Low-Rider GT
Low-Rider GT
Low-Rider GT
Low-Rider GT

Pinewood Derby Times
Volume 15, Issue 9
January 27, 2016

In this Edition:

- Editor's Notes

- Feature Article - Shifted Wheelbase with Outlaw Wheels

- Humor

- Product Showcase - Max-V-Lube - 50% off

- Pinewood Derby Car Showcase

- Memory - The Spongy Car

- Q&A



Editor's Notes

2nd Quality Blocks
As we package up our MV car kits, we find quite a few blocks with chipped edges and other minor flaws such that we don't want to include them in a kit. If you are interested in purchasing some of these 2nd Quality Blocks please contact us at 623-587-9261. The minimum order is 40 blocks, and the price is $1.00 per block plus shipping. We have both slotted and plain blocks.

Can We Help?
If we can help you in any way with your pinewood derby project, or if you have any feedback regarding this newsletter, please contact us at: info@maximum-velocity.com
MV Basic & Wedge Car Kits

If you are planning a race and are not required to use a specific kit type, our MV Basic or Wedge Car Kit are just what you need. These attractively priced kits are equipped with:
  • Quality Block - Unlike the blocks provided by some organizations, our blocks are soft, northwestern pine blocks, cut precisely to 7 inches long, 1-3/4 inches wide, and 1-1/4 inches tall. These dimensions, as well as the axle slots accurately duplicate the dimensions of standard pinewood derby blocks from BSA and PineCar.

  • Simple Axle Preparation - Don't worry about filing off flaws, or losing hub caps. Our Speed Axles have no burrs or crimp marks, and install without hub caps. With or without polishing, they are ready to go. We supply five, so you have a spare.

  • Quality Wheels - Forget cheap, out of round wheels. Our MV wheels are top-quality wheels. You will not be disappointed with the quality of these wheels.

So, if your organization does not mandate a particular kit type, consider our MV Basic Car Kits or MV Wedge Car Kits


Feature Article

Shifted Wheelbase with Outlaw Wheels
By Randy Davis

Last season I published an article entitled, Shifting the Wheelbase. In that article, the effect of shifting the standard wheelbase back by 1/4 inch was tested. The shift was accomplished as follows (quote from the original article):

"The body of the test car was shortened by 1/4 inch, and then a thin slot was cut crosswise on both the front and back of the car. A piece of styrene was cut such that when installed into one of the slots, the car measures seven inches long. By moving the styrene between the front and back of the car, the wheelbase is shifted by 1/4 inch without changing any other factor on the car."



Figure 1 - Test Car
(Note the styrene piece at the back of the car in the first photo, and the front of the car in the second photo)

The result of the experiment was a 3ms improvement. Although any improvement is certainly welcome, my expectation was for a larger improvement. So at the end of that article, I suggested that switching to outlaw-type wheels would reduce some frictional losses and possibly amplify the benefit of the shifted wheelbase.

New Experiment Setup
The new experiment was set up identical to the first experiment except for the following:
  1. Outlaw wheels and nickel speed axles were used instead of Pro-Stock Wheels and zinc-plated speed axles.

  2. Additional tungsten putty was added into a hole in the bottom of the car to account for the reduction in wheel weight.

As before, five heats were run with the styrene piece at the back of the car (standard wheelbase), then ten heats were run with the styrene piece at the front of the car (shifted wheelbase). Finally, five heats were run with the styrene piece at the back to even out the heats to ten in each position.

Results
Surprisingly (at least to me), the results of the second experiment were nearly identical to the first experiment.

    Standard Wheelbase Average - 2.477 sec; Std. Deviation - .0011     Shifted Wheelbase Average - 2.474 sec; Std. Deviation - .0019

Conclusion
Thus, I have to conclude that shifting the wheelbase back by 1/4 inch, with all other factors equal, provides a 3 ms (approximately) improvement on a 32 foot aluminum Freedom Track.



Humor

A mother and her young son returned from the grocery store and began putting away the groceries. The boy opened the box of animal crackers and spread them all over the table.

"What are you doing?" his mother asked.

"You can't eat them if the seal is broken" the boy explained, "I'm looking for the seal."



Product Showcase

  Max-V-Lube  
50% off

Max-V-Lube is a proprietary blend of high-purity, natural flake dry graphite, which offers superior performance for pinewood derby cars.

After extensive testing against other brands of graphite, we are offering Max-V-Lube as our premier graphite for pinewood derby performance.

Through February 9, 2016, you can get 50% off a bottle of Max-V-Lube. To take advantage of this limited time offer, Add part 5104 to your shopping cart, then use coupon code JAN27NL during checkout.

Important Notes:
(1) The coupon code must be entered in UPPERCASE.
(2) Apply the coupon code after all items are in the cart. If the shopping cart content is changed after the coupon is entered, the coupon code may need to be re-applied before pressing the "Proceed to Checkout" button.



Car Showcase

Today's showcase cars are from Andy Holzer, master pinewood derby car builder.

