Pescatarian: Excludes foods of animal origin but includes seafood, eggs, and dairy foods. Semivegetarian, Meatless Vegetarian, Flexitarian: These terms define eating styles based on a vegetarian diet but include small amounts of red meat, poultry, seafood, eggs, and/or dairy foods.
Overhead Valve (OHV) Engines. With the OHV design, the valves are located above the combustion chamber. As the name implies, Overhead Valve engines (OHV) have the valves located above the combustion chamber, in the cylinder head. The OHV layout permits. 1  smoother fuel mixture intake, 2  quicker and more complete exhaust.
An APU is an auxiliary power unit.. On-board APUs are small jet turboshaft engines that are started to provide electrical and hydraulic power to the aircraft when needed during periods when the engines aren't running. Some aircraft are designed so the APU cannot be run unless the aircraft is sitting on the ground (governed by a weight on wheels switch). The entire aircraft can't be run off the APU, but all essential systems can be. By contrast, an EPU is an emergency power unit..