You're seeing what you want to see. Just because you haven't seen the GPUs in X amount of pics doesn't mean that is representative of the practices followed for operating fighter aircraft as a whole. You're not comparig like for like. The LCA pics you would have seen would all have been whilst it is under testing with its OEM and not with its users. The inherent difference in requirements and treatment is more than apparent if you apply some critical thinking.
Your "maintence hog" assertion makes ZERO sense, because the entire pupose of a GPU is to suppliment (or substitute) the onboard APU/EPU of the fighter jet. It is NOT an engine starter as you keep stating.The APU is not cutting edge tech- this can be bought off the shelf easily or simply devloped in house as most OEMs do (and HAL has done)- if the APU was at fault it would have been replaced by now. If you are stating the JFS is at fault then it makes even less sense as the JFS has been developed with one of the world's largest aviation engine manufactuerers (GE) to be used in some of the most inhostpitable enviroments. As such, where is the scope for the failure on the APU or JFS? They are both relatively simple components that would have been swapped out by now if not working.
Even IF the GPU was required every single time the LCA was operating, this would hardly be an issue, all a GPU is is an external power source, used to provide power to onboard systems whilst the engine/propulsion unit is not running.
To make it easy, I'll give some final reasons to refute your cr@p and then I am going to bed.
Why the GPU is present with the LCA more often than with other a/c you have seen (of that is even true which doubt)
-GPU is being utilised to save HAL jet fuel- APU uses jet fuel to generate power, GPU uses diesil.
-Not all airports allow for the use of APUs for certification reasons and thus off board GPUs are required
- Given that the LCA is still under testing, more time will be required in the cockpit with the engine/propulsion unit turned off for both engineers and pilots to conduct pre-flight and post-flight checks, diagnostics and tests (possibly to validate simulator models) thus requireing the GPU to not strain the APU for extended periods of time
- I forgot to mention, that these GPUs cabinets are also used for offboard air conditioning given the climate in India and Sakir, perhaps they are being used to provide some comfort to the pilots without depleting the onboard APU.
As you have said, you are not an aviation expert so stop making a fool of yourself. I've given you plenty of rebutals now, if you persist with this line of attack it is clear you are not interested in making valid observations but simply clutching at straws and trying to demean the LCA on whatever grounds you can think of.
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