10 replies to this topic

[Slot-Racer]

Has anyone ever seen this before to ground one line to the chassis? What is the advantage of this if any? Never seen this before. It's a cobalt setup so it's not like a low amp setup either. The chassis is aluminum but I was never under the impression that aluminum would be a better conductor than copper? Aluminum falls below that in conduction, but the gauge is thicker on the chassis though maybe that make up for this? Wondering if this was a weight saving idea or an amperage solution? Interesting either way.

 

 

 

 

 

 

[mjsh]

Nice Don Barber paint!

[Slot-Racer]

Nice Don Barber paint!

 

Right? I do like that body, very well done. 

[Half Fast]

AFAIK it is for weight saving, especially during qualy. Most wingers don't use it now.

 

Cheers

[Slot-Racer]

I also just noticed how he's using the spring insulator, only on one side of the spring on the brush side? Usually put it on both contact sides of the spring.....right? Wouldn't any current feed via the long spring contact to the spring cup or is that not enough compared to the hardware which should be way lower resistance being copper compared to steel I presume?

[Phil Hackett]

Post #1:The massive amount of aluminum compared to the leadwire takes away the disadvantage of poorer conduction by the aluminum.

 

Post #5: The current wouldn't be running up the long leg of the spring to the spring cup. All the power is going to the brush. There's almost no potential between the spring cup and the solder lug. I always insulated both legs of springs. Weird things happen in racing and having a spring melt because of a small piece of metal shorting the spring is possible... I've seen it happen.

[Slot-Racer]

Post #1:The massive amount of aluminum compared to the leadwire takes away the disadvantage of poorer conduction by the aluminum.

 

Post #5: The current wouldn't be running up the long leg of the spring to the spring cup. All the power is going to the brush. There's almost no potential between the spring cup and the solder lug. I always insulated both legs of springs. Weird things happen in racing and having a spring melt because of a small piece of metal shorting the spring is possible... I've seen it happen.

 

That was my thought about using the chassis as a conductor. Also to insulate both sides of the springs make more sense. 

[Gene/ZR1]

Here's an old post of mine, about the same subject with a vintage car

 

http://slotblog.net/...-is-this-about/

[Slot-Racer]

Here's an old post of mine, about the same subject with a vintage car

 

http://slotblog.net/...-is-this-about/

 

Thanks for that info. I guess vintage is the key word. Thanks for sharing! Neat.

[philk]

I remember seeing pics of some pro cars in the late ‘60s wired this way.

[axman]

Looks crude any clumsy... but little chance of getting the leads wires mixed up..