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2017 Exothermic Thingie


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#51 havlicek

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Posted 24 October 2017 - 06:35 AM

John, not if you have a lathe. :laugh2:

 

Thin pieces stacked to make a rotating mass introduces harmonic vibrations.

If a lathe is available, it would be easier to open up some undersized tubing to a "proud" .078" ID.  The "stacked pieces thing" is more of a *potential* issue with an armature than a "geared-down" axle spinning far slower, and even less so with a vintage car where the axle isn't spinning all that fast.  Then too...it's far less likely even still to be any kind of issue with fronts!  Pablo's solution (*arm spacers) is the best practical one!


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#52 Pablo

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Posted 24 October 2017 - 11:12 AM

Using a solid .078 wire front axle soldered to rail uprights has absolutely nothing to do with "rotating mass".

My axle doesn't rotate and the keepers don't rotate. They do absolutely nothing except keep the wheels in place.

 

Why is this even being discussed here? :unknw:


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Paul Wolcott

#53 Samiam

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Posted 24 October 2017 - 03:28 PM

I was waiting for the drift to some sort of food. :)


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#54 havlicek

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Posted 25 October 2017 - 05:38 AM

Using a solid .078 wire front axle soldered to rail uprights has absolutely nothing to do with "rotating mass".

My axle doesn't rotate and the keepers don't rotate. They do absolutely nothing except keep the wheels in place.

 

Why is this even being discussed here? :unknw:

 

True.  I'm just happy whenever I see a slot car with actual front wheels!


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John Havlicek

#55 Pablo

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Posted 25 October 2017 - 09:25 PM

My theory is, the only good wheel on a slot car is one that stays out of the way,

doesn't add any weight, and doesn't influence the car other than a very light outrigger effect :)

 

I love the Tamiya BB fronts for Thingies. I still thank Maximo for introducing me to them :friends:

 

Tilting jaildoor body mounts are hinged via .032 wires. Downstops are .039 wire. Lift is about .025

 

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With only one pair of main rails connected to the bracket, I needed more redundancy.

I fashioned a set of .039 wires connecting the rails to the rear "U" brace - just in case

 

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Tomorrow, front wheels and a tumble :D

 

 


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Paul Wolcott

#56 Pablo

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Posted 26 October 2017 - 02:14 PM

Best way to extract the dummy axle is slice it into short pieces.

That way it doesn't take much heat to remove it.

Then uprights are quick swiped with Soder-Wick®

 

IMG_7348.JPG


Paul Wolcott

#57 Pablo

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Posted 26 October 2017 - 02:56 PM

Front wheel assembly drops right in. Note the .032 rod piece underneath to mimic desired front clearance.

Uprights tacked in a few places; now the O-rings can be removed, soldering finalized, and into the tumbler

 

IMG_7350.JPG


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Paul Wolcott

#58 Pablo

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Posted 26 October 2017 - 04:52 PM

As the chassis tumbles, I turn my attention to the body.

Outside washed with Dial liquid soap and paper towel; inside with Dial on 0000 steel wool.

 

Both rear corners are split all the way up, but that's OK.

Gives me an excuse to remove the entire rear end and let that air escape :dance3:

I'll deal with that later - for now, all I need to do is be aware of it and be careful to mask it

 

IMG_7358.JPG


Paul Wolcott

#59 Pablo

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Posted 26 October 2017 - 06:53 PM

Waterslide vintage decals gifted by Samiam :)

 

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#60 Pablo

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Posted 27 October 2017 - 08:44 AM

Out of the tumbler

 

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Paul Wolcott

#61 Pablo

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Posted 27 October 2017 - 02:49 PM

Quality control check for ride height:

With the rear elevated .063, Jet Flag sitting in a non-recessed slot, bottoms of front wheels are slightly elevated.

Once on the track, the wheels will barely touch and the front clearance will be about .032 as planned :ok:

 

IMG_7395.JPG


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Paul Wolcott

#62 Pablo

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Posted 27 October 2017 - 03:56 PM

New, modern Marklin train wires - thin, light, and I trust them enough to do them single.

Classic flag weights usually need a couple 10 thou washers up top to make it clear the roof of the Jet Flag.

When done right, this combo makes for a very precise and wobble-free flag

 

IMG_7400.JPG


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Paul Wolcott

#63 Pablo

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Posted 28 October 2017 - 07:49 PM

Exothermic body

 

IMG_7410.JPG


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Paul Wolcott

#64 Maximo

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Posted 28 October 2017 - 08:50 PM


So far a work of art.

No doubt.

maXimo
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#65 Pablo

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Posted 29 October 2017 - 08:26 PM

Thanks Maximo :)

Body is trimmed and pinned

 

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Paul Wolcott

#66 havlicek

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Posted 30 October 2017 - 06:03 AM

Just checking-in Pablo, and wowsers...that's one great-looking thingie.  Strike that, that's one great looking car!


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#67 Pablo

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Posted 30 October 2017 - 03:11 PM

Thanks :D  I can hardly wait to get the powerplant in there :dance3:

Possible track test next Saturday....


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Paul Wolcott

#68 mike1972chev

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Posted 30 October 2017 - 07:29 PM

As always TOP NOTCH work Mr. Pablo....... :good:


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#69 Pablo

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Posted 31 October 2017 - 07:44 PM

Thanks Mike :)

 

JK 48P 7T solder-on straight steel pinion installed

 

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Powerplant installed and wires connected

 

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Believe it or not, only one thing prevents finishing this car tonight - lack of Rit dye :laugh2: I'll get it tomorrow.

No way can I put a pink part on a fighter jet :stinker:


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#70 Pablo

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Posted 01 November 2017 - 05:39 PM

Parma Pink Crown, dyed blue and ready for business

 

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Car passes the drivetrain test with flying colors.

Wheels spin effortlessly and instantly at the "click" of the power supply. She revs free and sounds happy :good:

 

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Total weight is 117 grams and balance point is midway between the axles.

Ready for track test this Saturday :)

 

IMG_7450.JPG

 

 


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#71 Jairus

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Posted 01 November 2017 - 10:51 PM

Very pretty car Paul! :good: :good: :good:


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#72 Pablo

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Posted 02 November 2017 - 09:50 AM

Thanks Jairus :D


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#73 Dominator

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Posted 02 November 2017 - 11:13 AM

Another master piece Pablo!
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A motor is only as fast as the chassis it's in.
 
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#74 Noose

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Posted 02 November 2017 - 12:34 PM

Sweet! Good job!


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#75 miko

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Posted 02 November 2017 - 10:37 PM

Very nice and clean build!


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#76 Pablo

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Posted 04 November 2017 - 07:54 PM

Thanks guys! :)  Track test was a complete home run, handles and scoots great, motor runs cool.

Zero deslots, zero problems. Exothermic Thingie is done and it is for sale, PM me for details.


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#77 Pablo

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Posted 07 November 2017 - 05:24 PM

Sold.


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