lipcsey

Nice design, thanks! Quite robust and massive but I'll need that torque anyway. The idea is to have 2RC modules on board, so a total of 4 RC buggy motors coupled, to propel my vehicle. I'm not anywhere close, still doing some trial and error, researching etc. In the beginning I wanted the gearbox to be shift-able using only 1 motor, so the auxiliary output of the rc module would have done the gear changes for me, but turns out there is no such design that's reliable as it also has to withstand a great deal of torque (coming from 4 RC motors). On the other hand I can't precisely set the driving ring to middle idle state with any motor (not even with mindstorms' servo) as the positioning is not accurate. Since I'm going for max speed, any slack gear change would result in cracking gears and the whole drive-train falling apart, so I need to get it right. So right now I'm planning to have the mindstoms brain on board attached to it 2 sensors to detect shift requests, and 3 servo outputs, 2 of which will do the shifting itself, and one other for the AWD/RWD lock (possibly used as a launch control feature too). Should be no issue as it's easy to program, provided that it will know by itself which gear is engaged. On top of all this I got to have the 2 RC modules + 4 engines built into the structure. I've done tons of tests on coupling the rc buggy motors, and turns out there is no point of not hard coupling them in my setup, they proved to be accurate enough, so going to be hard coupled. As the output of the 'engine' will be hooked up to a 2 way clutch, flicking up will transmit the power to the gearbox and the wheels, flicking down will activate the break system on a different axle (leaving the vehicle go by its inertia) at the same time. Only thing's missing is the reverse, that's why I was looking for a 3+r rather than 4speed, BUT your design is more than helpful, I'll find a way to build it in to fit my needs. Thanks again!

Driving rings go on top or? @Lemon: I'll give the differential idea a go and see how it turns out. I think I got the idea, I'll get back if there's anything. Thanks.

Hi, Do you guys know of any existing 3+R designs that feature a different driving ring setup where you'd need both driving rings be engaged for a gear to be selected? Normally you only engage one (otherwise gears would mesh against each other), but I'm looking for a design where you deliberately engage 2 at a time. In here you see both rings flicked up, i.e: - this could give you 1st. - Left down right up could get you 2nd - both down would be 3rd- - left up right down Reverse In fact I'm not exactly convinced such design is possible at all, but haven't had the time to thoroughly inspect up close. Cheers!

I'm not exactly sure as to how much it was used, bought it off of ebay, grabbed a bargain, a used supersonic RC in a good condition, according to the description and judging from the parts it shouldn't have been used too much, + there are no signs of serious wearings. Well, who knows, I was probably unlucky, I tried taking the remote control apart, but one screw is stuck so hard it was impossible to remove.

I don't think it'd be helpful to anyone anymore, but I thought I'd share, just in case: I still don't know whats wrong with the remote control, but I got my brand new one shipped today, aaaaaaand, it's working as a charm, both modules respond properly, with all 4 rc buggy engines, producing a staggering amount of lego-scale torque :P So, that's about it.

Yeah, suspected that as well, but made sure it's charged, so that's not it :S Why I think it's not the car battery is, I have 2 rc units, and none of them responds (both have their batteries charged)

No, not really, only used it indoors, for a few test spins, worked just well, it was sitting on the shelf the entire time then. There is something else I noticed but not sure if it was just coincidence or not, it seem to have picked up random signals when I was putting the 9v battery in the controller, but I was having a conversation on phone at the same time, without phone it never happened again.

The one in RC cars, so basically the remote controller of eg.: supersonic rc / rc race buggy

Hello there, I'm wondering, has anyone experienced problems with the RC module's remote controller itself? I got mine (used one) not so long ago, worked well on the very first day, now after about 1-1.5 week it just doesn't work. - Channels are the same on the rc module and the remote controller - I got 2 rc modules to test with, neither works, so I'm assuming it can only be the remote controller that's faulty. (but used to work the first time) - The 9v battery is about 2weeks old, and it's charged - The 6 1.5v batteries in the unit are charged as well. - Got a couple replacement aerials, but they should be fine. From close range it would work without them anyway. No idea what could be wrong, tried replacing the batteries, but no change. Anyone knows if it has probable week points, that are likely to reveal themselves after a while? or something to look for to fix? Thanks in advance!