So still diesel powered like 054A as opposed to having gas turbine engines? Sorry I am a bit confused about determining the propulsion. And no IEP?
There is no way to determine the propulsion based solely on the number of exhaust stacks (it would be different it we could see the geometry and number of exhaust vents inside the stack structure).
As for what Helius meant, I will not speak for him, but there was quite a number of CGIs of a large variety that depicted various exhaust configurations which were mostly educated guesses, with some being close to the real thing and some less so. I'm not sure how the accuracy of fan CGIs is worth mentioning here at all.
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Also, there are some recent CGIs done in the last few weeks (but before the launch) where various details were closer to the real thing that we see, such as the exhaust in this CGI below (there are more in the set but I don't need to post them to make this point). Naturally some other details are different such as exact geometry of some systems like the rear mast, gun geometry, main mast height etc, but the exhaust in this one is pretty close to the actual thing
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