1939 Chevy Sedan Delivery


In 2015 we held a car club Pinewood Derby. The car club is called the Sedan Deliveries. One of the design awards was an award for the best sedan delivery model. So I decided to make one for the race. The club logo includes a 1939 Chevy sedan delivery.



This is a large car; the glue up of this car was two blocks glued on top of each other. It was a lot of work getting a fat fendered car looking like it should. The headlights were made out of dowels stuck into the chuck of my drill press and sanded into shape. During the sanding process, the headlights were fitted and glued to the body.

While the sedan delivery was being clear coated, the clear coat reacted with the paint and we had some trouble. The clear was allowed to dry and was wet sanded to get the paint flat again, then it was re-cleared.

The sedan delivery won the "Best Sedan Delivery" trophy. It also was 3rd place for speed in the Stock Pinewood Derby class and 3rd place for speed in the Real Street class.

1939 Chevy Sedan


Once I had the plan for the Sedan Delivery completed, I figured it wouldn't take much time to make a 1939 Chevy Sedan. My neighbor, and fellow Sedan Deliveries member, has a '39 Chevy street rod, so I figured that it wouldn't take much to modify the plan to a sedan. The modification to a sedan was actually quite easy; I hoped the build would be that easy. I started the same as the delivery - two blocks glued together, cut out the wheel wells, and glued the sides on.

About this time I realized that making two fat fendered, shapely cars was a lot of work. On the sedan I reshaped the hood twice and in the process I made the nose too rounded. Then I needed to build the front and rear lights for the sedan. After priming I realized the roof was too square and the hood sides were still not right - more reshaping.

The '39 Chevy came in 4th in speed in the Real Street class.

Eleanor, from the 2000 movie "Gone in 60 Seconds"


A friend of mine has a real Eleanor, a modified 1967 Shelby GT-500. If I remember the story right, his car was number 17 of 18 cars made for the movie. His was one that they did not complete because it was not needed to finish the movie. When he purchased the car it was a painted body; it did not have a motor, driveline or suspension in it. When he got it he had a fabrication shop install a 5.0 Coyote motor from a wrecked 2013 Mustang. I built this car for my friend.

Eleanor only raced in the Real Street class, it took 1st place for speed and won the "Most Resembling a Car" trophy. Fast and pretty, that is how I like them - pinewood derby cars, that is.

1971 Javelin / AMX


I also decided to build a 1971 Penske Racing, Mark Donohue Javelin/AMX. This is the same car that won the 1971 SCCA Trans-Am championship, with seven wins out of ten events.

In the summer of 2014 when we were in Kenosha for an AMC homecoming, we saw some guys unloading their replica of the #6 Donohue car. Noah just happened to be wearing his T-shirt of the #6 Javelin. The owner asked him if he wanted to take his shoes off and sit in the car. The owner even let him start the car.

Last year I built a Javelin and three other cars for the 2015 Cub Scout recruitment campaign (the Javelin is the red car with the white T stripe).



The Javelin/AMX did not race as well as the original. In the Real Street class it came in 9th for speed out of 15 entrants.

1970 Rebel Machine


My 16 year old son, who has been a Boy Scout for 5 years, still enjoys making Pinewood Derby cars every year. In 2015 he decided to build the American Motors 70 Rebel Machine. It seems odd that a boy - who was not alive when American Motors Corporation was still in business - would decide to build a car from a 27 year defunct company.

We have a 1966 Marlin and in the summer of 2014 Noah went along with me and my dad to the Kenosha homecoming. Kenosha, Wisconsin is the place where AMCs were built from their inception back in 1954 up until the end in 1988. At this show there were all kinds of AMC, Nash, and Hudson cars. Noah thought the Rebel Machine and the SC Rambler were very cool in red, white and blue livery.

The Rebel Machine took 8th place in the stock class (out of 15 cars) and 5th place in the Real Street class (8 cars). We may have to play with it some more before we race this one again.

Share Your Car With Our Readers

Do you have a car you would like to "show off" to our readers? If so, send us a photo of your car along with a brief description of any special features. Please include your full name. If selected, we will include the photo and description in this newsletter. Please e-mail photos to:
info@maximum-velocity.com.

Photos must be sent by e-mail in JPG format (minimum size of 640x480, maximum size of 1280 x 960). Please shoot photos from the front left of the car, similar to the orientation of this car:


For better focus, keep the camera four or five feet away from the car, and then use the camera's zoom to fill the frame with the car. Also, use a solid (preferably white) background for the photo.

Send only one photo per car, unless an additional photo is needed to adequately show a feature. Also, only one car per subscriber per year please. Thanks!



Pinewood Derby Memory

The Spongy Car

We had our pinewood derby a few weeks ago. My kids and I built three cars, two for the open class (Michelle, 10 years and Johnny, 4 years) and one for my 6 year-old son (Alex) who is in scouts. It was the night before the weigh-in and everything was going great. We rated the wheels and placed the best set on Alex's car, and the worst on Johnny's. We then polished, aligned, lubricated, etc. The cars were looking great.

