The Glasflügel 604 is a West German high-wing T-tailed single seat FAI Open Class glider that was designed and produced by Glasflügel starting in 1970. Developed from the Kestrel 17 the 604 is often erroneously called a Kestrel 22. In fact the company never gave it a formal name beyond its number designation.
Made by Glasflügel.
It is the successor of the Glasflügel 401 .