In epicyclic gearing one or more of the gear axes moves. He began wearing hats and sports jerseys as part of his ring gear. The deck above the steering gear and rudders was thick. They employ a single fixed rear gear, or cog, that does not freewheel. It has a retractable tricycle landing gear and a hydraulic flight control system. A quicker 17&colon;1 steering gear was also used. Each was mated to a 4-speed automatic transmission with a 0.70&colon;1 overdrive gear. The landing caused parts of the landing gear to break. Airsoft is safe when played with proper protective gear. It uses two separate clutches for odd and even gear sets. This was at the expense of more complicated valve gear and increased maintenance requirements. During periods of exercise PT Gear is worn. Aluminum has also replaced steel on gear tooth surfaces. However, the cable parted after "Audacious"s steering gear failed. Some aircraft with retractable conventional landing gear have a fixed tailwheel.