How to build your own FPV drone racer?

Over the years, the popularity of UAV competition has steadily increased, from a small market in the consumer market to its own ESPN TV broadcasting alliance. For beginners and many intermediate users, participation usually involves ready-made pre assembled settings (RTF). However, as many pilots will tell you, the best drones are made, not bought, which means that at some point you will have to do it yourself. With DIY’s attitude in mind, we have taken a high-level look at how to build our own FPV drone racing car.

Now, since this is a high-level look, we’ll try to avoid more technical aspects and modifications, focus on what you need, and provide an overall build overview. Some instructions may sound out of reach (such as welding), but believe us, they are not. The great thing about building your own car is that with a little patience and research, anyone can do it, regardless of the technical level.

First, let’s talk about components. Regardless of the cost, occupation or skill level, the FPV drone has the same core components.

Air frame

This is the fuselage of your FPV drone. It’s where you connect and place all your components. The standard FPV racing car is an X-style, carbon fiber frame, in the 250 class. A good example of this is lumenier’s qav-x FPV racing quad.

propeller

These four rotating blades help push your four forces. Props have different styles, materials, blade counts, and different attributes. You’re going to have to try to figure out which prop works best for you, but a good start is a 5-inch, 3-bladed propeller. Brands like gemfan offer a wide selection of props and are a good place to buy blades.

Flight controller

This is your racer’s brain. All the signals go through the board and are converted into action. There are many good choices. We recommend brands such as lumenier or flydino, both of which provide controllers for championship games.

Distribution board (PDB)

This board specifies how power is distributed among your drones. In most products, the PDB connects directly to the flight battery and distributes power to other components. You can choose to buy a PDB, or, if you choose qav-x, a PDB will be included in the framework.

Electronic speed controller (ESC)

ESC controls the speed of each motor. The ESCs can be installed separately (1 ESC per arm), or you can use a 4-in-1 device, which requires less welding and can result in a cleaner installation. The compromise with 4-in-1 is limited placement options. If you draw your 4-in-1 ESC, the entire board must be replaced; for a single ESC, you must only replace the bad one.

Motor

The motor assembly is responsible for rotating your props and providing enough thrust to fly. When building a racing drone, you will need four brushless runner motors. There are many good options to choose from, including the lumenier mx2206-9, which we will use in this installation. We also suggest looking at t-motors. The motor they chose is a very popular FPV racing car, and for a good reason: the T – motor consistently provides excellent thrust, is not easy to overheat, and has a lightweight design.

Battery

Flying batteries power your four axis vehicle. It will always be a lithium-ion polymer (lipo) battery, and you may use a 3 second or 4S configuration. In our installation, we will use Tatu 4S 1300mAh LiPo battery with a discharge rate of 75 ℃.

Radio transmitter / receiver (TX / Rx)

The radio control system of your FPV drone is composed of a handheld transmitter and a receiving board, which we will install on the UAV itself. At least, your radio system must have at least four channels to properly control your four axis vehicle, but you really need at least two auxiliary channels to perform additional functions or trigger certain flight modes. For our installation, we are using Taranis x9d plus and X8R receivers, both from frsky.

Camera system

Your first person view settings include your FPV camera and video transmitter (TX). This is a crucial component because high quality video and video transmission are what makes FPV racing possible. Runcam is one of the best manufacturers of FPV equipment. We will use its swift Mini in our version.

Invalid ticket goggles

Your FPV goggles (headphones) receive video from the FPV TX, allowing you to see it in real time through the camera lens. Goggles don’t need any assembly, so we won’t cover them here, but when you buy your goggles, remember brands like fat shark and walkera, both of which are industry leaders.

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