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Choti #5 ultra-thingie


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#1 Pablo

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Posted 12 August 2018 - 08:09 PM

The Noose paint job is out-of-this-world beautiful.

I am very proud to have been selected as the car builder :)

 

IMG_0143.JPG

 


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Paul Wolcott




#2 dc-65x

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Posted 13 August 2018 - 09:30 AM

Hi Pablo,

 

Great looking body!

 

Does you customer want an original San Francisco style lightweight like this one by Dave Lenz?

 

Dave Lenz Thingies - 045.JPG


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#3 Pablo

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Posted 13 August 2018 - 09:46 AM

Planning phase hasn't really begun yet. Thanks for the idea! :good:


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#4 dc-65x

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Posted 13 August 2018 - 09:51 AM

Some more ideas, here's a link to my thread on the Dave Lenz slot box and cars:

 

Dave Lenz Thingies

 

I have extra "UGO" style guide tongues and motor brackets if he's interested.


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#5 Pablo

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Posted 13 August 2018 - 10:01 AM

Very cool, thanks!!! :D

Soon as I complete my Ferrari Grand Prix chassis n body I'll be giving this my full attention......


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#6 Pablo

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Posted 16 August 2018 - 09:10 AM

Dave Lenz Thingies

 

I have extra "UGO" style guide tongues and motor brackets if he's interested.

YES please ! :D I am studying your Lenz thread fully :dance3: 

A powerful vintage motor, 1968/9 style, with a Lenz style strong piano wire perimeter style chassis, mini-wheels up front, 13/16 OD rear wheels, etc.


Paul Wolcott

#7 dc-65x

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Posted 16 August 2018 - 10:53 AM

Hi Pablo,

 

I've got you covered. Let me know if you need anything else for the build............


Rick Thigpen
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#8 Pablo

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Posted 19 August 2018 - 09:12 PM

A little bit of juggling here. I have a test opportunity coming up 1 September and I'm going to kill 2 birds with one stone. I have the Lenz style chassis all planned in my mind but I'm not sure how a light wire chassis is going to react to a strong 1968-era pro motor. I'd like to get an idea of how the Choti Ultra will behave. So, my plan is to quicky slap together my basic design using a Rehco bracket, test motor, test repop Choti, etc. and track test it.

 

As long as I'm making a test motor, my Ferrari V12 Grand Prix vintage "Body n Chassis" has gotten zero interested buyers so I'm going to move forward and make it a complete car. It needs a similar style motor - inline, 16D, big, and powerful.

 

So I went ahead and blueprinted a motor for the Ferrari, and it will serve as a test motor for my test Lenz Choti. Old style Mura can and endbell, shimmed magnets, 36D size brushes, Pro Slot custom made endbell drive arm with S16D specs. Soon as I test the Choti, she comes out and goes into the Ferrari

 

IMG_0164.JPG


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#9 Pablo

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Posted 23 August 2018 - 04:19 PM

I'd like to get an idea of how the Choti Ultra will behave. So, my plan is to quicky slap together my basic design using a Rehco bracket, test motor, test repop Choti, etc. and track test it.

Test chassis is done - quick and dirty

 

IMG_0167.JPG


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#10 don.siegel

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Posted 23 August 2018 - 04:35 PM

Nice one Pablo, very typical! 

 

What did you do the front axle out of? Looks a slight bronze tinge, otherwise I would have assumed piano wire... and how do you get the bends equal? (don't tell me it takes a lot of work... I want a simple, secret solution....)

 

Don 



#11 Bill from NH

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Posted 23 August 2018 - 09:30 PM

Don, measure multiple times, bend once. :laugh2:  :laugh2:


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#12 Pablo

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Posted 24 August 2018 - 06:14 AM

Thanks Don, but I think you may have missed where I said this is just a "test monkey" chassis.

It was quickly slapped together as a means to test the basic package before actual construction begins.

 

That way I'll have a rough idea of where added weight is needed, handling habits, etc. before I start the real one.

Matter of fact, the owner hasn't even approved of the concept. I won't even submit the idea until I drive the test monkey 1 Sept.

