Jump to content




Photo

White Circle silicone tires


  • Please log in to reply
18 replies to this topic

#1 Maximo

Maximo

    Checkered Flag in Hand

  • Full Member
  • PipPipPipPipPipPip
  • 1,592 posts
  • Joined: 31-August 06
  • Gender:Male
  • Location:New Braunfels, TX

Posted 10 September 2019 - 06:44 PM

Slot Car World,

 

Since I am a current user and believer in the use of silicone-coated foam tires and also I am a Thingie Slot Car user/builder/collector, I would like any information and recollection of these Detroit products made by White Circle Raceways.

 

Any stories as well as photos of these white wonders are welcomed here!

 

If/are there any NOS White Circle silicone tires available, please let me know!

 

They were also referred as "Window Walkers"!

 

Maximo

 

Detroit 200.jpg


  • Jencar17 and philk like this
David Ray Siller
Retired Video Game Creator/Designer/Producer
Thingies are my thingie!




#2 DocSlotCar

DocSlotCar

    Mid-Pack Racer

  • Full Member
  • PipPipPip
  • 158 posts
  • Joined: 13-July 09
  • Gender:Male
  • Location:Northeast

Posted 10 September 2019 - 08:05 PM

Mid-America has some white or tan-colored 3/32" axle foams. Anyone help him silicone those foams for him?  


Chris DaBoer

"Stop whining, Slot Car racing is only big boys racing toys"

#3 bradblohm

bradblohm

    On The Lead Lap

  • Full Member
  • PipPipPipPip
  • 294 posts
  • Joined: 22-November 06
  • Gender:Male
  • Location:Westland, MI, USA

Posted 11 September 2019 - 08:02 AM

I've got White Circles specially done for Jerry Mrlik in green, orange, and silver!  No idea where they got that silicone back then!

 

I found, printed, and saved the patent years ago as I wanted to know how they made them.  Google is great, when you ask the right question!

 

https://patents.goog...atent/US3408770

 

Brad


  • Maximo likes this

Brad Blohm


#4 MattD

MattD

    Posting Leader

  • Subscriber
  • PipPipPipPipPipPipPip
  • 2,090 posts
  • Joined: 13-August 11
  • Gender:Male
  • Location:IN

Posted 11 September 2019 - 09:18 AM

The tires I recently got from Mike were Dow black silicone caulk.  There is a picture of the Dow in the thread.    If it cures thoroughly as a solid tire, it should easily cure as a foam tire coating.   dow probably makes this compound in white.


  • Maximo likes this
Matt Bishop

Vintage Cox Slot Cars

#5 don.siegel

don.siegel

    Posting Leader

  • Subscriber
  • PipPipPipPipPipPipPip
  • 4,337 posts
  • Joined: 17-February 06
  • Gender:Male
  • Location:Paris, France

Posted 11 September 2019 - 12:18 PM

Fascinating stuff Brad, thanks! 

 

Didn't know about the first diluted coating, that penetrates into the sponge... but of course! 

 

Don 



#6 bradblohm

bradblohm

    On The Lead Lap

  • Full Member
  • PipPipPipPip
  • 294 posts
  • Joined: 22-November 06
  • Gender:Male
  • Location:Westland, MI, USA

Posted 11 September 2019 - 12:52 PM

Can't remember if it was in this patent or another source, but it spoke of heating the foam to open the cells for better silicone penetration, then after cooling it improved "mechanical" grip between foam and silicone.

 

Just GIVING away the secrets!


  • Maximo likes this

Brad Blohm


#7 don.siegel

don.siegel

    Posting Leader

  • Subscriber
  • PipPipPipPipPipPipPip
  • 4,337 posts
  • Joined: 17-February 06
  • Gender:Male
  • Location:Paris, France

Posted 11 September 2019 - 02:04 PM

Here it just talks about diluting the silicone: 

 

The coating is applied to the base sponge tire by diluting one part of Silastic with one part of naptha or heptane and applying it to the sponge tire with a brush. The coating is allowed to be absorbed into the sponge for approximately five minutes. Following this, a full strength or undiluted coat of Silastic is applied by brush to the tire and allowed to set for two to three hours. When this coating has set, a final undiluted coat is applied and allowed to set.

(...)

This coating when cured forms a tough rubbery film which adheres tenaciously to the sponge due to the interlock established between the coating and the individual cavities or cells of the sponge. The small cell size improves the strength of the coating bond.

 
Don 

  • Maximo likes this

#8 jimht

jimht

    Checkered Flag in Hand

  • Subscriber
  • PipPipPipPipPipPip
  • 1,322 posts
  • Joined: 16-February 06
  • Gender:Male
  • Location:The Alamo City

Posted 11 September 2019 - 04:09 PM

I had better results using Bestine (heptane) rather than naptha as a thinner for Permatex flowable silicone.


  • Maximo likes this

Jim Honeycutt

 

"I don't think I'm ever more 'aware' than I am right after I hit my thumb with a hammer." - Jack Handey [Deep Thoughts]


#9 MattD

MattD

    Posting Leader

  • Subscriber
  • PipPipPipPipPipPipPip
  • 2,090 posts
  • Joined: 13-August 11
  • Gender:Male
  • Location:IN

Posted 11 September 2019 - 09:12 PM

Jim, I had thought of using MEK to think the Permatex silicone.  Instead of just coating a foam tire actually  trying to get it thin enough so the tire would absorb it

 

What is "heptane"?


  • Maximo likes this
Matt Bishop

Vintage Cox Slot Cars

#10 bradblohm

bradblohm

    On The Lead Lap

  • Full Member
  • PipPipPipPip
  • 294 posts
  • Joined: 22-November 06
  • Gender:Male
  • Location:Westland, MI, USA

Posted 11 September 2019 - 10:57 PM

Bestine (heptane) is available everywhere, and I'm gonna get some!  Learn something new every day!


