 The first trial showed the aircraft to accelerate well under the power of the water propellers, but after a short run the streamlined fairing of the hydropeds was torn away, ending the tests.Subsequent static tests revealed a vibration problem in the drive assembly, and while this was being examined trials were made by towing the aircraft behind a torpedo boat.Problems with stability were partially cured by minor changes to the parafoil lifting planes and the addition of a controllable water elevator and rudder to the aft hydroped, resulting in satisfactory towing characteristics, but when the water propellers were used the torque reaction caused the aircraft to heel over.