The MiG-25 was one fast mother, despite having to change those huge engines often... It did achieve a world record in altitude. Read more about the design and

The MiG-25 was one fast mother, despite having to change those huge engines often... It did achieve a world record in altitude. Read more about the design and construction here: http://www.globalaircraft.org/planes/mig-25_foxbat.pl http://www.globalaircraft.org/planes/mig-25_foxbat.pl