Outlaw car

[davet]

BSA block and BSA wheels. dual motors run direct to spur gears mounted on the backside of the left side wheels. Solid axles through block and wheels threaded on to shafts and epoxied.

Blue ON/OFF switch visible on this side between wheels, microswitch in front send power to microswitch on bottom of car. When the pin drops the power goes to both motors and we have 4WD then raised center rail at end of track will depress the switch on bottom to shut it down.

It works well on the table and really screams. Motors are 6v-9v variable and this batt puts out 11v on full charge.

 

[Guest]

Holy Smokes!! You are an animal

I'm diggin the live axles, that puppy is gonna hook up and move especially with the O-ring traction. Good job! Are you into RC cars by any chance?

 

[GravityX]

Wow!

 

[davet]

Thanks. I used to race RC cars back in the 80's.

 

[Chief]

Wow Man!! Would love to see a video of that car/thing. haha!

 

[DEW36]

That is cool!!!

 

[bracketracer]

Wow Man!! Would love to see a video of that car/thing. haha!

+1!!

 

[Guest]

Fully off the hook.

 

[sondo007]

OK, you get the MAD SCIENTIST AWARD!! That is just wild dude.

 

[4wheeldrift]

Me thinks you'll need chutes to pop out when it hits finish line.

We can't even keep our regular cars from flying off the track, can't imagine the damage your machine will do. =O

 

[MOFAST]

Cool Dave! What's cost to make something like that. Might be a cool Webelos project, my son is very interested in that type of thing.

 

[davet]

Ran the Outlaw car on some plastic test track here at home and it's a streak of lightning. Not sure if I should run it on the expensive aluminum track. I'll have to be at the end to catch it. No way the power cut off will stop it by itself.

It slowed down after a few runs but voltage still was at 10.3 own from 11.3. I hope the motors aren't damaged.

 

[davet]

I might cut her down to 6v. I'll maybe pull pinion off of one of the motors. That way that axle will freewheel and I'll use less of the battery. I picture it flying off end of track and spinning in all directions before bouncing off chairs, feet, babies, video camera bags. I wonder if I should get an Umbrella Policy.

 

[davet]

Outlaw car was unreal. I got a vid of it but it only shows it launching then me catching it at the end. My buddy couldn't follow it.

An hr before race check-in I took the 9.6v batt off charge and soldered the leads back on only to short out the batt. Found a 6v here and put that in instead. Took out the front motor and ran her in 2WD.

I had to catch it at the end because there was no way it could stop even with the cutoff switch on the bottom. It came at me so fast it almost caught me off guard even though I watched the pin drop.
My 7 yo daughter painted the top canopy for me. Still looks a little scary.

Above is the empty front motor compartment. Motor pinion and spur gear were meshed correctly by adding duct tape to the bottom of the motor until the teeth matched perfectly. Rear was done the same way.

Microswitch on bottom to cut off power. Center hole between wheels is there so I can grab the threaded axle shaft with a needlenose while I screwed the wheels on. Small holes on either side of that are so I could glue the plastic bushings into the block for the axles to pass through. White 1/2 circle mounte inside the spur gear is to keep the gear from grabbing the center rail and driving over it. The front one came off after the first run.

Motor pinion mated to spur gear. Wheels grooved down center for the O-ring to sit straight then a bead of glue around outside edge of O-ring.

-Ground wire from "-" of Batt to negative terminals of both motors.
-Hot wire from Batt to blue toggle switch for main power cut off.
-Hot wire from toggle to front microswitch.
-Hot wire from front microswitch to bottom microswitch.
-Hot from bottom microswitch wired to both "+" from motors.

 

[davet]

Cool Dave! What's cost to make something like that. Might be a cool Webelos project, my son is very interested in that type of thing.

2 Motors: $1.99 each
2 microswitches at $1.49 each
1 Toggle switch at $2.99
2 RC truck threaded tie rods at $3.99/pr
4 Plastic bushings for the axles to pass through at .20 cents each
2 spur gears at $2.99 each
2 pinion gears at $2.99 each
8 fiber washers at .60 cents each. These washers layed into the backside of the wheels to space the spur gear out. The washers were epoxied into the wheels then the spur gear epoxied to the washers. Center hole of spur gear fit nicely over end of inner hub of wheel to keep it centered.
1-- 6 volt battery from a New Bright RC car. A battery holder that holds 4-- 1.5 volt AA batts will work and has the wires already attached. Those wires would maybe have to switched to heavier ones due to the motor draw.

I found out that 4WD is cool but one motor with 2WD is all you need and it uses less battery life so you can make many runs. You can save money also because you obviously need less motors and gears.
Motors and switches were from ABC Electrics near where I work. It a surplus electronics shop with diodes, resistors, motors and a whole bunch of stuff I don't know how to use. They also have the AA batt holder for about .99 cents.