Derby Talk

Our team was the ones riding on 3 wheels and a guide. We finished 4th, 5th, and the other 3 were in teens and twenties. As hard as we try we cant seem to get to first :thinking: Grats on your first place finish! Here is a pic of our team this year. http://i132.photobucket.com/albums/q4/kmgoebel/IMG_...

Has anyone ever tried making an axle that was grooved into a v, say 5 degree or so that caused the wheel to self center not hitting the nail head or body during the heat. On a 3 wheeler, only the back 2 could do this but it might help with friction between the head of the nail and wheel hub. Essenti...

Hi, cool looking car. Does all the weight go behind the rear wheels? Just curious looks like it might do wheelies

While it appears to be pretty tricky to reduce the drag around the outside of the wheels, we were wondering how much drag or turbulence was generated inside the wheel. I saw a car that had an insert that attached to the car and filled the wheel cavity like a round donut. There was 1/16th or so clear...

Hi all, Thought you might like this story. This past weekend my nephew had his district finals for the Pathfinder district in St. Louis and of course...someone had to cheat to try to win. The rules clearly state no material may be removed from the inside of the wheel. All you can do is flatten the t...

Nice cars! How much of the work did your 5 year old do?? This is something that keeps coming up. Is the intent of the question to suggest that the car is too nice for a 5 year old? If so, should we give em a block of wood and some power tools and see what they create? Should we help just enough to ...

Lucky13, I know where you are coming from. I did some testing and the best car had 1.5 oz behind the rear. If I moved some up, I lost time. But, I was beaten by a car with all the weight in front of the rear axle. So, the jury is still out for me. I think there may be some gravitational influence th...

Putting the weight too far back is great if you like having the front end bang back and forth into the rail. We tried a number of times and hundreds of test runs later, I am convinced most of the weight has to be in front of the rear axle. If the weight is too far back, you can align and align, you ...

The guy claims the stuff is 19.3 g/cm. I'll impress upon him the importance of the density.

The way I'll order them is by the grams each guy wants. I was just using the 1/2" for getting a price.


I'll let you know as soon as I hear something.

Kurt

Or, is there a size someone wants like 3/4" ? But, he does not have any size bigger than 1" diameter.

Kurt

Guys,

I am getting prices from someone I know for 1" diameter, 1/2" thick, 19.3 g/cm. ~120 grams total.

I'll let you know.

Kurt

I am talking to a guy who will make tungsten into whatever shape you want. I'll have to ask him if he wants to post here for fellow pineheads to contact. Pinenut, I have tested cars with the weight spread out (from in front of the rear axle to the very rear of the car) and with concentrated all in f...

with most of what 2K10H is saying, but, having ALL the weight in front of the rear axles is not always the ideal location. Back and low is the way to go if you want to be fast, you just need to make sure the alignment is good. If your not so sure about the alignment or if it's a rough track then I ...

Just what I thought. The original version had weight behind the rear axles. The axle was acting like a fulcrum (see saw) and all the weight was lifting the front wheels.

These guys got you covered.

Start reading, reading and reading and you to will become a Pinehead.

Were is the balance point? It sounds like there is too much weight in the rear end and the alignment is out. Did you align per stans procedure? We need more info.


Kurt