TECHNICAL SUPPORT
Published 2026-03-28
Friends who play model airplanes all know that installing the steering gear correctly is the key to whether the aircraft can fly obediently. Many novice friends got a bunch of parts and looked at theservoand didn't know where to start. Today we will talk about the installation process and explain the steps clearly so that you will no longer have difficulties.
Before you start, get everything ready. In addition to our protagonistservo, you also need a suitable screwdriver, usually a cross or a slotted screwdriver, which must match the mounting screws that come with theservo. Additionally, small pliers, zip ties, double-sided tape, or even a short piece of heat shrink tubing may come in handy. Keeping these tools on hand in advance will allow you to complete the installation in one go without having to search around to interrupt your thoughts.
Another thing is to clearly understand the type of aircraft model you have. The installation methods of the servos of fixed-wing and multi-copter aircraft are very different. Fixed wings require the servos to be embedded into reserved slots in the wings or fuselage, while multi-axis systems may only need to be simply fixed on the center plate. Study the aircraft manual in advance or observe the fuselage structure to determine the installation position and direction of each servo. This can avoid the embarrassment of installing and removing the servo backwards.
The most common fixing method is to use self-tapping screws to lock the servo to the mounting base. First put the servo into the slot of the fuselage, check whether the ears at the four corners fit properly, and then use a screwdriver to screw in the screws. Here's a little tip, don't tighten it too much at once. Let the screws take hold first, and then lock them completely after adjusting the position. If there is an empty space in the installation slot, you can place a small piece of foam or plastic sheet to ensure that the servo does not shake.
For aircraft that do not have reserved mounting slots, you have to use some thinking. You can use hot melt glue or 3M double-sided tape to directly stick the servo on a flat surface. This method is especially effective for lightweight foam machines. Before applying the glue, remember to wipe the adhesive surface clean to ensure there is no oil. If you are worried that it is not strong enough, use a tie or fiber tape to reinforce it. Double insurance, you don’t have to worry about the servo falling off even if you fly fiercely.
After the servo is installed, the next most critical step is to install the rocker arm. First power on the servo, let the remote control return the servo to the center, and then install the rocker arm at an angle as vertical or horizontal as possible. This is done so that when the servo is in the initial position, the rocker arm angle is most suitable, leaving enough travel space in both directions. When installing the rocker arm, if you find that the teeth are not aligned, do not press hard. Pull out the rocker arm and turn one tooth and try again.
The adjustment of the connecting rod determines the neutral point of the rudder surface. After fastening the ball head or Z-shaped head to the horn of the rocker arm and the rudder surface, use pliers to fine-tune the length of the connecting rod so that the rudder surface is just horizontal when the servo returns to center. Spend more time on this step and you'll find that you'll save a lot of trouble when fine-tuning your flight attitude in the air. After adjustment, don't forget to tighten the stop ring or locking nut on the connecting rod to prevent the length from changing due to vibration during flight.
Be careful during the wiring process and read the channel identification on the receiver clearly. Generally speaking, the aileron is connected to channel 1, the elevator is connected to channel 2, the throttle is connected to channel 3, and the direction is connected to channel 4. However, this is not absolute and depends on your remote control settings. When wiring, pay attention to the direction of the plug. The signal wire (usually yellow, white or orange) should face the signal terminal on the receiver. If it is connected incorrectly, the servo will not work.
The wires are connected, all that's left is routing. In order to make the interior of the aircraft look tidy and to prevent the wiring from being worn by sharp edges of the fuselage, the wiring harness can be fixed with zip ties. If the wire is too long, do not fold it and bundle it into a ball, which may cause interference. It is best to fix it in the cabin in an "S" shape. Straightening the wires will not only reduce electromagnetic interference, but also allow you to tell at a glance which wire is connected to which servo when repairing and replacing parts in the future.
The hardware is all installed, and the most important thing is to set up the remote control. First, create a new model in the remote control and select the appropriate model. Then enter the servo stroke (EPA) menu and adjust the stroke of each channel to about 100%. Next, check whether the direction of the rudder surface is correct. If you pull the lever and the rudder surface runs downward, it means the direction is reversed. Just switch it in the channel reverse (REV) menu of the remote control.
The next step is to set the rudder amount (D/R) and exponential curve (EXP). Novice friends can first set a softer curve, such as 70% rudder volume and 30% index, so that the rudder surface response will not be too sensitive. Even if you accidentally hit the stick too hard, the aircraft will not lose control instantly. These are the key settings to make your aircraft "obedient". Don't skip them. Spending ten minutes adjusting them is much safer than having to adjust them hurriedly after you get into the sky.
The first common mistake is to ignore the "back to center" step before installation. Many friends directly press the rocker arm onto the servo. As a result, the left and right strokes of the servo are uneven, with one side reaching the bottom and the other side still remaining largely unmoved. The correct approach is that every time before disassembling the rocker arm, you must first turn on the power to return the servo to the mechanical neutral position. This little habit can make your aircraft fly more symmetrically.
The other is that they are afraid of trouble, the wiring is messy, or the screws are not tightened and they go up. High-frequency vibrations during flight will slowly pull out the loose screws, which may result in loss of control in the air. Finally, don’t forget to do a full-function test. Move all the rudder surfaces repeatedly to confirm that there are no jams or abnormal noises, and that the screws and connecting rods are locked. Don't rush to fly. Spend an extra five minutes on the ground doing inspections and save hours of repairs. When installing the servo, have you ever suffered a loss because you failed to pay attention to any small details? Welcome to share your experience in the comment area so that more friends can avoid these pitfalls.
Update Time：2026-03-28
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