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Need ID for aluminum chassis and funky slimline chassis

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#1 Ted Bier

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Posted 28 December 2016 - 03:31 PM

Hi all!


Been looking around in my box of stuff from the closet! Found these two chassis.


The aluminum one is 1/24 adjustable and on all four corners those axle houses are rotate!!


The other I think is also 1/24, slimline and funky! Look at that magnet in the back, and oh ya.... it runs!!


Anybody know what they are?











#2 Cheater


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Posted 28 December 2016 - 03:52 PM


The upper chassis is a common Dynamic chassis, in the version they termed Dynaflex. What you call rotating axle housings are actually attached to the main chassis part via springs. The idea was to provide a form of suspension but in all honesty, it was a terrible design and worked poorly. These Dynaflex chassis worked a lot better if they were epoxied solid like the earlier Dynamic chassis.

Here's a couple pics of a Dynaflex chassis design, including one that has a hinge between the rear motor carrier and the guide tongue and front axle assembly.




Dynamic Models was a very prolific manufacturer of slot car chassis parts and cars in the '60s. To get an idea of the vast variety of stuff they produced, click HERE to see a series of posts made here by Sweden's Bertil Berggeren in 2010.


The slimline "chassis" is actually just a motor with a built-in rear axle carrier. Never knew much about these, as they were already obsolete when I got involved in the hobby; there were several companies than made motors like this. One of the other sharp slot car historians here will have to ID it for you.

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#3 Dave Crevie

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Posted 28 December 2016 - 04:33 PM

The motor is an Altlas from the early/mid '60s. I used these quite a bit since the Pittman motors of similar design were mostly five pole, and had a lower RPM.


The brush system on the Atlas motors was the weak point. The coil springs could go limp if the power arched through them, so keeping the brush holders clean inside was critical.


By the time Pittman started supplying their motor with three pole arms, can motors had taken over.

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#4 don.siegel


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Posted 29 December 2016 - 07:05 AM

A couple quick corrections on the motor: that's the Atlas AT406, designed for 1/24 scale cars, and has ball bearings. From the mid-'60s, in 1965 or '66, when Atlas released their two sports cars, Lola T70 and Ferrari P2, with these motors. The smaller version of this motor, the AT206 or 208, was used on their 1/32 cars and their 1/24 F1 cars - and is still very popular in vintage races! 
In fact, Pittman already released a three-pole arm motor in 1963, the original DC196, and that was the "hot" motor for a couple of years, and it was soon rewound or modified with a five-pole DC65X arm (hi, Rick!). 
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