 

Back to your "dropped axle" question, it has that yellow tinge to it because it's brass rod   :laugh2: It only has to survive a few laps. It's bendable so I can tweak it with my fingers, then use it as a template for the real one later if I desire.

 

The tools I use are a Sharpie, protractor, pliers, educated strong meaty fingers, and a small steel ruler graduated in 64ths.

 

-leave both ends long

-bend first inner angle and measure the angle

-mark where the pliers need to begin the second inner bend, and bend it

-measure angle of second bend and make it same as the first

-tweak for flatness

-mark both second outer bends equidistant from inner bends and bend them parallel to center section

-mark centerpoint of axle and center it on the chassis; use a wheel and retainer to judge where to cut an end to make the width correct

-measure distance from outer bend to cut and make other side the same length

-double check flatness

 

If you do a test axle with brass rod like I did, it's easier to correct errors as you go, and now you have a template to use for your piano wire real one :dance3:


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#13 axman

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Posted 24 August 2018 - 06:58 AM

C'mon... some of you guys that make the same part over and over must surely use a bending jig?


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#14 Bill from NH

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Posted 24 August 2018 - 07:29 AM

Kim, I've owned the small RGEO bending jig since about 2005. Before that purchase, I built with my hands & pliers since starting in the '70s. Today, all local commercial raceways in this area have closed & I do little building, so the bending jig gets little use.  

 

Pablo, I thought I saw brass rod in other areas of that chassis too.  :laugh2:


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#15 Pablo

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Posted 24 August 2018 - 07:37 AM

My work is custom, not mass production. I don't "make the same parts over and over".

Lots of guys use jigs but I don't. I like the satisfaction of bending something by hand and nailing it perfect.

Also, I don't force anything into place when soldering - if it doesn't fit perfect I make it so.

 

The test monkey being an exception, of course. If you look close you can see parts aren't straight and it lacks redundancy. Bill, the axle is the only brass rod piece on the monkey :)


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#16 axman

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Posted 24 August 2018 - 08:03 AM

Agree.. I gotta say... production of the same thing over and over is not my gig either.. mind you, I'm sure building slot car chassis for so many years is why I've lost my sense of smell.. all those flux fumes!

Love your work guys.


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#17 Bill from NH

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Posted 24 August 2018 - 04:09 PM

 

 Bill, the axle is the only brass rod piece on the monkey :)

 

Okay, but other parts in the photo had a slight yellow tint in places. I've seen this happen to piano wire  in other photos. Did you use some of your un-straight piano wire lengths when you built your test monkey? You didn't use Swiss's plated piano wire to build it did you? :laugh2:


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#18 Pablo

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Posted 24 August 2018 - 04:17 PM

-it's just the lighting

-non-straight wire goes straight into the round file as soon as it arrives at The Ranch

-I haven't used Swiss wire yet but no doubt it's the bomb diggety.

 

Y'all are sure getting wound up about my test monkey. I'll sell it after the test to you for $100 :laugh2: :crazy: :good:


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#19 Pablo

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Posted 24 August 2018 - 04:53 PM

Test monkey roller is ready for the test monkey body.

All parts shown are test parts only :)

 

IMG_0170.JPG


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#20 olescratch

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Posted 24 August 2018 - 08:01 PM

   That's one hell of a test monkey, better than my best!


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#21 Pablo

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Posted 25 August 2018 - 07:26 AM

Test monkey car is complete. I know she's way too light up front as is.

I'll start adding weight in different places and see what happens  :)

 

IMG_0176.JPG


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#22 Pablo

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Posted 27 August 2018 - 02:50 PM

Added a Classis flag weight, a 7 gram truck wheel weight, and a small piece of stick-on lead underneath. This brings the balance point to about midway between the axles (right at the piece of tube)

 

IMG_0178.JPG


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#23 Bill from NH

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Posted 27 August 2018 - 03:52 PM

What, no "Pablo" tag! :laugh2:


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#24 Pablo

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Posted 01 September 2018 - 10:23 PM

Track test results: ran super right out of the box, no tuning needed :good: :sun_bespectacled:


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#25 Jairus

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Posted 02 September 2018 - 09:09 AM

Looks fast Paul!
Just remember to replace that front axle with a steel one.  I made that mistake only ONCE. {eyeroll}


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