Search found 475 matches
- Thu Mar 20, 2008 3:26 pm
- Forum: General Car/Truck Racer Topics
- Topic: Is Tungsten Safe?
- Replies: 14
- Views: 10367
Re: Is Tungsten Safe?
Here is an excerpt of the Material Safety Data Sheet from Midwest Tungsten Service: "Effect of Overexposure: Dust, mist and fumes generated during physical or metallurgical treatment may cause mild irritation of the nose and throat. With the exception of two Russian studies that found early sig...
- Thu Mar 20, 2008 3:17 pm
- Forum: Construction Workshops
- Topic: Replacing Molten Lead with Bismuth?
- Replies: 12
- Views: 18970
Re: Replacing Molten Lead with Bismuth?
Perhaps a better answer is to buy cars that are drilled? Or drill your own? Then you could simply cast the tire weights into a cylinder that could be stuffed into the body with a little glue, and spackled shut.
- Thu Mar 20, 2008 6:50 am
- Forum: Construction Workshops
- Topic: Replacing Molten Lead with Bismuth?
- Replies: 12
- Views: 18970
Re: Replacing Molten Lead with Bismuth?
While bismuth can indeed be used in diamagnetic levitation, it requires quite a strong field. Tracks are aluminum, wood or plastic, none of which can be magnetized. This is an esoteric property, and it would be pretty tough for someone to rig anything non-obvious to help their car. For sure bismuth ...
- Tue Mar 18, 2008 9:59 pm
- Forum: Car & Semi-Truck Construction
- Topic: Roughing axles?
- Replies: 6
- Views: 5715
Re: Roughing axles?
Mass production = close race, I didn't create this monster but I will say, this will probably be the only time(3 more years) these boys (cubs) will ever operate a lathe or drill press. I hope this is a good experience and at least they understand the process. I’ve never seen the sales types offerin...
- Tue Mar 18, 2008 8:58 pm
- Forum: Car & Semi-Truck Construction
- Topic: Roughing axles?
- Replies: 6
- Views: 5715
Re: Roughing axles?
Are they Cub Scouts? In our pack we insisted that a parent be there during the meeting with each boy. Well, we let some sneak out for a quick errand, but I wouldn't tolerate them bugging out like we were babysitters. Have the parents help! Then again, some of those very parents have demonstrated whe...
- Tue Mar 18, 2008 8:27 pm
- Forum: Car & Semi-Truck Construction
- Topic: Roughing axles?
- Replies: 6
- Views: 5715
Re: Roughing axles?
To get the swage marks off I just have them carefully run a file against them. Then, I generally just have them use a strip of the appropriate grit paper that I have precut for them. The axle doesn't have to be concentric, since it isn't doing the turning. Sacrilege, sure, but that was before I came...
- Tue Mar 18, 2008 8:12 pm
- Forum: Car & Semi-Truck Construction
- Topic: I need everyones help!!!!!
- Replies: 6
- Views: 4682
Re: I need everyones help!!!!!
Until somebody finds lead in the patches, ain't nuthin' a guy can do. I went to the Chevy dealer to buy some parts for a '70 truck and got parts made in China! 0.o I think it cheats our country to buy from there, especially there, but that isn't going to change it. Bummer.
- Tue Mar 18, 2008 7:57 pm
- Forum: General Car/Truck Racer Topics
- Topic: 5th at District, we may have our first Council race ever...
- Replies: 94
- Views: 62144
Re: 5th at District, we may have our first Council race ever
Interesting. I hadn't realized that most stainless steel is non-magnetic. Still, the "pins" on our start gate are aluminum. Actually, they're 1" wide aluminum strips, so we have fewer staging problems with pointy-nosed cars. I believe that most nickel based stainless steel is quite m...
- Mon Mar 17, 2008 8:33 pm
- Forum: Car & Semi-Truck Construction
- Topic: Weight distribution
- Replies: 13
- Views: 9902
Re: Weight distribution
Is it a wood track? If it is, and the saw marks are still on the edges of the guide strip, the car could climb the rail. But, on the aluminum tracks, I would never expect that. 1 inch forward of the rear axle is pretty stable, especially on a metal track.
- Mon Mar 17, 2008 8:20 pm
- Forum: General Off Topic
- Topic: So, what does your username mean?
- Replies: 77
- Views: 1101853
Re: So, what does your username mean?
Gravity...what makes the cars go. Steve...my first name. How prosaic is that, in a forum like this? A little history: I have a BSc. in Physics, and worked as a mechanic for many years- I can fix anything from lawn mowers to bull dozers, drill presses to welding torches. I used to drag race, but that...