Here are the 6 cars that we have made so far for this years Pinewood Derby Season... They are all very consistent and the closest set of cars we have ever made... any one of them can beat the other with the exception of "Percy the Train" - although very fast... it is just running on heavier wheels than the others... We essentially swept our Pack races and are now on to Districts and hope to do well enough that we are able to run in the Qualified Scout Division at the www.midamericaderby.com - We have about 5 or 7 more cars to build for the Mid America Pinewood Derby 3 for the Mid America Stock Division and 2 for the Modified Division and possibly 2 for the Open Scout Division. The coolest thing is that the Kidos are really getting into all the steps and understanding of what goes into making an exceptional car... I hope all of you are having as much fun as we are this year building and racing cars... I am so grateful to all the knowledge and information that I have learned here and elsewhere over the last 3+ years... it is amazing how quickly you improve... it almost isnt fair at the Pack Level.
This was John's car... 1st in Den and 2nd Overall for Pack
Last Edit: Feb 8, 2013 23:11:26 GMT -6 by xanthrum
The Thomas Train is awesome. I remember the days when Sky Racing loved Thomas, I wish we would have built one for one of our scout races.
That being said, I (AKA Derby Evolution along with K-Racing ) would like to offer to pay the entry fee for Thomas to run in a League Race!!! While I do not know the wheel specs for the train, it appears that it may fit into the limited class. It would be great to see it on the track.
Derby Evolution would love to add this Derby Car to the web page as a featured car. If you would like to provide me with all the information on the train build such as if it was a kit, what wheels it was running, what axles it ran, how it was weighted, ect, I would like to feature it on the Derby Evolution website!
That is awesome... the Train "Percy the Tank Engine" might need some slight tuning to find a bit more speed... it ran 3.1022 on our 42' Best Track as it's best time... I currently am running on the following specs:
- Extended Wheel Base - Derby Evolution 91SRG's - Rail Rider - DD4H - Cheetah V1 - 2.2g Wheels - 3 1/2'' of Steer over 4 feet
The build process started with nothing more than a plank - upper 1/4'' of Grand Prix Pinewood Derby Kit... Drilled believe it our not - using the Derby Worx Pro Axle Jig - I used a Pin Vice - and slide a 7/64'' drill bit under one side - to negatively cant the rear axles. raised hole for non dfw and using a straight hole for the DFW - This was started before I got my new Proxon Drill Press
Then the Cab section of the Train was cut out of a solid block of Balsa, the boiler is a dowel - with a smaller dowel in the front - it rests on a curved piece of balsa against the cab, and another stip of balsa lying under the boiler with another curved piece of balsa holding up the front portion of the boiler... each dowel was completely hallowed out. the other pieces were constructed out of balsa to add details and design to fit how Percy looks. The Cab was then hallowed out - windows were cut in and a coal bin in the back (it actually has real "charcoal" in the coal bin) it is all expoxied in
I am attaching some additional pictures that we took in the build process... I think I can get this car to run close to 3.05 faster if we went to lighter wheels...
We went through the entire prep process... using Q tips - Novus #2 and then #1 - we used DD4H Red Rocket instead of Legends on the wheels - and burnished LOTS of graphite in using a combination of Grease Um, Max V, Hob E Lube, and DD4H Graphite.
We sanded axles with 1,000-thru-20,000 - then used Blue Magic Polish - lots of cleaning and inspection - and coated the Axle with Pledge and wiping them off with a microfiber cloth - leaving zero anything - lots more graphite when inserting axles into wheels...
The train weighed in at a very close to 2 oz's with wheels and axles, 3 oz's of tungstun was added -- almost all behind the rear axle in a weight pocket that was cut out on the bottom - I measured the COM but I can not recall exactly what it was... Not very aggressive that is for sure.
Tuned on my mirrored plexiglass and the first run on the track was at our pack pinewood derby... I hope this give you the information that you were looking for Steve. You certainly have my permission to show it on your site...