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+--- Thread: Pinewood Derby (/thread-8240.html)
Pinewood Derby - chicagokenji - 02-08-2008
http://www.lazardev.com/physics_of_pinewood_derby_cars.htm
Pinewood Derby - DAVEC-NITRO-RS4 - 02-08-2008
Some of his ideas skirt the rules, specifically, the ridged axles.
The sloped nose thing is in theory as starting line advantage, but in practice most gates drop so fast the cars all move forward at the same time.
Kenji, you guys racing PWD this year (or did already)?
Pinewood Derby - t to the maxx2 - 02-08-2008
Back in the day, we forgot we had the derby until the day of, we ended up painting the block yellow and calling it a school bus.
The next year we went all out with a sick car and it was the fastest in my club/whatever its called
Pinewood Derby - DAVEC-NITRO-RS4 - 02-08-2008
Pack
Pinewood Derby - hansarvin - 02-08-2008
It's kinda nice to know what my dad and I did wrong all those years haha. Here's pictures of all of mine. I never won much but they always looked better than everyone elses.
![[Image: 000_1198.jpg]](http://i138.photobucket.com/albums/q272/hyper7guy/000_1198.jpg)
![[Image: 000_1199.jpg]](http://i138.photobucket.com/albums/q272/hyper7guy/000_1199.jpg)
(Won best looking at District with this one)
![[Image: 000_1200.jpg]](http://i138.photobucket.com/albums/q272/hyper7guy/000_1200.jpg)
Pinewood Derby - DAVEC-NITRO-RS4 - 02-08-2008
I love the fat whitewalls on Road Hog!
Pinewood Derby - DAVEC-NITRO-RS4 - 02-08-2008
Longer wheelcase (when allowed) is another great way to make the cars more stable.
Pinewood Derby - hansarvin - 02-08-2008
Thanks dude my dad is a freaking perfectionist which is why they always looked so good. I wish I could do these things 1 more time now that I could build one by myself.
Pinewood Derby - BJoe - 02-09-2008
DAVEC-NITRO-RS4 Wrote:I love the fat whitewalls on Road Hog!
X2, kinda has a nostalgia look to it
Pinewood Derby - DAVEC-NITRO-RS4 - 02-09-2008
![[Image: car3.jpg]](http://i145.photobucket.com/albums/r210/davecnitrors4/car3.jpg)
![[Image: car6.jpg]](http://i145.photobucket.com/albums/r210/davecnitrors4/car6.jpg)
Two of the most important areas to reduce drag....where the wheel hub touches the wood block...notice how all surfaces of the wheel have been polished and waxed...all cars tend to rattle around on the track...so reducing wheel-to-track friction whenever possible makes them run slicker..make sure your wheels are true and the axles are level/square to the block, or the wheels try to walk in/out on the axle (does that make sense?)...
![[Image: wheel-bevel.jpg]](http://i145.photobucket.com/albums/r210/davecnitrors4/wheel-bevel.jpg)
and where the outside face of the wheel rubs under the "nail head".... there are usually little areas of flash from the process that forms the head on the nail...remove it and get it smooth as possible or it acts as a brake on the wheel...
![[Image: axle.jpg]](http://i145.photobucket.com/albums/r210/davecnitrors4/axle.jpg)
Pinewood Derby - Ponch - 02-09-2008
Do you guys have to use nails?
When I used to be into that stuff, we bought a straight axle kit and that kept things nice and square.
Pinewood Derby - Ponch - 02-09-2008
![[Image: 002-1.jpg]](http://img.photobucket.com/albums/v321/bluecivicguy/002-1.jpg)
Mine.
Was alot nicer, but since I got first with it, I decided to celebrate by ducttaping a rocket motor to it and flying it down the street
All I did was polish up the wheels and put graphite on the axles.
I almost got beat by some kid who stained the whole block of wood and put the wheels on it.
Good thing we didn't let him borrow the graphite like he was asking to-LOL
Pinewood Derby - motoxer4life - 02-10-2008
Ponch Wrote:
Mine.
Was alot nicer, but since I got first with it, I decided to celebrate by ducttaping a rocket motor to it and flying it down the street
I almost got beat by some kid who stained the whole block of wood and put the wheels on it.
Good thing we didn't let him borrow the graphite like he was asking to-LOL
haha we did the same thing w/ the xmods lol
Pinewood Derby - firesprink281 - 02-10-2008
i built some last year for a friend. lightning mcqueen, sally, and king from cars. ill have to see if he has pics of then.
Pinewood Derby - AddictedtoNITRO - 02-10-2008
firesprink281 Wrote:i built some last year for a friend. lightning mcqueen, sally, and king from cars. ill have to see if he has pics of then.
no mater? wtf man
Pinewood Derby - firesprink281 - 02-11-2008
he wanted to, but he would have been to tall
Pinewood Derby - slaytanic - 02-12-2008
No Mater? Man that F$#@in B%$#sh^t!!
Pinewood Derby - slaytanic - 02-12-2008
Sorry, my kid has the dvd in our van and that movie has been in there for like 6 months. Someone please shoot me!