The Oberlerchner Mg 19 Steinadler (English: Golden Eagle) is an Erwin Musger designed two seat tandem trainer glider built in Austria and first flown in 1951. Several examples of this successful aircraft, which competed in the two seat class at two World Gliding Championships in the 1950s, were still flying in 2000.
In the 1930s Erwin Musger was a prominent Austrian glider producer. His first two-seat design was the gull wing Musger Mg 9, which set a world duration record in 1938. The Oberlerchner Mg 19 was a post-World War II development of the Mg 9, financed by the Austrian industrialist Joseph Oberlerchner, with a mid/low rather than high wing. The change of wing position was primarily made to enhance the upwards view from the rear seat, which on the Mg 9 was blocked by the wing. The wing roots are carefully faired into the fuselage to avoid airflow turbulence and the 10° of dihedral on the inner third of the span takes the wing tips well clear of the ground, even though the outer panels had only 2° dihedral.
Like the rest of the golden eagle, the two part cantilever wings is wood framed and covered in a mixture of plywood and fabric. Each part is built around a single spar, with ply covering ahead of it around the leading edge forming a D-shaped torsion box. Behind the spar the wing is fabric covered, except for small areas near the root and near the tip, where the aileron hinge angles in towards the spar, that require strengthening. On the earliest model, the Mg 19, the ailerons fill the trailing edge from bend to tip but such a large area produces heavy control loads and on the Mg 19a the ailerons are reduced in length by about a third. Schempp-Hirth airbrakes open above and below the wing just inboard of the bend at 44% chord. In plan the wing has a straight and swept leading edge. The trailing edge is also straight inboard of the ailerons, where the tips become semi-elliptical. A 1° sweep at one quarter chord produces a swept spar to allow the two ends to meet just behind the rear seat.
On the later models the gull wing is replaced by one with a constant 5° dihedral without altering the tip ground clearance, although the clearance with extended airbrakes is small. Otherwise the wing of the Mg 19b is unchanged. The wing of the World Gliding Championships contending Mg 19c is different, with straight tapered outer panels, small tip bodies and a section which is a blend of the laminar flow NACA 64-2015 airfoil and the older, proven Göttingen 549.
The Steinadler was used by many Austrian clubs and by 1963 had set most of the national two seat records. Several remained in service fifty years after the first flight and eleven remained on the Austrian civil register in 2009.
The sole Mg 19c took part in the World Gliding Championships of 1956, held at Saint-Yan, the last WGC to have a separate category for two seaters, but did not finish in the top six.
Product Features
- Laser Cut Balsa Kit
- Complete Kit with full Wood supply (No Short Kit)
- Classic Glider
- Steuerung über Seiten-, Höhen- und Querruder
- Ausführliche, bebilderte Bauanleitung
- Kleinteile, Anlenkungen
Specifications
- Wingspan = 2933mm
- Length = 1350mm
- Weight = ca. 2100g
- Wing Area = 57dm²
- Scale = 1:6
Needed to complete :
- 6x Servos
- Brushless Motor BOOST 40 LS
