Jane's Encyclopedia of Aviation
Spratt Model 107 (USA)
Two-seat lightweight flying-boat with pivoted controllable parasol wings. Plans are available to amateur constructors.
Spratt Model 107 two-seat homebuilt flying-boat (80 hp Mercury "800" modified outboard marine engine)
Spratt Model 105 landplane built and owned by Mr Robert Quaintance of Coatsville, Pennsylvania
Spratt Model 105, landplane counterpart of the Model 107.
The George Spratt two seat Controlwing. The designer claims his aircraft is stall and spin proof.