Then disaster struck. The only way that I can describe it is that the wheel slots on Alex's car melted apart. When Alex had painted his car, he put on so much primer and paint that the car had a spongy feel (it still is that way!). The wheels fell off and the axle slots were ruined. This was about 5 hours before the official weigh-in and we did not have time to build another car. So, using epoxy, we glued the wheels on as straight as we could. We then went to the weigh-in and were set for the race.

On race day, I was the judge that monitored the cars and kept them from being modified before the race (I also was the one who carried them to the starting line). When putting out the cars, I noticed that the wheels on Alex's car were very much mis-aligned. It must have been bounced around after check-in. But since all of the cars were registered, there was nothing we could do. Alex was very disappointed to find out that his car placed almost dead-last. The wheels were so out of alignment that while the car was fast for the first few feet, it did not have the staying power to finish the race. It would run in first place for the first few feet and then lose out in the end. The one bright spot in the otherwise sad day for Alex was that he won the prize for the sportiest looking car.

Then came the open division. Michelle's car finished 9th or 10th, and took first in the unique design category. Johnny's car (which had the worst wheels and the least attention to alignment), finished 5th. His car did not lose a race until the final two races.

It just goes to show that you can never really predict what will happen when you race in the pinewood derby.

Brian Stanek
Indianapolis, IN

Share Your Pinewood Derby Memory!
If you have a pinewood derby story that is funny, unusual, sad, heart- warming, etc., please E-mail it to me.

Don't worry about literary polish. We will edit as needed. If your memory is used, you will receive a $10 coupon in May of 2016.

Also, please read our Submission Policy



Q&A

My boys have been using the wedge design and other tools from your site for over six years and we've had great success, winning or being in the finals each year. I'm wondering if, instead of the lead, the wedge (basic wedge) can use tungsten? Installing and shaping the lead has always been the most challenging part for us.

If you are using an extended wheelbase version of the wedge, then tungsten would be best.

If you are using a standard wheelbase version of the wedge, then you can use tungsten, but you just have to be careful to not overload the back. You would want to have a target balance point, then slip the weights in without glue, temporarily mount the wheels and axles, and check the balance point. Adjust the weights until the desired balance point is achieved, and glue them in place. Make sure to leave the car a little light, and add the final weight at the weigh-in.

I would like to try racing in a league race. I will have to send in my car a couple of weeks early because we are driving to Florida. Should I try to use oil - I have not tried it before?

I don't recommend lubing with Krytox 100 more than one week before the race. It may be okay, but it would safer to use graphite with that amount of lead time.

I am going to be using your propeller car kit for an upcoming outlaw race. What is the ideal weight for a propeller car on a standard length aluminum track?

Generally you want the car to be as light as possible. Since it is under power, it will continue to accelerate for the entire run, and the lighter the car, the greater the acceleration. Of course, at some point it could be too light and fly off the track. But with the parts in the kit, that doesn't happen (at least, not that I am aware of).

Do You Have Questions that Need Answers?
Do you have a pinewood derby-related question? If so, send your question to: info.maximum-velocity@com. We answer all questions by e-mail, but not every question will appear in the Q&A section of the newsletter.



Back Issues

Are you a new subscriber, or have you missed some of the previous newsletters? Don't miss out! All of the issues for Volume 5 through Volume 15 are posted on our web site and can be found using our Newsletter Index.

Issues from Volumes 1 to 4 are available in four formatted documents, ready for immediate download. To find out more, Click Here.




Newsletter Contributions

We welcome your contributions! If you would like to contribute an article, a web site review, or a speed tip, please send it to: info@maximum-velocity.com.

Please read our submission policy.



Subscription Information

The Pinewood Derby Times is a free e-newsletter focused on the Pinewood Derby. It is published biweekly from October through March.

Please Forward This Issue to a Friend

If you haven't already done so, feel free to forward this issue to your pinewood derby friends. But please don't subscribe your friends. Let them decide for themselves. Thanks.

Sign Up

If this newsletter was forwarded to you, why not subscribe to receive this newsletter. It is absolutely FREE and your e-mail address is safe, as we never sell or share our distribution list.

To subscribe, enter your e-mail address below and press 'Subscribe'. You will be sent a confirmation e-mail. Reply to the e-mail to complete the subscription.
Type Your E-mail Address




Randy Davis, Editor, Pinewood Derby Times
E-Mail: info@maximum-velocity.com

Copyright ©2016, Maximum Velocity!. All rights reserved. Please do not reprint or place this newsletter on your web site without explicit permission. However, if you like this newsletter we grant permission, and encourage you to e-mail it to a friend.

Maximum Velocity disclaims any personal loss or liability caused by utilization of any information presented in this newsletter.

The Pinewood Derby Times is not specific to, and is not affiliated with the Boy Scouts, YMCA, Awana, or any other organization .

®Maximum Velocity! is a registered trademark of Maximum Velocity, Inc.

®Pinewood Derby, Regatta, and Space Derby are registered trademarks of Boys Scouts of America.

®Awana is a trademark of Awana Clubs International.

All other names are trademarks of their respective owners.

Mailing list services are provided by: www.mail-list.com

Pinewood Derby Banner