The TST-13 Junior is a single seat all composite motorglider based on the 15 m TST-10 wing utilizing a Rotax 447 or 503 engine. With the Rotax 447 engine only a fixed propellor is available resulting in an engine off glide performance of 24:1.  With the Rotax 503 engine, a featherable propellor is available that increases glide performance to 32:1. More detailed performance specifications and type specifications are available.  If interested in more detailed photos of the construction process, click here.