3139 replies to this topic

[team burrito]

Well, I had this crazy idea of building a F1 chassis with no main rails & here it is:

 

 

The pans are the main rails & slips under the front end. It's captivated in one place with limited movement.

 

 

And here's the bottom view; nothing to it.

 

 

I built primarily this for flat tracks & it is on the heavy side. BTW: this F1 design is being called K.I.S.S. #1 (Kinetic Internal Suspension System). Stay tuned for the test results.

 

 

 

[SlotStox#53]

Very nice simple chassis design! Often wondered how well & "no main rail" mostly brass sheet car would go... Here's to a good run around the flat track

[Duffy]

A "Concept" chassis for 4.5" IRRA™ stocker, working out plates & placement & stuf.

Last week I posted a pic on my FB page showing my basic layout for this sled, lying on top of a sketchpad with the components & some notes and dimensions written down. Evil tonyp snarked: "Real builders do it in their heads." And, ohhGod, I bought it. Big mistake. Built myself right into a corner, I did, overthinking and overclevering all over.

 

Look here:

 

 

So, starting with the nice supple Danse Fambeaux center section and the "Forward Flex" rigid rear out to front of motor, I hung a wire shaker perimeter to attach the forward pintubes to. Then, independent shaker pans go inside that. The inner-pan upstop is the rear anchor tube for the perimeter, and then there's a little tab on each pan for a downstop that bears on the rear plates - but also the rear shaker-pintube tubes solder to those tabs and also bear down on the perimeter - the idea is to transfer all the down impulses of the body to that wire, but in four stages: pintube shakers to inner pans to perimeter to center section. So everything locks in down impulses, but any up pull will unwind sequentially.

 

 

There's also some sidey-sidey and fore&aft shake in there. The plan was, .006" vertical motion thru three elements, .015" horizontal in perimeter & .030" in pans.

 

 

Here's a view of the whole blamed mess back aft. I swear I sat for an hour, staring dully at little bits of brass, stacking 'em & moving 'em around, trying to think -
- and all because tonyp hexed me. Ohhh I don't NEED notes, I can build it with my BRAIN...yah, right.

 

 

Like all those times before, it's the typical Duffy single-sprung double-bale axle hanger. This tangle of wire has resulted in only one catastrophic failure in two years of brutal racing, and that one soldered back in thirty seconds. I'm one of those who believes the un-wired mount is quicker and easier to repair, and the experience so far seems to support my idea that making multiple torsion points along the mount tends to forgive hard impacts to some extent.

 

I'll test this sled out this weekend, and if all goes well I can then some more and mull over how to make the damn next three easier. Stay tuned.

 

Duffy

 

[7D7 Hobbies]

WOW Duffy, it's awesome!!

[Rick]

A Frank Sinatra song comes to mind, Duff..................

[Tim Neja]

Russ---let us know how that baby handles!! It's definitely different and interesting!!! Very cool!!!

[Duffy]

A Frank Sinatra song comes to mind, Duff..................

 

 Listen, I'm just gonna skip right by the one I'm guessing you prob'ly meant and go with All Or Nothing At all. I mean, let's be honest.

[MG Brown]

What is a "scratch built" chassis in today's racing world?
 
Does this B & E Slotsport hardbody chassis (based on a Parma Womp) qualify as scratch built?
 


B & E Slotsport Facebook Page

[Gator Bob]

Darn, I have been thinking of making a Stock Car out of a 4.5" FCR for too long.

 

Let's see if we can't get a 'rail ruling' from the BoDy.

[Rick]

Nope! I Did It MY Way................

[slotcarone]

M. G. while those are nice scratchbuilt chassis I dont think they meet the main rail and/or the rear bracket rules from what I can see.

[Tim Neja]

While those chassis are very cool--their really "modified" chassis--NOT scratchbuilt IMHO!!

[MG Brown]

M. G. while those are nice scratchbuilt chassis I dont think they meet the main rail and/or the rear bracket rules from what I can see.

I don't believe that they were built to any national rules, I was just asking if they fit the modern definition of "scratch built"? Seeing as so many "scratch builders" use pre-formed parts these days...

[Bill from NH]

MG, Brian does more scratchbuilding on these stretched womps than many do on some of the chassis kits. So, if someone wants to call them stretched, modified, or scratchbuilt, who cares?

[MG Brown]

MG, Brian does more scratchbuilding on these stretched womps than many do on some of the chassis kits. So, if someone wants to call them stretched, modified, or scratchbuilt, who cares?

 

Bill- I think you and I are of the same mind about this, I was wondering what the general thought might be among the slot-bloggers.

[SlotStox#53]

Very nice scratch chassis using the Womp chassis as a base, thanks for posting MG Coming from racing such modified/scratch type cars using the womp as a base , these seem in the "scratch built/modified/tweaked hacked to bits genre !

[Gator Bob]

To ME, In the 'almost modern' world:

I would say a scratch built chassis consists of a preformed motor bracket and tongue, the rest is K&S.

Kits are not scratch but can be altered to suit.

Cut-ups are modified production.

 

All three offer room for creativity, it is what you want it to be..

 

A 'true' scratch build would be made of all K&S with out any preformed components (other than tubing).

 

But ... of course back in the day a screw together Dynamic was also called a scratch build, not a component kit.

 

Now bring in 3D printing ... that would be a modern scratch build .... LOL

[Samiam]

M. G. while those are nice scratchbuilt chassis I dont think they meet the main rail and/or the rear bracket rules from what I can see.

Mike,

You got IRRA on the brain

 

Those chassis are pretty cool. Though after all that cutting and fab work they do look an awful lot like a FCR.

 

We used to run sort of a "Spec Built" stretched womp for a Late Model Oval class. One cut perpendicular to centerline and two .063 piano wire rails soldered solid to both halves.

[Bill from NH]

I recall Fred "Da Flash" Strauss posting a few photos of those "Spec Built" cars on OWH when they were being run at Slots-A-Lot.

[Samiam]

I recall Fred "Da Flash" Strauss posting a few photos of those "Spec Built" cars on OWH when they were being run at Slots-A-Lot.

Ran these cars on the oval at The Slot Spot on Rt 109 in Lindenhurst. Can still hear the owner Danny Marcello aka the Wild Child (RIP) yelling "LINE 'EM UP"

[John Gorski]

Multi Rail CanAm..13 of .032 a side 26 rails.

 

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[stemmy]

Sweet ride John.

[Gator Bob]

Outstanding John !!!!

Beautiful as a chassis could be  

 

Lucky 13?

[RichardE]

John, have you tried it yet?  How does it handle?

 

Richard

[Brinkley47]

The door by boolaman

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