High-Speed, Supermaneuverability & Stealth

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10 years 9 months

Posts: 194

I think three things are related to each other:

Look this: Su-30MKI vs F-15C

According to the article (that is often referenced by Indian media outlets to highlight the presumed Su-30 superiority on the American fighter jets) an anonymous USAF officer explained that in the case of a missed BVR missile (like the AA-12 Adder) shot by the Flanker, the Su-30 could turn into the clutter notch of the F-15′s radar, where the Eagle’s Doppler was ineffective.

As the AW&ST story explained in detail, this maneuver could be accomplished making a descending, right-angle turn to drop below the approaching F-15 while reducing the Su-30′s relative forward speed close to zero: even if this is a very old air combat tactic, the USAF officer said that the Sukhoi could perform effectively this maneuver thanks to its ability to reduce rapidly its speed and then quickly regain it.

If the maneuver is flown correctly, the Su-30 is invisible to the F-15's Doppler radar--which depends on movement of its targets--until the U.S. fighter gets to within range of the AA-11 Archer infrared missile. The AA-11 has a high-off-boresight capability and is used in combination with a helmet-mounted sight and a modern high-speed processor that rapidly spits out the target solution.

As pointed out by the USAF officer, this tactic “works in the simulator every time,” however, only few countries have pilots with the required skills to fly those scenarios.
http://vayu-sena.tripod.com/comparison-f15-su30-1.html

Due to rapid the increase in missile speed, the air-defense radar system faces severe challenge in tracking these high-speed missiles. During tracking, the radar data are read into the system in a real-time manner sequentially, and thus only few data are available for trajectory estimation in every short time period. Therefore, in this paper, we propose an intelligent radar predictor, including a self-organizing map (SOM), to achieve accurate trajectory estimation under the strict time constraint. By knowing the dynamic model of the moving target, the SOM, an unsupervised neural network, learns to predict the target trajectory using a limited number of data. The performance of the SOM is compared with that of the Kalman filtering. Simulation results based on both the generated and real radar data demonstrate the effectiveness of the proposed intelligent radar predictor.
http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=1182646&url=http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1182646

Rapid changes in acceleration, high-G turns, or rapid changes in RCS can bring about large errors in the estimates of the tracking algorithm and cause the radar to break lock
https://www.sbir.gov/sbirsearch/detail/561452

break lock similar ECM jamming (jamming uses techniques like "range gate pull-off" to break a radar lock-https://en.wikipedia.org/wiki/Radar_jamming_and_deception)

So I conclude stealth capabilities of the Su-35, F-22, Rafale, Typhoon is not only based on the ECM / EW (Jammer pod), RAM, synthetic materials, but also the Supermaneuverability and high speed (Mach 2 or higher)

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