Published February 21, 2012 | By admin SOURCE: RIA NOVOSTI The deliveries of new close air support aircraft to the Russian Air Force will start by 2020, Air Force spokesman Col. Vladimir Drik said. â€œThe Air Force units will start receiving this aircraft by 2020,â€ Drik said on Monday. â€œIt will gradually replace highly-reliable Su-25SM Frogfoot attack planes.â€ According to Drik, the new aircraft will meet the demands of modern warfare and feature elements of â€œstealthâ€ technology, the whole range of tactical weaponry, modern radar and navigation equipment. Meanwhile, Russia will continue to upgrade its outdated Su-25 attack aircraft to Su-25SM version, which has a significantly better survivability and combat effectiveness. The Russian Air Force currently has over 30 Su-25SM planes in service and plans to modernize about 80 Su-25s by 2020, Drik said.