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Choti Ultra #5 "Test Monkey" car


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#1 Pablo

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Posted 09 June 2019 - 04:26 PM

In my "Choti #5 ultra-thingie" build:

 

http://slotblog.net/...-ultra-thingie/

 

I needed to make a quickie test chassis and body to pre-test my plans for the real car. After it was successfully tested, I removed some key parts and was left with this hanging around gathering dust:

 

IMG_2421.JPG

 

The chassis wasn't a precise work of art and lacks redundancy bracing. The body has test holes and a plain jane paint job. I plan to build it into a complete car.

 

If you want a nice handling Thingie at a budget price, this may be one to consider  :)


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#2 Pablo

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Posted 09 June 2019 - 06:56 PM

Chassis specs are WB 4 1/8", GL 1.0", chassis width 2.9", rear wheels 13/16" X 5/8", rear track 3.0", front track 2 7/8", Clearance .032/.063

 

Steel tongue tilted a couple degrees for sloped front to rear clearance, floated onto a 1/16" thick brass chunk, tapered down to form fit the rails.

 

IMG_2426.JPG


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#3 Pablo

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Posted 12 June 2019 - 05:30 PM

As per my usual practice on a wire front axle, I first made a test monkey out of brass rod.

Easier to bend and if it's not perfect I just keep tweaking it until it is.

Then I measure the angles (8 degrees) and make a real one out of plated Swiss .063 wire

 

IMG_2432.JPG

 

Brass cross section rail connector/strengthener is 1/2" X .025"

 

IMG_2427.JPG

 

IMG_2435.JPG


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#4 Pablo

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Posted 12 June 2019 - 07:54 PM

.039 wire "L" braces reinforce the axle. I doubt they need wire wraps but I did it to make the wire wrap police happy  :sarcastic_hand:  :crazy:

 

IMG_2439.JPG

 

More redundancy and strengthening back aft

 

IMG_2444.JPG

 

untitled.png

 

 


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#5 Pablo

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Posted 12 June 2019 - 09:44 PM

My original and best mentor, William Fernald (Bill from NH) should be super proud:

-Hobby Lobby beading wire worked super for reinforcing the front axle

-No fancy tumbling, just a liquid soap/baking soda/SOS scrub

-Engraved "Pablo" tag on the bottom

 

IMG_2452.JPG


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#6 Bill from NH

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Posted 12 June 2019 - 09:49 PM

"Monkey see, monkey do." You're learning!  :laugh2: For awhile, i was wondering why your wraps were so neat. :laugh2:


Bill Fernald
 

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#7 Jaeger Team

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Posted 13 June 2019 - 01:05 AM

-Hobby Lobby beading wire worked super for reinforcing the front axle
Good Paul! May I ask what is the gauge?


Maurizio Salerno

#8 Bill from NH

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Posted 13 June 2019 - 06:28 AM

Beading wire is usually available in several gauges. The last I bought is 26 ga.


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Bill Fernald
 

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


#9 Pablo

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Posted 13 June 2019 - 08:13 AM

My bead wire is 26 also.

 

If anybody fancies possibly buying this car once complete, now would be a good time to tell me your preference for a motor.

I can build up a custom vintage rocket powerplant, or a toothbrush motor, probably a JK Hawk Retro  :)


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#10 Pablo

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Posted 14 June 2019 - 07:51 PM

Making progress. I'm not trying to impress anybody with a used test monkey. Just documenting it  :)

 

Used JK Hawk Retro motor, used ARP 9T pinion, attached to the bracket with a 2mm screw on top and soldered below.

Sounds simple but doing it with care is the only way I know how

 

IMG_2460.JPG

 

IMG_2461.JPG

 

Standard thickness Parma "The Blade" blueprinted, one Koford bronze 10 thou spacer below, secured with a Parma nut.

Parma brass clips tinned and ready for the yellow wires (I forget what brand they are) 

 

IMG_2462.JPG

 

WalMart earring clutches are small, light, and cheap 

 

IMG_2464.JPG


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#11 Bill from NH

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Posted 15 June 2019 - 01:35 PM

Here's something you could try on the final chassis. Instead of using an earring back for leadwire control, you could use the Tony P. method of using tubing soldered to the mainrails. This would free up space to put your "Pablo" plaque on top of the brass crosspiece, as you like, & allow you to continue mounting drivers using piano wire & earring backs. :)


Bill Fernald
 

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


#12 Pablo

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Posted 15 June 2019 - 03:05 PM

I guess you didn't read my OP. This is the final chassis  :D

 

Twin .063 lead chunks attached with 3M #80 and some CA. Combined weight is 7 grams

 

IMG_2472.JPG


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#13 Bill from NH

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Posted 15 June 2019 - 07:43 PM

You titled this thread "Test Monkey", therefore I figured you weren't building the final frame. Sometimes they say "a pictures says a thousand words."  :laugh2:  :laugh2:  :laugh2:


Bill Fernald
 

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#14 Pablo

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Posted 16 June 2019 - 06:43 PM

Car is complete, total weight 84 grams, balance point is halfway between the pin tubes. Decals added for bling. Parma flag, Parma "old skool" nut and brass clips, Parma O-ring 1/2" fronts; Koford bronze spacer, TQ thin lead wires

 

IMG_2476.JPG

 

 

Passes the drivetrain test fine; gearing is 9/27. Rear axle is a PCH custom cut to exact length. Parma pink crown dyed black and balanced by using a hollow set screw. Spacers are Champion/Slick7/Teflon sandwiches  :)

 

IMG_2477.JPG

 

Rear wheels are vintage shod with fresh modern natural rubber

 

IMG_2488.JPG

 

IMG_2491.JPG

 

IMG_2495.JPG

 

 

 

 

 


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#15 bluecars

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Posted 16 June 2019 - 07:31 PM

Looks great Pablo. Especially the Ricky Ticky Sticky.


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#16 Peter Horvath

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Posted 17 June 2019 - 07:42 AM

That's killer, Pablo.


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#17 Pablo

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Posted 17 June 2019 - 09:27 AM

Thanks guys  :)  If nobody makes an offer via PM by later today, I'll start a sale thread on Swap Shop.

This is a reasonably priced used car that will accept a wide variety of motors and can be hammered like a flexi without worrying about destroying rare parts.


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#18 Pablo

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Posted 18 June 2019 - 09:22 PM

Sold. 


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