Jump to content




Photo

Ram's 3-volt beast - a road-race version


  • Please log in to reply
106 replies to this topic

#26 HarV Wallbanger III

HarV Wallbanger III

    Racing inta OLD age!

  • Member at Peace
  • PipPipPipPipPipPipPipPip
  • 6,165 posts
  • Joined: 19-June 08
  • Gender:Male
  • Location:"Whisper'in Pine Ranch" Northern Nevada Sierras

Posted 21 May 2021 - 11:43 AM

Beautiful job Rick!


Barney Poynor
12/26/51-1/31/22
Requiescat in Pace





#27 dc-65x

dc-65x

    Grand Champion Poster

  • Subscriber
  • PipPipPipPipPipPipPipPip
  • 6,821 posts
  • Joined: 14-February 06
  • Gender:Male
  • Location:Captain Rick: The only vintage slot car nut in SW Oregon?

Posted 21 May 2021 - 03:45 PM

Thanks guys. 

 

Joe, I did a rudimentary check of the balance point of the motor and it seem very close to its centerline. That's a good thing because I've already drilled the mounting holes in the axle bracket to center the motor. 

 

And speaking of the motor bracket, I bought the metal for this project mostly from OnlineMetals.com (link below). They will custom saw cut by the inch for small orders like mine:

 

OnlineMetals.com

 

That square tube is about the same width as the motor and its length is perfect for mounting the motor in the center of the car like Rodney and I discussed. It's plenty stout with its 1/16" wall thickness and the square shape acts like a built in rear axle brace.

 

The problem is that it is HEAVY at 1 3/4 ounces:

 

Beast chassis (7).JPG

 

To fix that we need...............

 

neo holes.jpg

 

..........no, no, we need HOLES. LOTS OF HOLES.    :crazy:   

 

The early magazine "hop up" articles show holes drilled everywhere. One of my favorite is this modification to an thin aluminum sheet Russkit Carrera chassis:

 

CM Sept 1966-less than 1 gram.jpg

 

The weight savings calculate out to less than 1/10 of a gram. With my thick brass piece I saved much more. The different hole patterns for each side would have taken only minutes to do with a CAD system. I spent hours moving around various size washers on the bracket to see where similar sized hole could be placed, measuring their location and making sketches.........lots of sketches:

 

K&B BB front wheels (10).JPG

 

First thing that 1" hunk of tube had to be cut down and squared up:

 

Beast chassis (2).JPG

 

No CNC mill, just cranking handles and reading analog travel dials:

 

Beast chassis (5).JPG

 

Beast chassis (6).JPG

 

It took hours of work but I think the results were worth it. The motor bracket weight was cut by more than half:

 

Beast chassis (8).JPG

 

Beast chassis (9).JPG

 

It's a big square beast for the back of the chassis......shaped just like the back of the beast of a body I'll be using for this build.  


  • Pablo, justDave, Slot Car Rod and 2 others like this

Rick Thigpen
Check out Steve Okeefe's great web site at its new home here at Slotblog:
The Independent Scratchbuilder
There's much more to come...


#28 Lone Wolf

Lone Wolf

    Posting Leader

  • Full Member
  • PipPipPipPipPipPipPip
  • 2,720 posts
  • Joined: 03-March 08
  • Gender:Male
  • Location:New York

Posted 21 May 2021 - 04:32 PM

Yikes! Wonderful.

 

Love the chamfering. It's all in the details.

 

Kinda puts me in the mood for a grilled Swiss and a pickle.

 

Never saw that Carrera article. Now I know why there are so many of these chassis ruined by amateurs on Ebay.


  • Pablo likes this

Joe Lupo


#29 Pablo

Pablo

    Builder

  • Administrator
  • PipPipPipPipPipPipPipPip
  • 18,363 posts
  • Joined: 20-February 06
  • Gender:Male
  • Location:Cleveland, Tennessee

Posted 21 May 2021 - 04:58 PM

It doesn't get any sicker (in a good way of course) than that  :heart:  :heart:  :heart:  :heart:


Paul Wolcott


#30 dc-65x

dc-65x

    Grand Champion Poster

  • Subscriber
  • PipPipPipPipPipPipPipPip
  • 6,821 posts
  • Joined: 14-February 06
  • Gender:Male
  • Location:Captain Rick: The only vintage slot car nut in SW Oregon?