  • Maximo likes this

Brad Blohm


#11 MattD

MattD

    Posting Leader

  • Subscriber
  • PipPipPipPipPipPipPip
  • 2,090 posts
  • Joined: 13-August 11
  • Gender:Male
  • Location:IN

Posted 12 September 2019 - 09:03 AM

But what is it?   Is it a paint thinner of some type?    I will check my local ACE when I am there today.     Lot of experimenting ahead!


  • Maximo likes this
Matt Bishop

Vintage Cox Slot Cars

#12 bradblohm

bradblohm

    On The Lead Lap

  • Full Member
  • PipPipPipPip
  • 294 posts
  • Joined: 22-November 06
  • Gender:Male
  • Location:Westland, MI, USA

Posted 12 September 2019 - 09:24 AM

Short-chain hydro-carbon of some kind.  Used as a thinner.  Talked about being used to remove old glue.  Curious if it's in "moo be gone" or any of those kinds of products.  Anyway, I've got some "moo" on cases I want gone, so I'm going to try it, and, I'll have some for fooling around with silicone coating foam tires.  Of course that'll be TWO days after hell freezes over 'cause I'm booked solid until then!


Brad Blohm


#13 MattD

MattD

    Posting Leader

  • Subscriber
  • PipPipPipPipPipPipPip
  • 2,090 posts
  • Joined: 13-August 11
  • Gender:Male
  • Location:IN

Posted 12 September 2019 - 01:24 PM

Goo Be Gone will take that adhesive off a plastic box.    It is a citrus based product I think.   There is a similar product called Goof Off that works just as good.     when you open it and smell that orange aroma, don't take a drink of it.


Matt Bishop

Vintage Cox Slot Cars

#14 Bob Appelle

Bob Appelle

    Mid-Pack Racer

  • Subscriber
  • PipPipPip
  • 189 posts
  • Joined: 07-December 09
  • Gender:Male
  • Location:Washington, MI

Posted 12 September 2019 - 08:48 PM

Bob rented his first space from Jim Ursu at the Shores Raceway on Harper and nine mile road in Saint Clair Shores Mi, I use to help out coating tires. The process Bob used was a two pieces of aluminum  1x36x 1/8 bolted together and mounted axels with 64 pitch welden spur gears that rotated very slow. Put the tires to be coated on the axels. You would pour the diluted silicon in a tray about 6"x12" by 1/2" deep and hold it under the tires as they rotated until they were coated. Let them rotate until the were set up. I can't remember how many in a batch, but I would thing at least 200. It was a very simple design, but it worked great. I feel the white was the best traction over the clear or black. I worked for Jim and Loraine at Shores. 


  • Maximo, NSwanberg, MattD and 1 other like this
Hemi Bob

#15 Bob Appelle

Bob Appelle

    Mid-Pack Racer

  • Subscriber
  • PipPipPip
  • 189 posts
  • Joined: 07-December 09
  • Gender:Male
  • Location:Washington, MI

Posted 12 September 2019 - 08:53 PM

Maximo, The window walker was a sales pitch, when someone wanted to purchase a pair, I would take them out of the package and put the tire against the vertical section of glass on the showcase and let it go. It would roll slowly all the way to the bottom of the glass. SOLD


  • Maximo and Dale Tomczyk like this
Hemi Bob

#16 Maximo

Maximo

    Checkered Flag in Hand

  • Full Member
  • PipPipPipPipPipPip
  • 1,592 posts
  • Joined: 31-August 06
  • Gender:Male
  • Location:New Braunfels, TX

Posted 12 September 2019 - 09:24 PM

Thank you so much Bob! You answered in the spirit of my intent, that is to learn about the product and company.

 

Of course everyone's sharing of the process and technique to making these special type of slot car tires is welcomed as well. 

 

Knowledge is everything!

 

 

Maximo


David Ray Siller
Retired Video Game Creator/Designer/Producer
Thingies are my thingie!

#17 don.siegel

don.siegel

    Posting Leader

  • Subscriber
  • PipPipPipPipPipPipPip
  • 4,337 posts
  • Joined: 17-February 06
  • Gender:Male
  • Location:Paris, France

Posted 13 September 2019 - 03:25 AM

Bob A - thanks much for giving us these historic details - that's a very funny image of 200 or so tires slowly rotating together... 

 

One question: do you remember where the original sponge tires and wheels came from? Was that a White Circle production, or did you buy them in from somewhere else? 

 

Don 



#18 Bob Appelle

Bob Appelle

    Mid-Pack Racer

  • Subscriber
  • PipPipPip
  • 189 posts
  • Joined: 07-December 09
  • Gender:Male
  • Location:Washington, MI

Posted 13 September 2019 - 04:04 PM

I use to B.S with the White Circle employee while he worked. He use to make the wheels  in the same shop as where they coated them. Just a lathe with a tool turret. He use to bang em out pretty fast. I don't remember the tire mounting and grinding process, but I think it was all done in house.


Hemi Bob

#19 Dale Tomczyk

Dale Tomczyk

    Rookie Keyboard Racer

  • Full Member
  • Pip
  • 5 posts
  • Joined: 15-November 18
  • Gender:Male
  • Location:Denver, CO

Posted 15 September 2019 - 10:31 AM

i remember the glass demonstration,pretty cool.i used to go to shores raceway in the summers(i lived in east detroit),didn't they have american tracks?used to go to jack and jill raceway too on 10 mile rd. as it was only blocks from where i lived.


  • Maximo likes this





Electric Dreams Online Shop