elfergos

OK, I installed the ESC and ran in to some problems with the motor stuttering, a search around told me it could be a battery problem and it seemed to behave when I switched in my old battery (which I had thought to be dead but trickle charged a few days ago to check), only lasted for about 5 minutes before it started stuttering again but the battery is over 20 years old, chances are it won't hold a charge for much longer than that. There are some idiosyncrasies I could do with clearing up; according to the instructions, upon installing the ESC it automatically calibrates, this is evident by an LED on the unit flashing, which it does, but it always flashes, I have left it for a few minutes and it never stops which makes it sound like it hasn't calibrated, the speed control on it is excellent though especially at lower speeds which was the problem with the old mechanical arm one I had, I did also try tweaking the trim so it was right in the centre of when it isn't making a noise but no change. The other thing is the sound, at first I thought it was fro the ESC but on closer inspection it is actually the motor which makes a high pitched buzz which sounds almost like an electrical alarm, is this normal? It happens on both my old (stock) 380 silver can and my new traxxas titan 380, its only at lower speeds though. On the operation side of things it doesn't seem to push straight in to reverse and is a bit slow in this regard, I heard that for some units this is a deliberate thing whereby a reverse motion after accelerating breaks and resets to neutral and a second reverse motion kicks in to reverse, is this what is happening on this ESC? Other than those points I'm happy with it, very neat little unit, operates very smoothly and has a tiny footprint in the car.

I was planning on changing the stock motor to a traxxas titan. Its still a 380 but I was wondering about the pinion I need. The stock motor has a fixed pinion so I'll need a new one. The stock is a 10 tooth cog, do I need the 10-12T pinion?

Thanks, I'm a complete noob when it comes to building RC cars, does this replace the stock servo, arm and slider contact? Or to put it another way is the ESC a type of servo or a servo replacement?

Yeah I'm still using the stock servo, arm and slider contact, it still works as far as I remember like it did 20 years ago but there isn't much in the way of speed control, its virtually either just on or off, sort of digital rather than analogue. Would something like this fit with what I need: http://www.modelsport.co.uk/etronix-probe-plus-brushed-esc/rc-car-products/367600 ? Are they difficult to install?

I just refurbished my old Grasshopper but was wondering about speed control, there doesn't seem to be a great deal of variable resistance between when the motor is not running and it being full speed. Are there better resistors or is this a property of brushless motors?

Is there a set standard for parts with RC cars? For instance, if you had a Tamiya buggy, would tyres, motors, servos, receivers etc from other manufacturers fit and how can you tell compatibility, is it just by scale and class?

Part 9805755 looks wrong, the threads are by the head as opposed to the tip, however part 9805729 looks about right (described as 21mm tapping screw)

Thanks for the help. BTW is there a better way of fixing the receiver to the chassis? I have noticed a double sided tape is available, it seems curious that this component isn't attached with screws like all the other pieces.

I was having a clean out recently and came across my old RC car. It had stopped working at some point during the mid 90's, not sure why but, the motor did constantly keep breaking free of its wires requiring constant re-soldering (a problem when you didn't own a soldering iron!) but amazingly the wires seem to have been attached. Aside from the odd piece of rust, battery acid damage and broken antenna on the remote control and the rubber band holding the receiver completely disintegrating it doesn't look too bad and I was curious to see if I could get it back up and running. I am probably going to need a new battery, and the charger disappeared at some point in the annals of history, the suspension is pretty rusted but I am missing the following screws: Screw 1: Screw 2: Position on Axle: I found the following screws on modelsports.co.uk: http://www.modelsport.co.uk/tamiya-3x14mm-step-tapping-screw-5-/rc-car-products/13279 These are listed as 14mm tapping screws, there is also a 21mm tapping screw available from the same place but there is no picture. Are these the screws I am looking for?