Does a powerful RC car spin its tires like a real powerful car?
Are powerful RC cars All Wheel Drive?

SOME RC cars will indeed spin the drive wheels, but those cars are far from the $10 class, more like the $10 per wheel class.

Sounds like gearing ratios too high,, try the motor on a lower voltage..

My guess is that the jerking is certainly NOT a cogging effect but instead that the motor under load draws enough current to put the drive circuit into an overload shutdown mode of some sort. Then when the voltage drops the motor switches back on.

I am having a competition with friends where we buy cheap $10 RC cars. Modify it and then race it. I’ve only taken a semester of circuits but not enough time to learn it all. I am very interested in circuits and thought this could be a learning experiment. I wanted to push my cars motors to its limit without worrying about the motors lifespan.

1. What I first did was take the rc car completely apart and add one double A battery in series with the other 3. With this I could definitely notice a huge power increase but felt too easy.

2. I ordered a boost converter and used a 9V battery to power it. The output I set at 12V to the circuit board then to the motors. What I noticed is that the rc car seemed to surge but not go anywhere. Noticed measuring current going into boost converter was higher than current leaving the boost converter but voltage being higher. I believe resistance is constant so voltage is directly related to current. (Higher current = voltage) but seems to have an issue working.

3. The last option I haven’t tried is using an H bridge.

I have already ordered other motors but what else can I do to make my rc car faster?

A really serious upgrade will be to replace the AA batteries with a pair of lithium batteries that will deliver about 4 volts each. They do weigh a bit more and cost a lot more but they can deliver a lot more power. Recharging them is more complex and there are serious limits with recharging voltage and current, but they will certainly provide a lot more power. You can also try them in parallel to provide twice the current.

 

Hello,

As @MisterBill2 said, Lithium batteries will be more powerfull.
There are 11.1 Volts (3S) versions around:
https://www.google.com/search?as_st...hUKEwiqyOae4sbmAhUSrosKHd0bCT4Q4dUDCAY&uact=5

I would buy a lithium battery with the charger for it.

Bertus

 

Running the motor on 8+ volts instead of the 4+ volts from the three AA cells will be a serious boost in performance and probably not burn up the controller. But at some point it will not be able to handle more power. Let us know what happens.

 

A non-electronic approach is to increase the holding force of the wheels against the racing surface. In the 60’s, we world replace the tires with hard foam tires. Additionally, we would soak the foam tires in motor oil. Counter-intuitive? The oil would slightly rot the tires. After soaking for a couple of days, we would wash the tires in something like Lestoil to remove the oil. Then, the softened tires would grip the track and efficiently use the motor torque.

Torque is what you want first; speed second.

Good luck!

 

Certainly at some point there will be enough torque to spin the wheels and at that point you will need to improve the traction. So now for a question: Are there any rules to this competition? Many times the rules get in the way of really high performance, but in the unlimited class it is mostly the expense.
So please let us know about whatever rules there are, and a bit about the actual racing course, since drag racing, circle track racing, and speed record challenges are three totally different things. And probably road course racing also. What will work on a drag strip will not be useful if the cars need to corner very well.