The Indians think just giving some peanuts to GTRE to make Kaveri is enough.
yep and it Backfired HARD. Their engine initiative was 1980's yet no Tejas or anything really ever fly with the indigenous engine. Which kinda bizzare like they understand the strategic value of sovereign jet engine manufacturing capability yet investing so little. It's not like they are in short of capable scientists but, the political will doesnt seem to be there.
Also weird tendency to rely on "Magical TOT" will quickly solve the problem.
If AL-41 is required to use PESA radar like Irbis-E how come early PLA aircraft like early J-20, early J-10C, and J-15T could operate AESA with AL-31?
The key is in the generator design. Not necessarily the engine. I recently figured that aircraft jet engine actually already provide high RPM, which suitable for high power generation. Typical Engine mounted generator will "tap" its power from the engine's High pressure compressor/turbine shaft, this typically provide some 10000-20000 RPM or more. If one ask why ? The reason is that there are not much RPM differences in flight condition, this simplify the CSD (Constant Speed Drive) Or overall transmission and generator design. If low pressure compressor and fan shaft are used, then the generator would be more complex as it has to ensure uniformity of power being generated across the RPM of the stage which can be as low as 900 RPM to up to near the high pressure compressor/turbine value.
The next roadblock is generator design, particularly the rotor and stator. 2 Important metric exist namely the current carrying capability of the stator per sqmm and the amount of magnetic flux in the rotor in Tesla. The former can be improved by better cooling while the latter is to use say Permanent Magnet or some other exotic system (e.g Superconducting rotor).
You can use electric motor proportionality equation here to calculate the power

The RPM value should be converted to "RPS"/Rotation Per Second. For example suppose we have Su-27 generator with 30 KW of power, the . Now we want to see the improvements of power when :
-Advanced cooling is used, say Direct immersion and Spray liquid cooling, which allow increase in current density to 28 A/sqmm

-Use of say permanent magnet based on some fancy rare earth material, increasing the rotor magnetic flux to say 2 Tesla. How much power the generator can produce ? assuming same footprint. Converting the RPM to RPS 8360 RPM, means 133 RPS The power would be :
P(hp) = 0.504^2*0.235*28*2*138.88
P(hp) = 464.25 Hp or about 338 KW. 10 times the value of the original GP-21. Well granted i didnt make power correction (as typically generator is rated in KVa where it needs to be multiplied with correction factor of 0.85)
Use of motor equation might make some people raising their eyebrows but it is appropriate given the same principles of electric motor and generator. Remember EV's motor can be generator too for so called Regenerative braking. One can then see how advanced Chinese EV motor nowadays. That easily translates to better and more powerful aircraft generators.
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