As part of the Russian Su-57 Felon flight test programme, Su-57 with bort number 058 blue, took of without canopy!

The test is named "cockpit habitability trial’ and is set up to test the emergency escape procedure.

The Russian Federation - Aerospace Forces (RF VKS) Su-57 is assigned to the 929th V.P. Chkalova State Flight Test Centre at Akhtubinsk air base (Russia).