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An odd one


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#1 Mark Mattei

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Posted 22 June 2017 - 10:10 PM

eBay purchase sometime in the last decade, failed to get car's history at time of purchase.

Anyone have any knowledge of builder? Car was in some distress when acquired, just put it back together last week.

Thanks,

Mark

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#2 Racer36

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Posted 23 June 2017 - 06:45 AM

Very interesting piece.


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#3 jimht

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Posted 23 June 2017 - 09:43 AM

"Distress": "Help me, I have a gear fetish."

 

"Interesting": "Rube Goldberg has illegitimate progeny".


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#4 The Number of

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Posted 23 June 2017 - 09:49 AM

My guess a frustrated swiss watchmaker. :)
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#5 Tex

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Posted 23 June 2017 - 10:06 AM

Well, it's "different"! LOL. 

Looks like he was trying to get a specific weight balance (obviously didn't want to use lead) and was trying to achieve ground effects with that brass "tunnel" mid-point to the rear.

 

Just a slot car guy having fun.


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#6 Dallas Racer

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Posted 23 June 2017 - 11:39 AM

Or maybe he placed the motor forward to make room for the ground effects.

 

In any event, that's very cool! The entire front of the chassis is milled. Maybe the gear mount as well. A lot of work in making that chassis.

 

The pans look like aluminum and they look to be assembled with solder. You can't solder aluminum, right?


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#7 Ramcatlarry

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Posted 23 June 2017 - 12:00 PM

Mid 1990s... Slick 7 front wheels and late era Mura motor and GTP (GT1) body with step tail changed. JK(?) 38t spur gears..

 

Plastic parts might be Plafit or Scholer class origins.


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#8 Dave Crevie

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Posted 23 June 2017 - 02:23 PM

Aaaaa... ???



#9 Mark Mattei

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Posted 23 June 2017 - 04:10 PM

Hi Dave,

 

Speechless? Or not worth comment? LOL.



#10 don.siegel

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Posted 24 June 2017 - 03:42 AM

Great find, Mark. 

 

Definitely a Rube Goldberg Mk II (or is that Mark II?)

 

Are those plastic things in front of the front wheels intended as skids? 

 

Even if you had asked, the creator probably wanted to remain anonymous... 

 

Don 



#11 mike1972chev

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Posted 24 June 2017 - 12:48 PM

That many gears has to be absorbing much HP/torque over a standard two-gear pinion/ring gear set-up.


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#12 Dave Crevie

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Posted 24 June 2017 - 02:02 PM

Speechless, Mark.

 

You come up with some really bizarre stuff. This has to rank at the top. I can't justify the gear train. I guess I would have mounted the motor in-line and run a shaft to the rear end.

 

But we did some goofy things back in the early '60s, too.



#13 NY Nick

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Posted 24 June 2017 - 02:18 PM

How does it run?


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#14 Mattb

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Posted 24 June 2017 - 02:24 PM

Engineering exercise by a college student in 1968.


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#15 Samiam

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Posted 24 June 2017 - 08:25 PM

I agree with Matt. A proof of concept project. Might have even been an engineering school project.

 

Most fascinating! (Spock).


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#16 Dave Crevie

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Posted 25 June 2017 - 02:32 PM

The type of gears put it much later than 1968.

 

Just someone trying to come up with an edge. If racers were afraid to try something new, we would all still be racing Monogram and Cox cars.



#17 MSwiss

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Posted 25 June 2017 - 02:55 PM

I think it might of meant' 86.

Nothing on that car is 6'0'\s.

Fun car. I doubt if it ran even average.

Just trying to figure if it has BBs or bushing stuck on the gears.

It wouldn't be very good to have those axles rotating in brass.


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#18 TSR

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Posted 25 June 2017 - 04:23 PM

Every element of this interesting folly of a car dates from at the very least, late in 1991, likely later: the body is unmistakably that of the 1991, Ross Brawn-designed Jaguar XJR14 sponsored by Silk Cut cigarettes. Looks like the original body, so end of the discussion right there as far as how old it really is.

jaguar_xjr14.jpg

The gears and the "C-can" motor with these vents date from the same period, and so do the wheels and gears. 

Of course it is an attempt at generating ground effects, and of course, with the Reynolds scale of air molecules size, it cannot and will never work regardless of how clever one can be. 

But it makes for an interesting conversation piece of how to make things a lot more complex than they need to be to drastically slow the speed of a given slot car. In fact if said slot car has any significant mechanical grip, it will strictly come from its own excessive weight, pushing hard on the rear tires.

 

I love this car, it is simply fantastic and tells everything about its creator.


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#19 Dallas Racer

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Posted 25 June 2017 - 08:08 PM

Philippe,

 

You've brought up the Reynolds scale problem before in discussions. It just dawned on me that the high scale speed of a slot car might make up for that.


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#20 TSR

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Posted 27 June 2017 - 06:26 PM

Phil,

 

Hardly I am afraid. Speed is speed, regardless of the size of the object, and air molecules are not scaled to 1/24, their size just to make us happy... :(

Trying to generate down force by creating low pressure under a 1/24 car is a total waste of energy, but a lot of fun just to try. :)

The only way to apply down force on a slot car of that size is to push on it as hard as possible.

 

There are only three ways to do that:

1/) Huge aero appendages (see "wing car") effectively making a shovel able to retain compressed air molecules, causing pressure.
2) A large amount of weight over the rear wheels, pushing tires down and increasing grip, at the cost of speed, strangling power from excessive weight.
3) Magnets, that also will slow the car from drag.

All three methods will offer some benefit depending on circumstances. Lightweight cars without either 1-2-3 will fly rather than keep on the pavement.



#21 Jairus

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Posted 27 June 2017 - 09:43 PM

I like it! B:)


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