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.
These are often made by the Estes company. Inside the cardboard engine tube is a propellant with a hole in the middle for the igâ¦niter. Often the propellant is Black Powder. Higher power model rocket engines use a composite propellant (similar to what NASA used for the Shuttles). Many of these types of engines are reload-able and reuse-able.