Posted 22 May 2021 - 06:12 PM

Here are the gears to handle the torque of this beast:

 

DSCN0202.JPG

 

These are solder on gears but I chose to add a 4-40 set screw to the crown gear:

 

FSCN0206.JPG

 

Here's the big butt end of the ISO center section:

 

DSCN0209.JPG

 

unnamed.jpg

 

 


  • Peter Horvath likes this

Rick Thigpen
Check out Steve Okeefe's great web site at its new home here at Slotblog:
The Independent Scratchbuilder
There's much more to come...


#31 Pablo

Pablo

    Builder

  • Administrator
  • PipPipPipPipPipPipPipPip
  • 18,363 posts
  • Joined: 20-February 06
  • Gender:Male
  • Location:Cleveland, Tennessee

Posted 22 May 2021 - 07:15 PM

Sir, you may consider giving the FBI a heads up about this build so they won't come knocking unannounced. I'm sure the major automobile manufacturers, in the transition to electric, are already watching you  :wizard:  


Paul Wolcott


#32 mickey thumbs

mickey thumbs

    Mid-Pack Racer

  • Full Member
  • PipPipPip
  • 158 posts
  • Joined: 10-November 18
  • Gender:Male
  • Location:Western NC

Posted 22 May 2021 - 08:44 PM

The nose weights on the Cobra remind me of the tractors used in tractor pulls.


  • Bill from NH likes this
Mike Vernon

#33 dc-65x

dc-65x

    Grand Champion Poster

  • Subscriber
  • PipPipPipPipPipPipPipPip
  • 6,821 posts
  • Joined: 14-February 06
  • Gender:Male
  • Location:Captain Rick: The only vintage slot car nut in SW Oregon?

Posted 23 May 2021 - 04:47 PM

Guys, it's time to get the front end of this ISO center section in place. The front and rear will be connected only by the motor:

 

tractor.jpg

 

No, No ...........that's what we don't want it to do. Like a Lotus 49:

 

cosworth_dfv_goodwood_lotus_49_08062017_02_list.jpg

 

"The first thing to know about the Lotus 49’s usage of the DFV engine is that Team Lotus built the car around it. Not metaphorically, literally. The engine was a genuine stress-bearing member of the car, bolted between the monocoque and suspension/gearbox. Stiffness, already a major string to the 25’s bow? That was boosted, and with the issue of anti-vibration mounts now a non-factor, the 49 was lighter for it. Effectively all Formula One cars followed this technique, the first ever-present standard the 49 introduced to open-wheel racing’s elite series."

 

I chose a hunk of 6061-T6 aluminum bar stock............

 

Beast chassis (15).JPG

 

............and machined away everything until it appeared. Of course it had to have lightening holes drilled in it too:

 

Beast chassis (4).JPG

 

Bolted up to the front of the motor waiting for the next piece to be screwed on to those 3 tapped holes on the bottom:

 

Beast chassis (14).JPG


  • Pablo, Peter Horvath and Tom Katsanis like this

Rick Thigpen
Check out Steve Okeefe's great web site at its new home here at Slotblog:
The Independent Scratchbuilder
There's much more to come...


#34 Pablo

Pablo

    Builder

  • Administrator
  • PipPipPipPipPipPipPipPip
  • 18,363 posts
  • Joined: 20-February 06
  • Gender:Male
  • Location:Cleveland, Tennessee

Posted 23 May 2021 - 08:50 PM

:whistle3:


Paul Wolcott


#35 don.siegel

don.siegel

    Grand Champion Poster

  • Subscriber
  • PipPipPipPipPipPipPipPip
  • 5,756 posts
  • Joined: 17-February 06
  • Gender:Male
  • Location:Paris, France

Posted 24 May 2021 - 05:42 AM

3 tapped holes Rick? I see the two big ones on the bottom and one small one on the side, but none seems tapped for now - are those the 3? 

 

Nice Swiss Cheese Special in any case! 

 

Don 



#36 Tom Katsanis

Tom Katsanis

    On The Lead Lap

  • Subscriber
  • PipPipPipPip
  • 372 posts
  • Joined: 26-April 17
  • Gender:Male
  • Location:Melbourne, Australia

Posted 24 May 2021 - 06:37 AM

Don I thought the same thing but in the first pic with it laying on it's next to bar stock you can see 3 holes on the bottom side of the piece.

#37 don.siegel

don.siegel

    Grand Champion Poster

  • Subscriber
  • PipPipPipPipPipPipPipPip
  • 5,756 posts
  • Joined: 17-February 06
  • Gender:Male
  • Location:Paris, France

Posted 24 May 2021 - 06:52 AM

Ah, thanks Tom. 

