The БОР (Russian: Беспилотный Орбитальный Ракетоплан, Bespilotnyi Orbital'nyi Raketoplan, "Unpiloted Orbital Rocketplane").
Another spacecraft to use the Spiral design was the BOR series, uncrewed sub-scale reentry test vehicles.
American analogs X-23 PRIME and ASSET.
Several of these craft have been preserved in aerospace museums around the world.
The БОР (Russian: Беспилотный Орбитальный Ракетоплан, Bespilotnyi Orbital'nyi Raketoplan, "Unpiloted Orbital Rocketplane"). Another spacecraft to use the Spiral design was the BOR series, uncrewed sub-scale reentry test vehicles. American analogs X-23 PRIME and ASSET. Several of these craft have been preserved in aerospace museums around the world.
Mikoyan-Gurevich MiG-105