Month: June 2021

On a quadcopter configuration with 4 props: Upper left: clockwise prop on clockwise motor Lower right: clockwise prop on clockwise motor Upper right: counter clockwise prop on clockwise motor Lower left: counter clockwise prop on clockwise motor

People always wonder if a 550 will work on a standard RC car. In this video we have a Tamiya Hotshot equipped with a 7.4V 550 strong magnet motor. It is longer than a 540 but the Hotshot has enough room for it since there is nothing on the side that contains or covers the […]

Talking about brushed, the Tamiya Super Stock Motor RZ is a 23T stock motor intended for sprint racing and high-speed tracks: R.P.M. at best efficiency: 27,500rpm (7.2V) Torque at best efficiency: 500g-cm (7.2V) The TZ variant is intended for touring: R.P.M. at best efficiency: 26,500rpm (7.2V) Torque at best efficiency: 500g-cm (7.2V) The BZ variant […]

These photos show the inherent structural weakness of the Hotshot rear upper swing arm. The point that connects to the rear shock is very weak. Sadly there isn’t much you can do about such structure. You may, however, find STL files that are ready to print as replacement. But even with 3d print, you need […]

This type of rudder configuration is common. The possible rudder range of rotation is about 30 degrees. However, because it situates closer to the right, you will find that making left turn is relatively more difficult. To solve the problem you will need to make substantial modification to the rudder. As you can see from […]

For motor cooling of RC boat, using copper coil may be a better option if water inflow is not always consistent due to shallow water or insufficient speed. Copper itself is a metal that can dissipate some heat even with insufficient water passing through it. And it is less likely leaking water. There are ready […]

RTR boats often come with a low cost servo that is either too small or too unique. To make sure steering is reliable, you will want to use a standard size servo that is powerful enough to manipulate the rudder. In this video a FT 0 10 is shown. It has a uniquely sized servo […]

On shallow water with bottom full of rocks and stones, both the rudder and the propeller can easily break. What is worse is that if the rudder is stuck and you keep trying to turn, the small servo can fail. If your rudder has the potential to hit the bottom, consider to cut it shorter […]

If the dog bone shaft keeps falling off after landing a jump, a long term solution is to use CVD replacements. A cheaper quick fix is to shorten the upper linkage. By adjusting the upper linkage to make it shorter, the dog bone will less likely fall off. Another trick is to use zip ties […]