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| | Su-25, Su-28, Su-39 Frogfoot |
 | | Sukhoi lived long enough to see the mock-up of the aircraft for which he had fought, but died in 1973 before the prototypes were formally commissioned. |
 | | Sukhoi argued strongly that supersonic speed was unnecessary and would impose unacceptable penalties, but some air force officers, conditioned by their experience with Su-7s and MiG-21s, simply could not conceive that any aircraft could survive without supersonic capability. |
 | | Sukhoi realized that the aircraft would have to be produced on a shoestring budget, and that existing equipment, avionics and systems would have to be used wherever practical. |
| hudi.republika.pl /Su-25-1.htm |
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