 The sole prototype completed 66 test flights.Hall subsequently designed a more sophisticated development of the Model 116, with a more refined car body and a more powerful "flight" engine known as the Model 118 (which also bore the name "ConvAirCar").Two examples of the Model 118 flew in 1947 and after a crash of the first prototype, the second continued with the test program, but enthusiasm for the project waned and Convair cancelled the program.