| Speed thrills and that is why fast electric rc cars are | | | | Where P = Pressure |
| popular among radio controlled hobbyists. But did you | | | | V= Velocity |
| ever wonder how much effort goes into designing a | | | | The relationship above means that on a surface like |
| system that goes up to once unimaginable speeds that | | | | that of your fast electric rc cars body if the velocity of |
| we are now accustomed to. | | | | air increases then the pressure exerted on that |
| Simply put it's immense. | | | | surface would reduce. |
| There are so many aspects of making fast electric rc | | | | Now let me make it more lucid for you to understand. |
| cars that are responsible for the kind of speed that | | | | You have two surfaces of your rc car. One is the top |
| they are designed for. One of those very important | | | | surface and the second is the bottom surface. When |
| parameters is the aerodynamics of the car body. You | | | | the car rushes through air in one direction essentially air |
| will see how and why the aerodynamics of a fast | | | | flows along the surfaces in opposite direction. |
| electric rc car plays such a pivotal role in designing the | | | | However because of the design it so happens that the |
| vehicle. | | | | speed of air flowing through the top surface is slower |
| Aerodynamics is basically the study of forces that | | | | as compared to that of the air flowing along the |
| come on a body when it travels at a great speed | | | | bottom surface. As per the principle above with |
| through a medium especially air or atmospheric air. This | | | | decrease in speed the pressure on top surface |
| word is mostly used in context of aeroplanes, rockets | | | | increases. This increase in top surface pressure |
| and spaceships. But then it becomes equally important | | | | greatly improves the stability of the vehicle while |
| in case of fast cars. | | | | running at high speeds. It pushes the car down which in |
| Basic Governing Principle | | | | turn provides the traction needed for smooth running. |
| The principle that forms the basis of aerodynamic | | | | RC sprint cars have a very high speed to weight ratio. |
| study is the Bernoulli's theorem. It says that the total | | | | Thus it is very important for them to have a design |
| energy at any point of flow will always be constant. | | | | that is favorable and can take care of the |
| However energy will change from one form to | | | | aerodynamic forces to come up with a much more |
| another. For e.g. potential energy may be converted to | | | | stable rc car. |
| kinetic energy or heat or some other form of energy | | | | Overall aerodynamics plays a very important role not |
| without disturbing the total amount of heat. | | | | only in case of fast electric rc cars but also in many |
| On a closer mathematical analysis you will find the | | | | other areas like real life cars, aeroplanes, rockets, sail |
| following relationship. | | | | planes, missiles, fighter aircrafts etc. |
| P α 1/V | | | | |