Dual Motors...and it WORKS!!!

[Skunkworkz054]

Would the slim neo magnets (gold) be better than the stock ones? Stronger magnet= more drag... So maybe stock magnet in the turbo motor and gold neo magnets in the main motor? (assuming the gold ones should be the in between to the stock and standard neo's)

And food for thought... Two speed tranny?? Possible??

 

[DANALLY]

Would the slim neo magnets (gold) be better than the stock ones? Stronger magnet= more drag... So maybe stock magnet in the turbo motor and gold neo magnets in the main motor? (assuming the gold ones should be the in between to the stock and standard neo's)

And food for thought... Two speed tranny?? Possible??

So far the best combo on the stock size motors are the stock magnets in both motors. The fast motor heats up so fast anyways that with stronger mags in the slow motor it would be even worse.

There is a guy that did a 3 speed trany on one a long time ago. No one else has done one so I can't see it being an easy option. I have never even seen a trany this small that had multiple speeds.

I will be working on a plate for dual big blocks. Haven't started yet so no idea if the second motor will fit yet.

The weather has been so bad here...hot as hell and recent storms that have made it unnaturally humid for Az. I haven't ventured into the garage in days.

 

[Skunkworkz054]

I know how bad AZ, can get... I've had to do some training out in Yuma several times... I despise that place lol Nothing like living in tents out in the desert for a month and a half and no A/C when its 120+!!!

Got chased by this guy too

Anyways back to the subject at hand lol
I know its possible, probably a little difficult, but it would be interesting if you come up with a wiring schematic where at low trigger input (from your radio) the slower motor was running then once you were close to full throttle a relay switched over to the faster motor. So it was all automatic and you didn't have to tie up another channel on your radio. Or stop and flip a switch..

In theory you could probably do it with a relay and figure out what the power output curve is and then wire it up so lets say the lower 75% the slower motor would be running then once the wattage hits the last 25% ( or close to full throttle) the relay kicks over to the faster motor now giving you an instant transition to more wheel speed...

Or... If i remember it right you could have the wiring set up so it all acts like filters.. I could be wrong, its been a while, but lets say your power curve goes 1-10 watts. Now your slower motor is wired up so it will only run from 1 watt all the way to 7 watts. Then the faster motor will only operate between the 7 and 10 watt mark... This way would probably be Alot more difficult and use a lot of tweaking getting that transition smooth and ensuring there isn't a dead spot there or a moment where both motors are on at the same time...

One of the down sides i could see happening to this is, as the battery dies the voltage drops thus dropping the wattage now making the curve like 1-8... And depending upon how its wired up, once the battery is low you could possibly not be able to hit that top 25% to run the faster motor...
So again, supplying a little more food for thought... Lol

 

[DANALLY]

I like your train of thought but I do see one problem...I like to fully utilise the main motor all they way to it's top speed first. My thoughts are: use as little force as necessary to keep your line. If the second motor came on at lets say 1/2 trigger, you would loose all of the inbetween speed and torque. A lot of times those speeds are the most useful. You would almost end up with slow......than fast.....and nothing to work with inbetween.

I really like the 3rd channel set-up. Yes the electronics are tough to fit but the benefits are amazing. It is also nice going with an aftermarket ESC that makes the power and control that much better. I need to work on finding super small ways to make the motors switch like a smaller switch and sub micro servo.

Thanks for the thoughts. I will be working on the Big Block plate soon.

 

[Skunkworkz054]

Hmmm... Well for the smaller servo I'd say the HS-35 HD ultra nano servo... Or the linear servos out of the elite micro planes.. (have to change the connector though)
Smaller Switches? Either take apart an old VCR and get those tiny switches that read when a tape is in there... Or old cassette player...(VCR!?!?! TAPE!?!?? CASSETTES!?!? What are those!?!?? Lol:as the younger crowds would say lol) Also you could look around on digikey.com...

What about for the 3rd channel instead of running a servo ( if your 3rd channel was a switch or push button) you use the power from that and wire it straight to a relay and that would switch between motors... Saving on space and weight... WIN!!!

 

[DANALLY]

Could work but finding the right relay that will hold up to the amp draw and still be small might be hard. Also, will a relay coil run off of the signal wire from the receiver? It's not like they are a complete circuit with a hot and ground to trigger the coil. It's more like a signal wire to change directions but the power is on the servo all the time through the circuit. Please correct me if there is a way.

It is just so easy to do the micro switch from Radio Shack and it glues nicely to a servo.

I ran a sub micro servo and in a few runs it was already wearing out. It didn't like the 7.4volts. I could add in a regulator but again...where am I going to come up with more space! I hate rat's nest wiring and with all this stuff it is so hard to keep it clean.

I like running the servo on the rear axle as it adds weight in the right place and it is so easy to mount there. I just really need to spend more time on my chassis and get this stuff in there. If I had better access to relays I might try some.