140mm FPV Racing Drone Part 1 – Build e Assemblaggio

Hello everyone, I'm Mirko, and today we'll see how to assemble a 140mm quad Let's see immediately the components that I will use in this build Motors will be HGLRC FLAME 1407 of 3600kv They are mid-range motors, they are not the best on the market but have a good quality – price ratio ESC will be Racerstar 4 in 1 20A v2

Amperage is sufficient to manage motors and Dshot protocol guarantees us a good performance Flight controller will be a Betaflight F3 Nowadays Flight Controllers that go for most are F4 however I was satisfied with the performance and reliability of this Betaflight F3 As for CAM and VTX I will use a Runcam Micro Sparrow combined with a Runcam TX200 The Micro Sparrow has excellent video quality and combined with the TX200 we also have the VTX with low weight I will replace the dipole antenna with an omnirectional so as to have a better video quality The receiver will be a Frsky XM+ that guarantees us a great range

Frame will be a Realacc Real1MS 140mm as you saw from my review I was not satisfied with the screws provided I took this screws set from the Suleve We find M2, M25 and M3 screws in various lengths a set of screws so assorted always comes in handy, so I recommend buying it In the description you will find the playlist with everyone the components I will use in this build You find how to assembly the frame and configure the VTX; reviews of motor, ESC and flight controller

Also find videos dedicated to XM +, how to bind it, how to update it and how set OSD on betaflight The tools necessary to build ours quads are soldering iron, tin and screwdrivers We will also need zip tie, heat shrink, tweezers and clippers or scissors It will also be useful to have nylon screws and standoffs and a third hand to help us solder First we assemble the frame, in description you will find the link to the review of this frame where I explain step by step how to assemble it

For now we only assemble the main body and the upper part without joining them Now we arrange board on frame, we will use screws supplied to us with ESCs if you have metal screws you can use them to guarantee greater resistance So we put the screw, the washers, the ESCs, these 6mm hexagonal stand offs, the flight controller and the nylon nuts For the moment we only fix the esc, we keep flight controllers and nuts on one side for later With the quad facing upwards, make sure that the power cables are on the left and the connector for the signal cables at the top Now let's mount motors on the frame, we use 8 long screws of the Suleve kit for reinforcing arms and 8 screws that are given with the motor for the other holes Final result will be this We fix the motor cables to the frame with zip ties Now pretin all the 4 in 1 ESC pads We connect the motor cables like this, passing this cable inside and soldering it in the farthest pad central cable is wsoldered to the nearest pad and the external cable we solder it in the central pad This operation requires a bit of skill if you do not feel like cutting the custom cables you can leave the cables as they are and solder them making them pass from the inside After connecting all the motor cables we add the flight controller to our quad Betaflight F3 must be installed with the arrow pointing forward In this phase we connect the ESCs power supply to flight controller We turn the Flight Controller by rotating it forward I recommend it is important to rotate it forward and not to the side

Cut the power cables to about 3 centimeters After pre tin wires and flight controller pads we connect ground on the pad – and the positive on pad + Since we have the board turned in this direction we verify receiver and VTX power supply To operate XM+ it needs 5 Volt so make sure that here central pad and the 5V pad are bridged by default the board is set this way Even the Runcam TX200 needs a 5 Volt power supply By default the board is set to provide direct battery voltage in the RAM pad At this point we can choose whether to move the bridge to provide 5 Volts to the RAM pad or directly use the pads below that are set to 5 Volts I will use the pads below, in this case be careful not to connect it to the RAM pad because the direct voltage of the battery will irreparably damage the VTX We use the cables we have cut from ESC to connect the battery to the Flight Controller we start by connecting the positive cable Once finished we report the flight controller in its original position We fix the Flight Controller with the 4 nylon nuts and we wsolder the negative cable for the battery Now we connect the ESC signal cables to the Flight Controller The cables are arranged in sequence, we have the signal number 1, 2, 3, 4 and the fifth cable is ground We will connect these cables respecting the order of Betaflight engines, ie 1, 2, 3, 4 and ground After pre tin and cutting the cables up measure we can solder Now we connect camera and VTX to flight controller

To display the OSD we cut the yellow cable and connect the part that is in the connector in the VIN and the part that is in the VTX in the VOUT Since the yellow cable is very short, we recover the ESC signal cables We also cut this JST connector and connect the red cable in the 5 Volt and the black in the ground I soldered yellow cable to the CAM and the orange cable to the VTX so we can connect it to the top of the frame Since the cam is smaller than the frame we use these 3 washers as thickness we put one with the original screw and two with a screw of the suleve kit I remind you that the washers are supplied with the cam The final result will be this if you have difficulty arranging the camera, remove the top of the frame before fixing it We fix the upper part to the frame for now we use only the two front screws so you can make the last connections

We solder CAM cables to the board following this pattern Connect the yellow cable to the VIN pad, orange at VOUT, red at 5V and black at GND We also connect the XM+ We weld 3 cables of about 35cm and with the receiver in this position we put a yellow cable for the SBUS on the left, the positive on the center and the ground on the right After we weld them in these pads respecting this order, in the flight controller these are below After having put the heat-shrink and soldered the XM +, we fix it with a zip tie Now I replace the stock antenna of the VTX with this omnidirectional We use heat shrink to isolate the metal part We fix the omnidirectional antenna by placing two intersecting zip ties that we will also use to fix the XM+ antennas We put the last 2 screws to close the frame and cut zip tie to the antenna size finally we protect receiver's antennait with the heat shrink To conclude, we solder the connecter I will use an XT60, you can also use an XT30 depending on the batteries you will buy

Finally, we fix the cables to the frame with a zip tie to prevent wires from tearing off after a crash Weight is 172 grams his was my build of the 140mm quad in the next video we will see the complete configuration of all the components Thanks for watching the video, please like and subscribe You can also support me on Patreon by clicking the link at the end of the video

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