By Mandolyn McAbeE, Airwaysmag.com Russian aircraft manufacturer Irkut will begin deliveries of its new MC-21 airliner by the end of 2021. Irkut has 175 firm orders for the type. Aeroflot (SU), Russia’s flag carrier, will be the launch customer. The MC-21 is a single-aisle twinjet aircraft inten...