Search found 524 matches

by MaxV
Thu Sep 11, 2003 4:53 pm
Forum: Car & Semi-Truck Photos
Topic: My Family's Cars
Replies: 1
Views: 3141

My Family's Cars

My family's cars are posted at:

http://www.maximum-velocity.com/pinewoo ... esults.htm

I hope you enjoy them!
by MaxV
Thu Sep 11, 2003 4:50 pm
Forum: Car & Semi-Truck Construction
Topic: Passing Cars
Replies: 17
Views: 10599

Re: Passing Cars

The other cars do not gain momentum. Instead, your son's car either starts the flat section with less momentum, or it is slowing down faster than the other cars. The symptoms could be caused by any of the following. Less Momentum Momentum is mass times velocity. As TDean indicates, if the car's cent...
by MaxV
Mon Sep 08, 2003 9:05 am
Forum: Planning, Preps & Running the Race
Topic: Race Day - keep it moving and exciting
Replies: 3
Views: 3955

Re: Race Day - keep it moving and exciting

No one can create a wreck on purpose. Actually, you can create a wreck. We accidently 'discovered' this technique during the filming of our video, and liked it so much we included a few wrecks in the video. Here is how it is done: 1. Drilled axle holes (at least in the front). One of the front hole...
by MaxV
Fri Aug 29, 2003 10:11 am
Forum: Planning, Preps & Running the Race
Topic: Inspection - Lubricant limitations
Replies: 28
Views: 19115

Re: Inspection - Lubricant limitations

In our race, we just state that excess lubricant must be removed before check-in. So whether liquid is leaking out of the wheels, or the car is covered in graphite dust (this is more typical), the owner must clean off the excess first. By the way, when looking at our track it is obvious that the mai...
by MaxV
Thu Aug 28, 2003 4:38 pm
Forum: Car & Semi-Truck Construction
Topic: Speed impact of various types of lubrication
Replies: 34
Views: 15930

Re: Speed impact of various types of lubrication

Just to clarify, silicon will last much longer than 10 heats. In my tests, even after 20 heats it was still performing better than graphite. However, the effectiveness drops off a tiny bit with each run. So if you are in a race where others are using specialty lubes, I wouldn't recommend it if a win...
by MaxV
Thu Aug 28, 2003 4:18 pm
Forum: Car & Semi-Truck Construction
Topic: Speed impact of various types of lubrication
Replies: 34
Views: 15930

Re: Speed impact of various types of lubrication

Silicon would be used instead of graphite.

Technically it is not a dry lube, as it goes on wet. However, it you apply it per my earlier post, it will certainly not foul the track, and in fact will be much less messy than graphite.
by MaxV
Thu Aug 28, 2003 1:57 pm
Forum: Car & Semi-Truck Construction
Topic: Speed impact of various types of lubrication
Replies: 34
Views: 15930

Re: Speed impact of various types of lubrication

With silicon oil, there does not appear to be a break-in period, but it seems to wear off in an almost linear way. So, the best times occur right away, with a slower time at each subsequent run. For a race with few heats (less than 10), this would be okay. Another liquid lube I tested was just the o...
by MaxV
Thu Aug 28, 2003 11:57 am
Forum: Car & Semi-Truck Construction
Topic: Speed impact of various types of lubrication
Replies: 34
Views: 15930

Re: Speed impact of various types of lubrication

My tests indicate that - all other things being equal - a good thin film lube can outperform graphite by over a car length. As indicated, Gunk-brand silicon spray works well. I imagine the only real difference between this commercial brand and a medical brand is that the medical brand is sterile and...
by MaxV
Sat Aug 16, 2003 11:28 am
Forum: Other Vendors
Topic: Lead Weights
Replies: 2
Views: 2997

Re: Lead Weights

If you don't find the Prather lead weight locally, we have the weight at Maximum Velocity. http://www.maximum-velocity.com/segleadsmall.jpg We also have solid lead weight formed as a 3/8" wire, http://www.maximum-velocity.com/leadwiresmall.jpg and tungsten weights formed as cylinders, cubes, beads, ...
by MaxV
Mon Aug 11, 2003 6:27 pm
Forum: Maximum Velocity
Topic: Pro-Body Tool From Maximum Velocity
Replies: 3
Views: 3657

Pro-Body Tool From Maximum Velocity

Pro-Body Tool http://www.maximum-velocity.com/pro-bodysmall.jpg The Pro-Body Tool will improve the performance of pinewood derby cars by: Axle Slot Preparation - Ensuring accurate axle positioning by allowing you to drill accurate axle pilot holes into the existing axle slots with a hand drill. The...
by MaxV
Mon Aug 11, 2003 6:21 pm
Forum: Maximum Velocity
Topic: Pro-Axle Press From Maximum Velocity
Replies: 0
Views: 2882

Pro-Axle Press From Maximum Velocity

Pro-Axle Press http://www.maximum-velocity.com/pro-axlesmall.jpg The Pro-Axle Press will improve the performance of pinewood derby cars by performing three important procedures on nail type axles: Axle Straightening - Ensures accurate wheel tracking by creating absolutely straight axles. Axle Round...
by MaxV
Mon Aug 11, 2003 6:06 pm
Forum: Maximum Velocity
Topic: Pro-Hub Tool From Maximum Velocity
Replies: 4
Views: 3197

Pro-Hub Tool From Maximum Velocity

Pro-Hub Tool http://www.maximum-velocity.com/pro-hub-email.jpg The Pro-Hub Tool is a precision machined device that improves the performance of pinewood derby cars by performing three wheel preparation procedures: Hub Squaring - Ensures accurate rotation by squaring the wheel hub to the wheel bore ...
by MaxV
Mon Aug 11, 2003 5:38 pm
Forum: Car & Semi-Truck Construction
Topic: Inertial and Vibration Losses?
Replies: 37
Views: 22187

Re: Inertial and Vibration Losses?

On a smooth track, I don't believe the suspended weight will provide any benefit. In fact, it could detract, as some energy in the system will go into moving the suspended weight. However, on a rough track the suspended weight may help the car track better (won't get jolted around as much), just lik...
by MaxV
Mon Aug 11, 2003 9:45 am
Forum: Car & Semi-Truck Construction
Topic: A Hub-Axle Treatment Evaluation Protocol
Replies: 33
Views: 12322

Re: A Hub-Axle Treatment Evaluation Protocol

I completed a set of experiments over the summer which I will publishing in the Pinewood Derby Times newsletter over the course of the coming season. Not everyone will agree with the methodology I used, but I believe it provides reasonably accurate results while still being practical to implement. I...
by MaxV
Mon Aug 11, 2003 9:35 am
Forum: Commercial
Topic: BestTrack Review
Replies: 12
Views: 10320

Re: BestTrack Review

Regarding alignment on BestTrack, the pins do make it easy to align. It takes quite a bit of time and effort to get it put together the first time, but after that, it goes together quickly.