The development of the Lo-170 was started in 1960. It was intended as a modern 171NaN1 wingspan cross country sailplane for production by Schempp-Hirth.
The forward fuselage was built from welded steel tube, surrounded by a fibreglass skin. The wing was built from plywood in a negative mold and then covered with fibreglass. The wing uses a Wortmann FX 61-184 airfoil.[3]
Schempp-Hirth decided to produce the Schempp-Hirth Standard Austria and its FAI Open Class variant Schempp-Hirth SHK instead and as a result only one Lo-170 was produced.
The aircraft was converted to a motor glider in 1972, with two wing-mounted engines. Plans included increasing the span to 201NaN1.