Posts by Technical Editor

The characteristics of good propellant are as follows- It should have specific impulse (thrust delivered divide by the rate of propellant burnt). It should produce low molecular weight. Non-toxic gases…

Liquid fuels easy to handle, store and transport. They occupy less space. The combustion is cleaner and has higher colourific value than solid fuels. However, they are more expensive. They…

Internal combustion (as in compression ignition engine). The fuel-air mixture is ignited in the cylinder either by an electric spark (as in ignition engine) or by compressing air (as in…

The propellants are classified depending on their physical into solid and liquid propellants Solid propellants are classified as homogeneous and heterogeneous propellants homogeneous solid propellant is solid propellant or mixture…

The purification of oil is carried out in the following three steps- Demulsification Crude oil is a stable emulsion of oil in water and water in oil types. The emulsion…

The term propulsion is derived from two Latin words: pro meaning before or forward and pellere meaning to drive. Propulsion is a means of means of creating force leading to…

In oceans, a temperature difference of 200 C exists between deep cold water and surface warm water. The warm surface heats and vaporizes low billing liquid like ammonia (NH3) or…

Advantages of tidal energy It is pollution free. It greenhouse rate greenhouse gases or solid wastes. It is inexhaustible and independent of rain. Tides are more predictable than wind. It…

Tides are periodical rise and fall of sea water level. It is caused due to the gravitational pull of sun and moon and the rotation of the earth. During high…

Advantages of wind energy It is a renewable source of energy. It is non –polluting hence does not give rise to greenhouse gas or solid wastes. It has low running…