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When Dynamic ruled the world


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#1 chrisguyw

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Posted 12 November 2012 - 02:21 PM

In the mid-'60s Dynamic was the answer to my prayers... they made motor mounts to fit virtually any motor that was used for slot racing...this was a huge benefit to me, because as a youngster, I was intimidated (read as not skilled enough) by the thought of building a complete chassis from scratch.

These "hybrids" (Dynamic mount/brass pan) of which literally thousands were constructed, did rule the roost for a while, a very short while, as the fully-scratchbulit chassis quickly emerged as the kings... although the competitive lifespan of these hybrid chassis was extended in the 1/32 club scene...

The attached pictures are of a replica of a "hybrid" I built in the '60s... I remember it going well then, and the new one goes even better!!

It is powered by a motor courtesy of Mr. Havlicek... Arcos/shim, endbell harware, and a conservative 60t x 29 wind.

Excuse the non-period leads/guide... (they have been replaced)... I was in a rush for the track test... and a very enjoyable track test it was!!

It will be covered up by a repro Lola GT body obtained from Electric Dreams a while back.

Cheers,

Chris Walker

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Chris Walker




#2 Pablo

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Posted 12 November 2012 - 04:16 PM

Love it !!! :D
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#3 Duffy

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Posted 12 November 2012 - 06:46 PM

Great thread title too!
Michael J. Heinrich
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#4 Peter Horvath

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Posted 12 November 2012 - 08:23 PM

That's great.
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#5 Champion 507

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Posted 12 November 2012 - 09:19 PM

Dynamic sure ruled where I raced in 1965/66. We changed brands of motors, tires and bodies but everything was all connected to a Dynamic frame. Most all my Dynamic stuff is gone. Sure wish I had kept some of it. :cray:
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#6 Pablo

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Posted 12 November 2012 - 09:27 PM

Doug, the Dynamic parts are still available, we just need to pay for them again :laugh2:
Paul Wolcott

#7 Champion 507

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Posted 13 November 2012 - 01:43 AM

PABLO SAID:
"we just need to pay for them again" :laugh2:

....and again and again and again. I do have all the parts to build the Bounty Hunter from the Car Model magazine article from 1967 that uses the Dyna-flex motor carrier for an FT-16D and...get this...a CHAMPION 507! Just no time to build it yet. Argh!
Doug Azary
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#8 tazman

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Posted 13 November 2012 - 04:31 AM

I too have been of that 60's generation that thought the dynamic chassis cars were the BEST! My dad & I built countless cars using these wonderful chassis and buying the latest upgrades like a hinge and/or rear axle BB. To make it even more competitive, we discovered Champion motors especially w/BB which were quickly inserted and boy were there ever a difference, in fact a BIG one! It was the BOMB ---- unfortunately like many other parts of the country during the late 60's our tracks closed and my cars sat and eventually disappeared! Today w/the help of Ebay and guys like Bling of BPR I have been fortunate enough to live my past again! I've built and partially restored 2 cars --- an inline 36D VW Bug ala DuBro body and hinged Dynamic chassis and 36D sidewinder w/1/16 wire suspension and silicone rear tires (way KOOL)! I have other dynamic projects waiting to be restored but finding the time is another story. Long live DYNAMIC cars and parts!
Aloha,
Rick

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Rick Ortogero

#9 Champion 507

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Posted 13 November 2012 - 05:46 AM

Mitey cool, Rick :good:
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#10 havlicek

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Posted 13 November 2012 - 06:32 AM

That's one heckuva slick/clean car Chris! Then again, seeing some of your others, this doesn't surprise me at all. :)

-john
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#11 Don Weaver

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Posted 13 November 2012 - 09:02 AM

OK, Chris I give up! I have looked at these pictures until I'm almost blind....how are the brass pans attached to the chassis? It's probably something so simple I'm going to be embarassed.

Don Weaver

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#12 Hworth08

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Posted 13 November 2012 - 09:33 AM

I agree with Don, what's holding the pans?! :)

The first track I raced on in 1965 was full of Dynamic based cars. Often kits that got converted to a Dynamic chassis.

The race winners were usually a Pittman 190 something powered scratchbuilt or a 36D powered Dynamic with a Gran Prix or Sportsman/Super Modified body.

So simple, so fun.
Don Hollingsworth

#13 chrisguyw

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Posted 13 November 2012 - 11:06 AM

Hi Gents, Thanks for your kind words...........before showing you how the pans are attached, I would like to tell you about one of my proudest slot moments........I built the original car in the 60's as a 14/15 year old kid, and when I took it to the track, a few of the older guys (fast guys) though it was pretty cool, and a few adopted this set up for their own cars......one of the cars to beat that year had this set up.................a 14 year old was never happier/more proud.

Anyway enough of the sentimentality....on with the answer to your question.

The first picture shows the pan assembly is a single unit.........the vertical brass channels contain free floating 1/16 piano wire secured only at the ends by stoppers.......this permits independant vertical pan movement. I also had to slip short pieces of brass tubing over the piano wire, and in between the vertical channels for the proper ammount of downstop. I also had to solder a small piece of brass strip onto the rear brass tubing, again to control the downstop position (the flat of the brass strip will rest on the guide tongue).

