RC propellers play many roles in an RC airplane, especially those that are based on scale models of real world airplanes. Whether it is RC airplanes or RC helicopters, the role of an RC propeller remains to create lift and thrust for the model to move ahead when in the air. A concept that has been accurately duplicated from real world planes and helicopters, today, RC propellers are an integral component to almost all RC aircraft.
RC propellers are available in different shapes and sizes to suit almost every RC model that you can imagine. While most RC models are available with their RC propellers, you might need to buy one separately especially if you damage the one that came with your model. In case of bad landings and crashes, RC propellers are usually the first things to bear the brunt as they stick out of the normal shape of the body of an RC model.
When looking to buy an RC propeller, you can easily find what you are looking for in model stores or even hobby stores. They are available in many different shapes and sizes and while many models require specific RC propeller models that can fit the bill, there are many generic propellers that can fit other generic airplane models.
Plastic is a common material that is used to make RC propellers. Light and strong, plastic is ideal for most models that are also built of the same, or similar, material. Wood is also used quite frequently although if you are looking for something really reliable and effective, you should consider RC propellers made of fiberglass, which can be a bit heavy, or carbon fibre, the most expensive and strong variety.
RC propellers are usually distinguished on the basis of two numbers, the first of which denotes their thickness while the other denotes their pitch. The second number is also, at times, denoted as the number of inches a model would travel with one single rotation of the propeller. For e.g. a propeller with 5x3 markings would mean that the propeller, with a 5-inch diameter, would carry the model 3 inches with one rotation.
RC propellers are used in almost all kinds of RC planes while boats and helicopters also use RC propellers as their propulsion equipment. In boats, these propellers are usually positioned under water while some models such as swamp boat scale models have propellers above the water, which drive air through to propel the boat. Helicopters also require RC propellers which act as the main rotor while the smaller versions form the tail rotors.
An essential feature of RC airplanes, helicopters and boats, these RC propellers are key to performance and power that is generated by these models. Simple to attach and easy to replace, RC propellers need to be understood if you are to take up a hobby in RC aircraft and boats.