Most Interesting Formation Flight at Oshkosh? Perlan 2, its Grob Egrett tow plane, and sponsor Airbus gave AirVenture 2022 attendees a glimpse of future records and promising technology. Few people outside the Perlan Project have witnessed these two-planes flying in close formation, linked by a tow rope. Initial attempts to get Perlan to an altitude where it could catch high-level mountain waves were hampered by the relatively slow climb of the conventional high-wing craft. Because Einar Enevoldson, founder of the Project, had been a test pilot for the Grob aircraft works in Germany, he had reached a record altitude of 60,867 feet in their Stratos 2C, a twin-engine research craft powered by triple-supercharged Teledyne engines. The Stratos is the highest flying piston-engine airplane. Its single-engine cousin, the Egrett flies behind a turboprop engine, though, which enables towing the Perlan to the stratosphere for its final search for record altitude. Spectators at AirVenture got a small taste of that stratospheric adventure, …
