Speed was controlled by means of a throttle valve lever. The fuel mixture was provided by a Bing sliding throttle side draft motorcycle carburetor. Control is available using brake toggles for roll and a hand-held throttle for pitch. The accelerator pedal's communication is the same as Normal mode after 50-percent throttle. The engine efficiency is less than when the engine is operating at full throttle. The injectors reside one per cylinder and work with throttle bodies. The throttle (accelerator) linkage does not directly control the flow of liquid fuel. The lessons cover subjects such as cornering, throttle and brake control, and negotiating opponents. The engine can throttle down to 39% of its maximum thrust, or . Porsche's focus was on reducing internal friction to improve throttle response. Guidance includes control of the pitch axis and control of the throttle. However, the extra work done in pumping air through the throttle reduces efficiency. They are typically designed to attain maximum boost at full throttle. It operates with the use of a twisting throttle. It was one of the first vehicles to be fitted with an electronic drive-by-wire throttle.