The Akaflieg Braunschweig SB-13 Arcus was an experimental tailless, single-seat, Standard Class glider designed and built in Germany in the early 1990s.

[1] In 1982 when the SB-13 design was first discussed no new tailless glider had been built for thirty years, during which time glass reinforced plastic materials had replaced wood in glider construction and much learned about laminar flow wings; it was hoped that tailless designs would be lighter, simpler and cheaper.

Because of the novelty of the layout, a one-third scale model of the early design was built and flown, revealing several serious problems.

With the centre of gravity too far forward, a rapid longitudinal "pecking" oscillation set in, which was difficult to control due to its short duration.

Elevons occupied much of the outer panel trailing edge and, further inboard, mid-chord mounted airbrakes were fitted.

Over the next few years, several aerodynamic devices were tried, some of which at least improved the behaviour of the Arcus; one longer-lasting outcome from the project was the start of an investigation into whole aircraft rescue parachutes.