions to STT, it only needs a short time to prepare for missile launch.

In a search mode the radar is not tracking the target - this only occurs when you switch to STT and therefore the radar needs more time build a firing solution.

When firing R-27ER's, why is it that I can get a launch authorization much sooner when using TWS mode than I can using STT mode? In other words, why can I fire these missiles at a greater range using TWS instead of STT?

You shouldn't be able to. Launch authorization is predicated on the dynamic parameters (altitudes, airspeeds, aspects, etc) of the situation. Same dynamics should give you identical launch authorization ranges.

I do know that, whereas in the past TWS soft lock had transitioned to a hard lock (РНП) once roughly 15% inside R-Max, it now makes that transition to РНП just above the R-Max range. Is this perhaps what you're seeing? I haven't noticed an earlier launch authorization myself.

EDIT: Just ran a quick mission to check. In both cases, ОВЗ to РНП or СНП to РНП, launch authorization didn't occur until the range reached R-Max. As I mentioned above, there's been a change in when СНП transitions to РНП. It now occurs outside of R-Max. Have no idea whether or not that is the correct modeling or a bug.

You shouldn't be able to. Launch authorization is predicated on the dynamic parameters (altitudes, airspeeds, aspects, etc) of the situation. Same dynamics should give you identical launch authorization ranges.

 

I do know that, whereas in the past TWS soft lock had transitioned to a hard lock (РНП) once roughly 15% inside R-Max, it now makes that transition to РНП just above the R-Max range. Is this perhaps what you're seeing? I haven't noticed an earlier launch authorization myself.

 

EDIT: Just ran a quick mission to check. In both cases, ОВЗ to РНП or СНП to РНП, launch authorization didn't occur until the range reached R-Max. As I mentioned above, there's been a change in when СНП transitions to РНП. It now occurs outside of R-Max. Have no idea whether or not that is the correct modeling or a bug.

ОБЗ is BVR, but СНП is STT and РНП is RWS?

ОБЗ is BVR, but СНП is STT and РНП is RWS?

It helps to not think of them in strictly Western terms. ОБЗ=Survey mode of BVR (RWS, sort of), СНП=Passage Tracking mode of BVR; Survey with value added (TWS, sort of), and РНП=STT (described differently but pretty much the same).

It helps to not think of them in strictly Western terms. ОБЗ=Survey mode of BVR (RWS, sort of), СНП=Passage Tracking mode of BVR; Survey with value added (TWS, sort of), and РНП=STT (described differently but pretty much the same).

Ah I thought different about the two modes but thanks for clearing that up. What is your reference to read more if I may?

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Ah I thought different about the two modes but thanks for clearing that up. What is your reference to read more if I may?

 

 

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I've been painstakingly working my way through the Russian Su-27 Manual. Other than that there's no single source I can point you toward. Just a lot of googling the Russian terms and then translating slowly. I'm working on a tutorial taking the Russian perspective that I hope I can complete before too much longer. It's half finished at the moment.

There is a mod with an English cockpit and HUD for most Russian planes.

looking forward to it. Thanks

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There is a mod with an English cockpit and HUD for most Russian planes.

There is, but I'd advise against using it in the Su-27. Unless the mod has been updated recently it causes the mach meter to misread.