The S-19 is a low wing monoplane of traditional aluminum construction, featuring a constant chord wing. This provides significant advantages in airframe construction and a good stall characteristic. The horizontal tail is a stabilator.
The S-19 is powered by a ROTAX 912 ULS engine producing 100 HP. The engine has proven itself reliable in years of operation. Other engine options will be explored, from Jabiru to Lycoming. The aircraft seats two in side by side in a 43.5" wide cockpit. Headroom is ample for even 6'4" pilots, and even larger with slight modifications.
The visibility over the nose is excellent due to the relative upright seat position. Baggage space is more than expected (enough space to carry two folding bikes!) Baggage can be carried in a 13 cubic foot compartment behind the seats with a loading capacity of 70lb. This already large compartment can be extended to the rear for approximate 9.5 cubic foot additional baggage space with a loading capacity of 30 lb.
The S-19 structure is of "monocoque" (stressed skin) carrying most of the strength through the aluminum skins. The skins are sufficiently supported with internal structure like bulkheads and stringers to maintain shape.
The airplane is built very sturdy and should provide a "lifetime" service with adequate maintenance.