Abstract: Electrical signals from a vehicle distributor are processed by a pulse geating circuit. Generated pulses are integrated to form an analog signal which is linearly proportional to engine speed. The analog signal is algebraically summed with an analog signal derived from a vehicle accelerator pedal. A resultant summed signal is fed to a voltage controlled one-shot which produces output pulses having a constant amplitude with a frequency proportional to the engine speed. The width of each pulse is inversely proportional to the engine speed. The integral or the area under the pulses derived from the voltage controlled one-shot remains constant, the pulses being fed to a fuel injector that injects fuel into a vehicle carburetor in a manner maintaining a constant engine speed regardless of load.

Abstract: A tow device for small planes and the like having a frame having front and rear ends and opposing sides. Front and rear wheels are rotably mounted on the frame and a means to power the wheels is provided. A winch driven by the power means extends rearwardly of the front of the frame and the rear end portion of the frame has an inclined ramp extending downwardly and rearwardly from the frame towards the ground. A stop plate is positioned forward of the ramp to engage and hold securely the front landing wheel of a towed airplane.