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Given that the Su-35 is merely an upgrade from the Su-27, why is Indonesia purchasing Su-35?

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  • $\begingroup$ so for what tasks is su-30 series better than su-27 series? air to surface attack? do they need it? or do they want to save money and have a lighter specialized fighter for air-to-air combat? $\endgroup$ – user3528438 Nov 2 '17 at 20:49
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There can be many reasons for such a choice. The first is a single seat air-defense fighter, the other is a two-seat multirole air-superiority fighter according to Wikipedia. The cost can be another reason; depending on configuration it seems that the two aircraft have an overlap with both types starting around USD \$40 million per aircraft.

Indonesia already operate a fleet of several single-seat types, such as the Su-27, F-5 and F-16, so it might simply be easier to transition to another single seat fighter. They do have a small number of Su-30 already, so it could also be a desire to use each type for the optimal mission, rather than having one type do everything.

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