Search found 1141 matches

by Vitamin K
Mon Dec 23, 2013 6:55 am
Forum: Car & Semi-Truck Construction
Topic: Critique my wheel spin/wobble?
Replies: 21
Views: 3172

Re: Critique my wheel spin/wobble?

You intrigue me. Assuming that I have to run stock wheels and axles with no modifications other than polishing out irregularities, I'm not certain how many options I have at my disposal, though. Also think about how you might reduce the amount of play (difference in diameters) between the bore and a...
by Vitamin K
Sun Dec 22, 2013 10:18 pm
Forum: Car & Semi-Truck Construction
Topic: Critique my wheel spin/wobble?
Replies: 21
Views: 3172

Re: Critique my wheel spin/wobble?

I would prefer to see the spinning done with the car body "belly up" and level. That way, the gravity holds the wheel bores against the axles and tending toward the axle heads. The amount of play suggests typical BSA wheels and axles. Is the underside of the axle head cleaned up yet? It looked like...
by Vitamin K
Sun Dec 22, 2013 9:18 pm
Forum: Car & Semi-Truck Construction
Topic: Critique my wheel spin/wobble?
Replies: 21
Views: 3172

Re: Critique my wheel spin/wobble?

A different video would be better. If you could video the wheels while holding the car vertical and on each side while spinning the wheels it would be better. The way you were holding it allowed the wheel to go to the body and did not show how it would spin on the axle head. Something like this, pe...
by Vitamin K
Sun Dec 22, 2013 6:52 pm
Forum: Car & Semi-Truck Construction
Topic: Critique my wheel spin/wobble?
Replies: 21
Views: 3172

Critique my wheel spin/wobble?

So, I'm building cars with my kids and this is the first year that I'll be attempting to do some serious axle/wheel work on the cars. Gotta do a little better at Districts this time (if we make it!) So here's the base car (this one's mine -- once I get this where I want it, I'll be helping the kids ...
by Vitamin K
Fri Dec 20, 2013 12:01 pm
Forum: Car & Semi-Truck Construction
Topic: They handed out the car kits at tonight's Pack Meeting!
Replies: 23
Views: 2970

Re: They handed out the car kits at tonight's Pack Meeting!

I'm anticipating this years' derby season eagerly. I plan to obtain extra parts and build two cars for each kid...one that I build and the other that the child builds after watching me do it. Of course, I'll be assisting with the gnarly stuff like power tools and anything hazardous...but I really wa...
by Vitamin K
Wed Dec 18, 2013 8:47 pm
Forum: General Topics
Topic: Cover the car with Plastic
Replies: 7
Views: 2919

Re: Cover the car with Plastic

This is similar to how I plan to help my kids build cars for this year's Derby season. Wafer car base with a hollow CA-glue-reinforced balsa shell for looks.
by Vitamin K
Sat Nov 23, 2013 2:20 pm
Forum: Car & Semi-Truck Construction
Topic: Just ordered my first set of supplies for this year!
Replies: 5
Views: 1425

Re: Just ordered my first set of supplies for this year!

Keep us posted on the building progress. Sounds good! I'm especially interested in information working with balsa wood.

Speaking of Arduinos, I saw this advertised...good for a PWD sized project? http://www.femtoduino.com/" target="_blank
by Vitamin K
Wed Nov 20, 2013 5:33 pm
Forum: Car & Semi-Truck Photos
Topic: 2014 Season is approaching - Updated
Replies: 14
Views: 3884

Re: 2014 Season is approaching

dubldart340 wrote:The company I work for likes to have fun at work, so they asked me to set up a Pinewood race for the adults last week.
Man, I wish my employer would do something like that. :(
by Vitamin K
Wed Nov 13, 2013 8:30 pm
Forum: Car & Semi-Truck Photos
Topic: Wrecked PWD cars
Replies: 7
Views: 2806

Re: Wrecked PWD cars

At all the races I've been in (well, all two), the cars were staged by an adult volunteer. I did wonder, though, just what happens if somebody drops a car. There are some precautions that can be taken to minimize this risk (though there's always some). TXDerbyDad, was that car able to be fixed enoug...
by Vitamin K
Sun Nov 03, 2013 2:03 pm
Forum: Car & Semi-Truck Construction
Topic: First teardown and best way to get epoxy off tungsten??
Replies: 30
Views: 6690

Re: First teardown and best way to get epoxy off tungsten??

My impression has been that it is hard to get poisoned from lead unless you ingest (eat or inhale) it. Might you be able to elaborate on your child's circumstances? Certainly we want our kids to be safe, and perhaps there is a lesson here for the rest of us. Our daughter was tested at her one year ...
by Vitamin K
Fri Nov 01, 2013 6:51 am
Forum: Car & Semi-Truck Construction
Topic: First teardown and best way to get epoxy off tungsten??
Replies: 30
Views: 6690

Re: First teardown and best way to get epoxy off tungsten??

FWIW, the cost of tungsten is why I'm planning on running lead in my son's car for any pinewood races this scouting year. To me, a derby car represents a token of a lot of time invested between parent and child, and I am loathe to tear a car to pieces in order to reclaim some heavy metal from it. Ev...
by Vitamin K
Tue Oct 22, 2013 7:53 pm
Forum: General
Topic: Accurate testing on a shorter track?
Replies: 21
Views: 6782

Re: Accurate testing on a shorter track?

... - The main reason I made this thread was to answer the question of: "If Car A beats Car B on a 40 foot aluminum track, wlll Car A beat Car B on my homebuilt wooden 20-30 foot jobbie?" (And vice versa). Do you feel like you have received an answer? Yes, I think so. Though I'm open to more input ...
by Vitamin K
Tue Oct 22, 2013 5:53 am
Forum: General
Topic: Accurate testing on a shorter track?
Replies: 21
Views: 6782

Re: Accurate testing on a shorter track?

Just to clear up a few things: - I do intend to outfit our Pack's track with an electronic finish line before the next Pack Derby race. I've got the Arduino and parts in a nice little box on my desk. All I need is time, heh. My main goal for /that/ project is to assist in scoring though. Not certain...
by Vitamin K
Sat Oct 19, 2013 7:55 pm
Forum: General
Topic: Accurate testing on a shorter track?
Replies: 21
Views: 6782

Re: Accurate testing on a shorter track?

The thing of it is, I've seen winning cars that are a little behind at the bottom of the slope, but pull ahead as they make their way down the flat straightaway. Is this not common? My worry is that a shortened track won't accurately gauge the "coasting" performance of the car. :thinking: can I effe...
by Vitamin K
Fri Oct 18, 2013 12:36 pm
Forum: General
Topic: Accurate testing on a shorter track?
Replies: 21
Views: 6782

Accurate testing on a shorter track?

Okay, so I need so input from people who are smarter than myself. I'd like to build a test track to tune cars on, but finding appropriate straightaways isn't a trivial task indoors. I suppose I could set it up to be used outdoors, but since the ground isn't flat, I'd have to build some kind of level...