It is a rule to have this in most competitions and a safety feature. Choose a Transmitter/Receiver When purchasing a receiver make sure that it has what is called "Fail-Safe operation".So consider making your robot shorter than your wheels so that it can drive upside down. Yes, the controls will be a bit backwards, but it can prevent you from losing the competition from being immobile. Another great technique to use in combat robots of any size is the ability to drive upside down. Be sure that the wheels can easily attach to the servos securely. It's recommended to use 2" diameter wheel. This means you have to have wheels that have a diameter less than this. Choose Wheels When choosing wheels, be sure to remember the rule that says the robot has to be able to fit within a 4"X4"X4" cube.Try getting stronger gears made out of metal. If you use nylon gears and the motor gets a lot of stress, the gears can strip out over time.
Another thing to consider when looking for a weapon servo is the type of gears. It's recommended to get a micro servo with extremely high torque so it can flip other robots with ease. However, if you are creating a flipper weapon, then you want to use a servo. It's not recommended using a spinning weapon for your first antweight because they can be difficult to build and balance properly. a spinning weapon), then you should get a geared DC motor (Brushless generally works better, but brushed would work) with a speed controller. If you have a weapon that needs to move really fast (i.e. aren't creating a "pusher"), then you probably need a motor to move the weapon. Choose a Weapon motor If you have an active weapon (i.e.Sometimes they have different sizes than the HiTech brand. Futaba is a different brand that makes servos. If you cannot find a servo that suits your needs perfectly, consider checking out another section on that site that sells "Futaba" servos.It's recommended getting high torque servos for combat robots instead of high speed so it's easy to push other robots around, even if you have a separate weapon. Be sure to make sure the servo is 360 modifiable. You should look for "micro" servos because they will save you a lot of weight. Choose Drive Servos It's usually recommended using servos instead of motors for an beginner's antweight because with servos, you do not need a speed controller which saves money and precious weight on your robot.If something doesn't fit or doesn't work while you are still designing, you save money because you can switch parts now. Just choose your parts and design accordingly. Choose Your Parts.Yes, you need to choose your parts before designing.