aryobarzan
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My knowledge of aerodynamics is very limited so I can not comments on that..The last I read about this IRJ was that its scaled model was going through Wind tunnel tests ..is that something that can be verified there if not already verified via aerodynamics simulations .I should be pointed out that the lack of swept wing will greatly hinder its capabilities, although that were to be expected since it is basically an enlarged IrAn-140
Iranian Military Transport version which is being flight tested now (Simorgh) also started from IrAn-140 base . I assume simorgh had to go through complete aerodynamics verifications/simulation due to the rear RAMP and engine changes so this IRJ has a significant head start in her design as a passenger jet..