Notice that in this picture the piano wire crossmembers are resting on the bottom of the vertical channels.



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In the following picture the pan assembly is just sitting on the chassis with the crossmembers acting as downstops......notice the piano wire crossmembers are now resting on the tops of the brass channels. It takes a bit of fiddling to get the right combination of wire/channel/tubing sizes to get the downstop position correct.

As well the fore/aft positioning of the vertical channels is important as I have positioned these to allow for a small ammount of fore/aft movement, between the Dynamic motor mount/front axle holder.

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In the last picture the Dynamic "T" piece now sits on top of the guide tongue....and with 2 screws, holds the pan assembly to the chassis!!.....it is secured just ahead of the rear vertical channel to allow a snick of fore/aft travel, and the bottom of the side tabs of the "T" were ground to permit both smooth fore/aft movement, and vertical pan movement.

I don't remember ever having a breakage, or seeing a breakage on any of the "big guys" cars...........................



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Cheers
Chris Walker
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Chris Walker

#14 tazman

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Posted 13 November 2012 - 11:40 AM

I always wondered how people made their pans and your example is PRIMO and very informative!
Aloha,
Rick
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#15 don.siegel

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Posted 13 November 2012 - 04:00 PM

Beautiful job Chris and I love that story - impressive at that age too!

This reminded me that Team Dynamic had to use their own chassis for awhile in the SoCal race series (Rod & Custom, then Car Model, then....), and I remembered that they didn't miss by too much making a couple of these races. Here's a "pro" Dynamic based chassis from the 1st Car Model Race, in the June 67 issue of Car Model.

Don

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#16 Mark H

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Posted 13 November 2012 - 07:18 PM

that pan mounting is genius. so simple i would never think of it.

heres a hack job pan on my dynamic car that someone did back in the day.
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#17 Don Weaver

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Posted 13 November 2012 - 08:06 PM

Chris,

I knew it would be something so obvious I would be embarassed :crazy:! Very clever......

Don Weaver

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How do you spell "leverage"?

........R-A-N-S-O-M


#18 Glenn Waldmann

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Posted 09 January 2013 - 09:55 PM

Beautiful work.

 

My first attempt at scratchbuilding was a Dynamic hybrid, too.

 

Getting back in after a short hiatus (!), I was planning to do it again before bending some brass rod.

 

One question, if I may: how did you get the magnesium casting to look so fabulous?

 

Dynamics always looked a little rough; the used ones on ebay today are even rougher.

 

Yours positively glows.

 

Best wishes.

 

Glenn



#19 macman

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Posted 09 January 2013 - 10:54 PM

I think Dynamics are aluminum, not magnesium...


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#20 Don Weaver

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Posted 10 January 2013 - 09:01 AM

Aluminum bends, magnesium breaks. It's magnesium.....

Don Weaver
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Don Weaver
The supply of government exceeds demand.
L.H. Lapham
 
If the brain-eating amoeba invades Washington
it will starve to death...

 

How do you spell "leverage"?

........R-A-N-S-O-M


#21 don.siegel

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Posted 10 January 2013 - 09:35 AM

Supposedly an aluminum alloy, with very small amounts of magnesium, and not always the same composition... it doesn't oxidize like the Cox chassis, which are definitely magnesium...

 

There was a lot of info on these in Greg Holland's VSRN newsletter - he was fascinated by Dynamic and dug up a lot of info on them...

 

Don



#22 Horsepower

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Posted 08 September 2016 - 07:16 PM

Yup, cast aluminum. That is, if it isn't a counterfeit.


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#23 hiline2

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Posted 10 September 2016 - 04:48 PM

Speaking of Dynamics !  A re-build of a car I had back in mid 60s !  Brought to you by Gator-Tex Race team!

 

 

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#24 Detroit Dave

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Posted 12 September 2016 - 01:40 PM

Excellent!  I'd love to see that paint job in person.  Does the silver change the green in the back like a candy paint job does? 


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#25 hiline2

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Posted 27 October 2016 - 07:54 PM

Ill have to ask Bob on the paint, but here is another Dynamic build we teamed on...

 

 

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Paul Bass

#26 SlotStox#53

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Posted 27 October 2016 - 10:55 PM

Now that's a seriously cool Chappy :D

#27 Superbird

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Posted 27 December 2016 - 02:44 PM

Yes, Dynamic was amazing in the variety of combinations you could achieve. I have a small collection myself. Some are very light and quick! Some have pans like the Chris Walker's example. They all have an "Achilles heel": They are 'stiff'. The lack of a drop arm couples the front axle to the slot guide so any turn-in roll-under will lift the slot flag and you depart the groove.

 

I could never understand these chassis back in the day since most of them had a hinge across the middle. I had never seen a chassis like that until later life when I saw Gene Husting's ground breaking angle-winder. Maybe there was a connection between the designs?  


Pete Shreeves





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