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Thread: rc racing invention

  1. #1 rc racing invention 
    Forum Bachelors Degree
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    i'm participating in a group that races RC cars. there are just a few simple rules for your vehicle:

    you may custom build any part you would like to, or have custom parts donated by others.

    you can't screw with the motor or battery

    you can change the wheels any way you like but cannot add extra powered propulsion, like a rocket pack or some rubbish.

    you may purchase any non custom built parts

    you may not purchase custom parts.

    the basic idea is to try to make money a somewhat insignificant factor. more about the driving and science behind the cars.

    one of the main problems we've encountered is that during the turns in the track we have to slow down with the brakes or try to drift through it(difficult and rather unreliable, one patch of high friction or low friction in the track will throw you off course).

    so, i was thinking of some way to keep the engine running and build up stored energy while traveling around the turn, but once out of the turn being able to release the energy through the wheels. someone want to help me brainstorm and perhaps refine the idea? we have access to technology to build our own parts, so even an outlandish idea shouldn't be a problem if it fits on the chasis and doesn't weigh too much.


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  3. #2  
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    I know nothing about RC cars, but if it's electric, then the braking is probably done with the motor. That being the case, if you wanted to keep your electric motor going full speed all the time, you would need a different braking system. Or am I misunderstanding the design?


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  4. #3  
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    you understand the design perfectly. the braking system involves running the motor as a generator. it slightly recharges the battery, but that energy equates to longevity of the engine(not an issue) rather than speed(what i'm looking for).

    i was considering scrapping the brake system all together and replacing it with a back tire E-brake and a system for storing the energy using an elastic band.

    the diagram is quite complex for me to try and describe, so i'll take any recommendations and try to put the whole thing on a paint document in the meantime.
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    biology: accurate if chemistry is accurate, somewhat subjective, fascinating
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  5. #4  
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    i've decided to scrap the whole idea of using an elastic as it uses up more space and mass than i'd like and is overly complicated to make custom.

    however rather than store the energy in an elastic band i was considering putting a capacitor between the battery and motor in the circuit to store electrical energy when going around turns or whenever you're not hitting the gas. this method stores the energy more efficiently and does not require the scrapping of any current functions in order for it to work.
    physics: accurate, objective, boring
    chemistry: accurate if physics is accurate, slightly subjective, you can blow stuff up
    biology: accurate if chemistry is accurate, somewhat subjective, fascinating
    religion: accurate if people are always right, highly subjective, bewildering
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  6. #5 Re: rc racing invention 
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    Quote Originally Posted by saul
    so, i was thinking of some way to keep the engine running and build up stored energy while traveling around the turn, but once out of the turn being able to release the energy through the wheels. someone want to help me brainstorm and perhaps refine the idea? we have access to technology to build our own parts, so even an outlandish idea shouldn't be a problem if it fits on the chasis and doesn't weigh too much.
    I have a thought that I considered applying for a patent on, but for real cars that does that. At that scale, the machining of custom parts would be next to impossible for the way it works. If you can have four independent motors somehow to each wheel, I would suggest that, and a circuit that controls the power to each wheel. Consider it dynamic yaw control.

    the rules are confusing.

    you may custom build any part you would like to, or have custom parts donated by others.

    you may not purchase custom parts.
    These seem in conflict. Technically they aren't but in spirit they are.
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  7. #6  
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    Just an idea... If the wheels were driven off of a flywheel some how and the flywheel were fed power as needed to maintain max rpm, energy not being used while decelerating in the turns could be stored for quick launch in straights.

    The flywheel, if mounted under chassis, would give you a low center of gravity and also a gyro effect to reduce rollovers.
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