The convergent-divergent is great for supersonic afterburning performance but is actually inferior to the other designs for supercruise in particular. The most optimal is a design similar to the F-22’s.
This is a good document, thank you. Now we can see that the two documents align quite well and it is explicit that the EJ200 was described in my previous post.
It is clear, the EJ200 is not well optimized for supercruise. If it were better optimized, the bypass ratio would be smaller. The pressure ratios and temp limits would be retained, but there would be heavier focus on dry thrust and this would require a lower T3 temp, higher SOT, and inferior TSFC during afterburner operation to achieve the same afterburning thrust capability. They simply had hard requirements to enhance the SFC during dry operation as well as during afterburner. They simply could not meet subsonic cruise SFC requirements and supersonic re-heat SFC performance without the larger bypass ratio and within the temperature limitations.
It is this bug (go up the chain of replies a bit for more details).
There is a typo in radar’s config file (only on the Captor-M with Pirate, for some reason) that sets the time it takes to clear a target that the radar has not updated to only 4 seconds. So every time you have a TWS target that the radar was not able to update in 4 seconds, it just clears that contact off of the scope. It also centers the scan area if you have have target cycling turned on (you don’t manually move the pipper).
That thing is a C-D-Nozzle, just it being square to help mixing jet exhaust and surrounding airflow to minimize the IR-signature. Especially as the aerdynamics should be worse for a square exhaust as it induces wake vortices at its corners which is the reason it helps mixing the different airflows.
The Bypass ratio of 0,4:1 of the EJ200 is for one just minimal different from the F119 with 0,3 and second it was chosen as a compromise to accomodate bigger engine cores for future developments. The difference in supercruise capability shouldn’t be more than a few percent in this case as the Fan of the EJ200 compresses even better than the F119 Fan.
The F119 has lower T3 and higher SOT aiding dry thrust. The excess dry thrust pushes a draggier airframe to 1.7+ mach supercruise. This is aided heavily by the lower bypass ratio. If it was only a few percent better it would not have such raw performance benefit.
I was under the impression the convergent-divergent nozzle of the Eurofighter is not fully variable and that was one of the upgrades that set apart the TVC nozzle upgrade theorized for it.
The TWS bug is annoying. But what else is majorly wrong with the radar? The scan speed isn’t great but as I’ve been saying for months there’s no information on that so we’d be hard pressed to fix it.
