RC car brake discs
Discussion
I have noticed that some bigger RC cars come with brake disc systems - some quite advanced ones really.
I have been looking for a while for some tiny disc brakes to fulfil a project of mine of making braked rollerblades (no, I dont consider a bit of plastic block to be a brake). How much are the RC disc systems, how are they actualed and what do they cost? Are they metal or plastic discs? And given that my bike disc brakes are way overpowered for the mass they have to stop, would RC scale discs stop 80kg of human unintentionally accelerating down a hill?
I have been looking for a while for some tiny disc brakes to fulfil a project of mine of making braked rollerblades (no, I dont consider a bit of plastic block to be a brake). How much are the RC disc systems, how are they actualed and what do they cost? Are they metal or plastic discs? And given that my bike disc brakes are way overpowered for the mass they have to stop, would RC scale discs stop 80kg of human unintentionally accelerating down a hill?
IIRC the brake discs on the cheap version of my 1/5th scale FG racing lorry are made by a company who make them for wheelchairs and pushbikes, mag something, i'll have to check, the ones on my racing car and my expensive truck are custom made though and cost something mental like £500 for a set.
As for stopping a human, they stop a 30kg truck from 80mph pretty sharp so i suspect they would do ok.
As for stopping a human, they stop a 30kg truck from 80mph pretty sharp so i suspect they would do ok.
As well as the "toppling forward when braking" problem, you'll also need a power source to operate the servo, and a proportional electronic controller to replace the radio system - a servo tester should do the job.
If I was considering something like this, I'd fit an electric motor to drive the wheels, and use that for braking (drive the motor in reverse).
If I was considering something like this, I'd fit an electric motor to drive the wheels, and use that for braking (drive the motor in reverse).
Thanks for the replies guys.
Would it not be possible to simply replace the servo with a small bike brake lever assembly or something? I cant see why I cant just replace the electronic actuation aspect with a mechanical alternative?
As for the C ofg G aspect... I plan to put the brakes on an additional front wheel sticking forwards, so helping the falling forwards problem of balance. I may well extend backwards as well, having had a few alarming "cartoon blur of legs" moments to try and remain upright!
Would it not be possible to simply replace the servo with a small bike brake lever assembly or something? I cant see why I cant just replace the electronic actuation aspect with a mechanical alternative?
As for the C ofg G aspect... I plan to put the brakes on an additional front wheel sticking forwards, so helping the falling forwards problem of balance. I may well extend backwards as well, having had a few alarming "cartoon blur of legs" moments to try and remain upright!
As far as I'm aware they are just scaled down versions of the type you find on real cars. You could change the actuator from being servo controlled to something with a handheld mecanism without too many issues I would think. You will just need a long piece of pipe, you could even have one in each hand to vary the breaking to each foot.
SlipStream77 said:
Taking into account the height of the CofG of a human, I doubt you are going to want powerful brakes on rollerblades.
This.Having experienced a rock jamming the wheels on my 'blades when I was much younger, it's really not a good idea. For a start you'll have to work out a way of making both boots brake with the same force at the same time.
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