 

Indeed, it's my keen sense of observation that's made me the famous writer I am today... 

 

Don 


  • Eddie Fleming likes this

#38 dc-65x

dc-65x

    Grand Champion Poster

  • Subscriber
  • PipPipPipPipPipPipPipPip
  • 6,821 posts
  • Joined: 14-February 06
  • Gender:Male
  • Location:Captain Rick: The only vintage slot car nut in SW Oregon?

Posted 24 May 2021 - 11:58 AM

Here's the next piece that attaches to the front motor bracket:

 

Beast chassis (7).JPG

 

Beast chassis (5).JPG

 

Everything is big, blocky and, well, beastly   :crazy:

 

Beast chassis (20).JPG


  • Tex, Peter Horvath, Rotorranch and 1 other like this

Rick Thigpen
Check out Steve Okeefe's great web site at its new home here at Slotblog:
The Independent Scratchbuilder
There's much more to come...


#39 Tex

Tex

    Grand Champion Poster

  • Full Member
  • PipPipPipPipPipPipPipPip
  • 9,227 posts
  • Joined: 07-July 06
  • Gender:Male
  • Location:Denton, TX

Posted 24 May 2021 - 02:57 PM

it DOES look beastly, in a good way! don't get in THIS bad boy's way, or else!


Richard L. Hofer

Remember, two wrongs don't make a right... but three lefts do! Only you're a block over and a block behind.

#40 dc-65x

dc-65x

    Grand Champion Poster

  • Subscriber
  • PipPipPipPipPipPipPipPip
  • 6,821 posts
  • Joined: 14-February 06
  • Gender:Male
  • Location:Captain Rick: The only vintage slot car nut in SW Oregon?

Posted 24 May 2021 - 09:18 PM

Tex, the ISO center section is going to be finished soon and will need some rear wheels and tires. 

I'm using K&B front wheels, Russkit drag rear wheels and Cox front and rear Chaparral Firestones. The rears are urethane versions from Paul's Slot Car Tires:

 

Wheels (1).JPG

 

I machined the Russkit drag wheels to the same specs as K&B rear wheels:

 

Wheels (4).JPG

 

The stock Russkit wheel on the left and the machined K&B look alike version on the right:

 

Wheels (3).JPG

 

The Paul's urethane tire and the finished wheel and tire combo:

 

Wheels.JPG

 

Time to finish off this ISO center section..........


  • Peter Horvath likes this

Rick Thigpen
Check out Steve Okeefe's great web site at its new home here at Slotblog:
The Independent Scratchbuilder
There's much more to come...


#41 boxerdog

boxerdog

    Race Leader

  • Full Member
  • PipPipPipPipPip
  • 877 posts
  • Joined: 10-November 10
  • Gender:Male
  • Location:Modesto, CA

Posted 25 May 2021 - 11:39 AM

it DOES look beastly, in a good way! don't get in THIS bad boy's way, or else!

 

For sure. When you factor in mass and velocity, it should be pretty intimidating!


David Cummerow

#42 dc-65x

dc-65x

    Grand Champion Poster

  • Subscriber
  • PipPipPipPipPipPipPipPip
  • 6,821 posts
  • Joined: 14-February 06
  • Gender:Male
  • Location:Captain Rick: The only vintage slot car nut in SW Oregon?

Posted 26 May 2021 - 08:30 PM

The last piece to fabricate for the ISO center section was the guide tongue cut from 1/8" thick brass bar stock:

 

Beast chassis (6).JPG

 

Dynamic style flat head screws holding things together:

 

Beast chassis (4).JPG

 

The finished ISO center section:

 

Beast chassis (21).JPG

 

I thought I'd see what it looks like with the guide and rear wheels on.........

 

Beast chassis (7).JPG

 

........and saw an unflattering familiarity with:

 

meter maid trike.jpg

 

NO!   Not a Meter Maid Harley trike! It's supposed to be a BEAST.    :laugh2:


  • Peter Horvath, boxerdog, Rotorranch and 1 other like this

Rick Thigpen
Check out Steve Okeefe's great web site at its new home here at Slotblog:
The Independent Scratchbuilder
There's much more to come...


#43 Bill from NH

Bill from NH

    Age scrubs away speed!

