Building my 1/4 scale Grunau Baby IIb

Edmund Schneider designed the Grunau Baby and built the first examples at his factory near the village of Grunau, in the Silesia region of eastern Germany. Today, this area is part of western Poland and Grunau is called Jesow. Schneider built the first Baby in 1931. It was a smaller version of the ESG 31 Stanavo, a sailplane designed during the same year for American pilot Jack O'Meara. Schneider used an innovative wing design patterned after the elliptical wings used on the high-performance sailplanes designed by the Academic Flying Group of the Darmstadt Technical University, the Akaflieg Darmstadt. Schneider's wing held a constant chord from the root to the aileron, and then the leading and trailing edges tapered to a rounded wingtip. To maintain control during a stall, Schneider designed the outboard wing and aileron with washout, or twist. On a wing with positive washout, the trailing edge of the wing curves up near the tips when viewed from the rear.

The Baby II B was nearly a perfect club sailplane. It was relatively easy to build from plans, it flew well, and the aircraft was strong enough to handle mild aerobatics and the occasional hard landing. Novice pilots could attempt their first real soaring, flying high and far, using updrafts generated by slopes and mountain ridges, and spiraling columns of warm air called thermals. Many Grunau Baby II B pilots achieved the coveted Silver-C soaring badge introduced in 1930. This required a pilot to remain aloft at least five hours, gain a minimum of 1,000 m (3,280 ft) after takeoff, and cover a horizontal distance of 50 km (31 miles).