Revised configuration of the Sukhoi S-54 in mid-1997, now resembling a single-seat, scaled-down Su-27 (1997)

Модель Су-54

Model of an unarmed S-55, showing ventral strakes and LERX extending forward to radome (1998)

The original Su-54 advanced trainer (1999)

Проекты - участники конкурса: С-54, УТК-200, МиГ-АТ

Two-seat concept for Sukhoi S-54 with additional side view (lower) of S-55 (1997)