  • Full Member
  • PipPipPipPipPipPipPipPip
  • 14,314 posts
  • Joined: 02-August 07
  • Gender:Male
  • Location:New Boston, NH

Posted 26 May 2021 - 08:48 PM

You didn't bend any uplift in that guide tongue did you?  :)


  • Pablo likes this
Bill Fernald
 
I intend to live forever!  So far, so good.  :laugh2:  :laugh2: 

#44 Pablo

Pablo

    Builder

  • Administrator
  • PipPipPipPipPipPipPipPip
  • 18,363 posts
  • Joined: 20-February 06
  • Gender:Male
  • Location:Cleveland, Tennessee

Posted 26 May 2021 - 08:49 PM

I don't see a meter maid Harley at all. I see a tractor puller  :good:  :D  :heart:  :heart:  :heart:  :heart:

 

1200px-Tractor_pull_02.jpg


  • boxerdog and Rotorranch like this

Paul Wolcott


#45 Martin

Martin

    Posting Leader

  • Full Member
  • PipPipPipPipPipPipPip
  • 3,956 posts
  • Joined: 22-February 09
  • Gender:Male
  • Location:US

Posted 26 May 2021 - 09:12 PM

or this

Attached Images

  • images.jpg
  • 9d4cfcd19bd738814321152d92559fd0.jpg

  • Pablo likes this
Martin Windmill

#46 Isaac S.

Isaac S.

    Checkered Flag in Hand

  • Full Member
  • PipPipPipPipPipPip
  • 1,507 posts
  • Joined: 02-September 20
  • Gender:Male
  • Location:USA

Posted 26 May 2021 - 09:56 PM

Is it actually going to sit that low when finished? 

 

And I agree with Pablo, it looks like a tractor puller. 


Isaac Santonastaso

#47 Bill from NH

Bill from NH

    Age scrubs away speed!

  • Full Member
  • PipPipPipPipPipPipPipPip
  • 14,314 posts
  • Joined: 02-August 07
  • Gender:Male
  • Location:New Boston, NH

Posted 26 May 2021 - 10:18 PM

Up here, meter maids walk. The Mancherster police had a couple Harley trikes, 30 years ago. I know a NH lady in the town north of me who drives a pulling tractor with three hemi engines, Her name is Roselyn  Knox, she previously raced funny cars. 


Bill Fernald
 
I intend to live forever!  So far, so good.  :laugh2:  :laugh2: 

#48 dc-65x

dc-65x

    Grand Champion Poster

  • Subscriber
  • PipPipPipPipPipPipPipPip
  • 6,821 posts
  • Joined: 14-February 06
  • Gender:Male
  • Location:Captain Rick: The only vintage slot car nut in SW Oregon?

Posted 27 May 2021 - 11:01 AM

You didn't bend any uplift in that guide tongue did you?  :)

 
Bill, oh ye of little faith.   :laugh2:   You didn't notice the faint marks across the top of the guide tongue in the first picture in post #42. They were caused by me clamping the tongue in a vise and beating a slight angle into it:
 
 Beast chassis (15) (1).JPG
 
 

Is it actually going to sit that low when finished?


Isaac, the guide will be set to hold the front of the ISO center section up with 1/16" clearance and the rear tire diameter (1.160") holds the rear end up the same:

 

Beast chassis (14).JPG

 

Beast chassis (10).JPG

 

The Beast will look lots better when the rest of the chassis is attached........I hope!   :D


  • Peter Horvath and boxerdog like this

Rick Thigpen
Check out Steve Okeefe's great web site at its new home here at Slotblog:
The Independent Scratchbuilder
There's much more to come...


#49 Bill from NH

Bill from NH

    Age scrubs away speed!

  • Full Member
  • PipPipPipPipPipPipPipPip
  • 14,314 posts
  • Joined: 02-August 07
  • Gender:Male
  • Location:New Boston, NH

Posted 27 May 2021 - 07:10 PM

I thought those were grind marks on the tongue.  :laugh2: Is the 1/8" brass used "half hard" or something else?


Bill Fernald
 
I intend to live forever!  So far, so good.  :laugh2:  :laugh2: 

#50 Isaac S.

Isaac S.

    Checkered Flag in Hand

  • Full Member
  • PipPipPipPipPipPip
  • 1,507 posts
  • Joined: 02-September 20
  • Gender:Male
  • Location:USA

Posted 27 May 2021 - 08:00 PM

Okay, makes more sense


Isaac Santonastaso





Electric Dreams Online Shop