Glasflügel 604

The Glasflügel 604 was manufactured under severe time pressure in just four months for Walter Neubert and the 1970 World Championships in Marfa.

The Glasflügel 604 has a three-part wing of 22 meters wingspan. The outer wings come from the Kestrel and are somewhat shortened. This results in a center piece of 7.5 m length, for which the original 17% thick profile was thickened to 20% for static reasons. For reasons of strength, this middle section was quite heavy at 168 kg. The aircraft was supplied only with a special trailer, which allowed the easy attachment of this middle piece by means of a crane swivel device. The set-up weight of the entire aircraft is 440 kg.

The fuselage and tail units were also based on the Kestrel, but the dimensions had to be increased a bit. Thus, the fuselage is 0.88 m longer and also the mass balanced T-tail received increased area. These were only built between 1970 and 1973.

The prototype had the registration D-0604 and made its maiden flight on April 30, 1970. Dick Butler also became American Open Class Champion several times with his 604 (also the Protoype). Even at World Championships, the 604 was always at the forefront, and Walter Neubert held the world record for a long time over the 300 km triangle, which he flew at 153.43 km/h in Kenya in March 1972.  The prototype is a project in the USA today.