475 replies to this topic

[Mark H]

<p style="margin-left: 40px">damn you Jairus i was bidding on that lol, you sure rebuilt it purdy though!</p>

[Jairus]

Sorry Mark, I had my limit set... you should have pushed it further. At any rate the parts will end up in three new projects so nothing goes to waste.

[Mark H]

haha its all good. i know its in good hands

[havlicek]

Oh my (small "g") god Jairus. How are you going to drive that thing(ie)!? Of the total 95g, how much is motor?

-john

[One27ray]

Looking good there Brother J!!

Wow! you make it look so easy I can see way they went to the deepdish style of body- real air-scoopers- to help keep the chassis slammed down on the track!
I'm molding some of the other Deepdish styles and others to take advantage of this style of chassis
i-ray

PS, now to get together a motor lol. John does some fine work !

[Jairus]

Good morning John!
You know how much a "B" can Mura weighs don't you? It's a LUMP and weighs nearly half the total car at 40g+. I thought about cutting down the can much like an article I saw in a Model Car Science. DC-65X did it in a thread here a short time back.

Of course if I could ask you to build me a killer thinwall Mubuchi motor with a vintage Mura endbell?
(I got all the parts here.)

[Jairus]

Okay, here's the Mule all ready for road testing! I hogged on some paint late last night. Nothing fancy and probably won't go any further with the detailing on this one.




Motor has been bench tested at 2v for about 3 minutes to make sure the gear is worked in nicely. The motor sounds about as close to the scream a modern wing car makes and is nearly as responsive! Not sure what magnets John put in, but they definitely look ceramic.
BTW those heat sinks really work as they get pretty warm...
But, as I mentioned, the motor is still fairly heavy! I think for this car to go any faster I'll need to see about building one that is about 10 grams lighter.

Going into the mail tomorrow.
Guide is a Jet Flag dyed black.
Front wheels unknown, prob. U-Go.
Rear wheels unknown.
Body by O2R.
Motor Mura.
Gears Parma/Cox 7/28.

[havlicek]

Looks deadly Jairus. I just hope that arm was done AFTER I started welding the com tabs! On the weight aspect, it seems to me that the weight of the motor in this case just might be a good thing...but what do I know?! The other thing that struck me is the front axle mounting seems awfully fragile.

-john

[Gator Bob]

Looks Great, Jairus..


I'm staying tuned.

BTW: What is the thickness of the body?

[endbelldrive]

Looking great! Body flex can be your friend if the forces are applied to the right spots on the chassis. Happy testing, J!

[Jairus]

Thanks Bob! Testing is everything and Bryan is the best in the biz!

Looks deadly Jairus. I just hope that arm was done AFTER I started welding the com tabs! On the weight aspect, it seems to me that the weight of the motor in this case just might be a good thing...but what do I know?! The other thing that struck me is the front axle mounting seems awfully fragile.

-john

Yes the com tabs are welded. You sent me this motor last year with hand made bussbars. (which I swapped out for a more period correct endbell and hardware.)
As for the front axle, the body would have to be torn away or damaged to get at the axle with enough force to rip 3/4" of silver solder joint. I think it will bend before breaking. But that too is part of the test!

Looks Great, Jairus..


I'm staying tuned.

BTW: What is the thickness of the body?

Body is .020 Petg pulled by Brother Ray and painted with Parma acrylics.

[Gator Bob]

I love the matching Tan Tires and stripes too

Hey, Nice Body Ray !

[Mark H]

Cool car!

[havlicek]

I'll bet that bad boy is stupid fast (it looks fast just sitting there)...and will heat up a controller too!

-john

[One27ray]

Hey J.

I can make the body in .015 and/or .010 to reduce weight too, but don't know if the structural integered would hold up? BTW really cool slammer man!!

i-ray

[Jairus]

Hey Ray, if people want to go vintage in the chassis, I think we really SHOULD go vintage with regard to the plastic thickness. .020 is the industry standard today with most vintage cars cast in .030! Lets just stay .020 okay?

(P.S. Interesting Edo and George are silent...)

[One27ray]

Hey J,

No problem, .020 would be fine with me, .030 does make it heavier and prone to cracking on impack. Proably why we don't see a lot of bodies from that period? espeacially the Onewinger with the tall side wing.

i-ray

[HarV Wallbanger III]

Jairus are the heat sinks aluminum? If not there is some weight also....

[Bill from NH]

Heatsinks appear to be copper. Hi-Pro in CT made & sold copper ones like these in the mid-70's.

[Jairus]

I am building a new motor with same power as that Mura but 10 grams less weight. The heat sinks will be aluminum and hand cut. That will be the motor for the second test. ;-)

[draggon]

I'm getting confused. My home track was rough, so we ( at least me ) always ran drop arms, usually 3/4 or so solid brass. Frames were piano wire, two or three rails, with outriggers for mounting the body, and a little weight there seemed to aid the handling. Whenever floppy pans came in ( 67? 68? ) I added those. My best handling thingie was pretty close to the designs of then current angle winders, just as an inline. A Pink Mura had no trouble pulling the weight. That was in 1969. As you can see, what I ran back then was nothing like the U-go frames. Also as far as the body goes, as I read it, no stapled on wings, but thats what we did. Rays one-winger looks just like our did after stapling on that wing. So what is it? No one made those one wingers back then.

[Jairus]

I don't think we are going to go so far as to say 'no drop arms' and limit chassis design too much as long as it is in the "Spirit of the time period". Indeed by 1970 pan chassis with plumber movement was the norm on the shop wall and in the Pro-racers slot box.
But the trend on the West Coast was indeed toward lighter weight fully aero based designs and that was what we want to explore in this race.

But this race will be on two very swoopy Kings. I don't think there will be much need for movement.

[One27ray]

Humm..

According to Dave Larson," The Vitter " they did make the Onewinger back then and raced it. If I recall, LSCM brought the one on e-bay that someone was selling back a few years ago, a Vintage 60's Choti Onewinger body .



PS check out Daves old thread on this subject- He explains it all.

[Jairus]

Which thread Ray?
I found this one....http://www.slotforum...opic=19770&st=0

Lots of great Thingie info shared there, Glenn included, that explains what it was like back in the day.

[One27ray]

+++

I'm refuring to the thread that had this onewinger build by Dave- not sure if it was here or at SF



where he explained the history etc. of W/C Onewinger