GLL-8 (GLL-VK), nicknamed "Igla" (eng. needle), is a Russian flying hypersonic laboratory. It saw its first flight in 2005.
Purpose
The purpose of this "flying laboratory" is technical data study of hypersonic speeds, which cannot be done with average engines, and other manned experimental flight-craft. This study includes the following:
References
GLL-8 (Gll-VK) Igla Wikipedia(Text) CC BY-SA