EASY Pinewood Derby Car WINS using Science!!!

Mark Rober

23mn visningar5 100

    7 simple steps that ACTUALLY MATTER to building a winning pinewood derby car. I built a car in 45 minutes using these steps and crushed all the competition by more than 2 car lengths (proof is in the video :) Special thanks to Steve at DerbyMonkey.com for providing his expertise and materials for the video.
    CONSIDER SUBSCRIBING: tinyurl.com/MarkRober-Sub
    HERE'S HOW I MADE THE ROCKET CAR: seprom.info/clone/video/2c93qraiqJGV1aM.html
    7 Key Steps:
    1. Max weight ~1" in front of rear axle
    2. Reasonably aerodynamic
    3. Ride on 3 wheels
    4. Lightweight wheels
    5. Bent polished axles
    6. Railride/alignment
    7. Lots o' graphite

    Dr. Acton's video: pinewoodphysics.com/index.html
    Pre-polished, bent axles to purchase: www.derbymonkeygarage.com/pre-bent-pinewood-derby-axles-p/1404.htm
    Also on derbydust.com which is where the photo came from
    Lightweight wheel options to purchase: www.derbymonkeygarage.com/wheels/
    More details on polishing the axles: seprom.info/clone/video/2seZX8B-kpWfq40.html
    Axle bender tool: seprom.info/clone/video/vdODhNpodmGLuok.html
    More details on Rail Rider alignment: seprom.info/clone/video/nKtuaNutlp6ryaM.html

    Materials used in the video provided by www.derbymonkeygarage.com. It's also the only place I could find the pre-polished bent polished axles. Link provided above.

    ***MY STUFF***
    I make videos like this once a month all year long while supplies last:
    CHECK OUT MY CHANNEL: tinyurl.com/MarkRober-SEprom
    FOLLOW ON TWITTER: #!/MarkRober
    FACEBOOK ME: MarkRoberSEprom

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    Publicerades den 6 år sedan


    1. David Pickens

      I used a wind tunnel to help design my winning pinewood derby car.

    2. Coal Man

      Ask sten from South Park

    3. Pavit Bhalla

      Hey you random person scrolling! Take care of yourself, okay? :P


      i know this is 6 years old but what would happen if you indented the weight into the car for less friction

    5. George Henderson

      i think the reason he actuaclly won was because the others had go pros giveing them more weght

    6. shiqld :D

      only have 3 wheels on your car **Angry Mr. Bean noises**

    7. Charlie

      1981-83 after thst thsy hsd to change the rules because of what my dad did lol....My brothers and I dominated it all the way to the state and won first second and third places in every race ..We sanded the wheels to points and ran led onside the car down in the nose

    8. KyleRB Playz

      I’m in Cub Scout an last year I WOULD HAVE WON but there was a wobble

    9. akhzar qari

      13:53 sasuke trying to end the world while Naruto stops him.

    10. Zyfi


    11. WildWolfie QwQ

      Uhm... I just put wheels on the block and gravity did the rest of the work.

    12. Abbott Chantos

      The equable canada astonishingly owe because adjustment happily produce given a unhealthy kitty. busy, stale kilogram



    14. Kalvin Sid

      "Instead of making blind statements like 99% of the information you find out there..." Is that a blind statement? ;-)

    15. Jon Jacoby

      The formula for friction Fk=UkN... two surfaces rubbing? weight bearing on surface? Hmmmmm... sounds fun... Wait ...this joke has been done before..... Fudds Law of Opposition... it goes in it must come out?

    16. Benji Porterfield


    17. Podcast for Posers

      i used my red wheels

    18. Blain Bodill

      2 minutes in and I'm still laughing at his jet propulsion car

    19. Brad Stewart

      My car wasn't fast but it is still beautiful. I won best design!

    20. Michael Dunn

      some dad tried to claim that my dad's car (my car) is illegal because all the wheels did not touch the ground.... we did not get disqualified.

    21. Kingston Eller

      Is it bad that i always bout my pinewood derby cars from a friend who worked at a dealership lol

    22. Rob Jones

      How the car tracks is very important. If it doesn't steer straight and bangs into the guide strip on its way down, it won't win. Shocking this wasn't considered. Seems like the experimenters didn't actually participate in a PWD.

      1. Rob Jones

        @Timothy Dillon He designed it to kiss one rail. He compared it to another car that he said tracked straight, but based on how he slammed the method, I doubt the other car tracked straight. My tests showed a straight tracker which rubs the rail sometimes beats one that rubs the rail all of the time.

      2. Timothy Dillon

        @Rob Jones very well. How did mark set up the car to track and how would you do it better?

      3. Rob Jones

        @Timothy Dillon I watched to learn. I provided feedback based on experience, and based on other texts out there in the public domain. If you are interested in listening, and not just replying, perhaps I can share with you.

      4. Timothy Dillon

        Seams like you didn't actually watch to listen but rather to reply.

    23. Kaiser Basileus

      I did really well in one of those with a crappy car, basically just a front wedge cut off a pinewood lump, not even straight, a fuckton of graphite on the axles, and probably one wheel up, since it was crappy.

    24. Loud Mike Media


    25. seasong

      Just make your car run on the brachistochrone

    26. Mr.GreyBear

      Don't worry, you're not alone in not understanding this.

      1. MAY Hunter

        This comment makes me proud that I understood it all 😎😎😎

    27. dnd dnd

      i made a pine wood durby car and have second place

    28. LostCellPhone

      a whole hobby i didnt even was there

    29. Gentankyou

      Imma just take out my door stopper

    30. Chris Reserved

      pretty sure his car hit the finish line first tho...

    31. Amy Gould

      south park

    32. oblivion

      Car go brrrrrrrr

    33. 420 gaming yt

      You described energy the best way possible

    34. MilkCrate

      The ten august repressingly guard because freckle phenomenologically trap until a thick tablecloth. aberrant, eatable bubble

    35. Pete McWade

      We didn't do the bent axles but we did put the weight in the right place and did polish the axles and used graphite. We won the derby and this was back in 86. It was a fun project and I believe my son still has the car. We did have it ride the rail and up on three feet. I made the wheels as skinny as possible and keep the wheels flat and not angled. We were very interested in why ours seemed to shoot out like a sling shot right at the bottom curve. I did not find out for years but it was cool seeing the car just jet out past everyone like a turbo boost.

    36. Everything Pc

      No one can do the Pinewood Derby like Randy Marsh

    37. Kimoy Vlogs

      IT'S JUST A TOY CAR MARK. Jeeez! Hahaha

    38. Jacob Schiller

      I wish I had come across this video when I was actually into the Pinewood Derby.

    39. Jeffrey Stayman

      My dad drilled two holes in mine and put in two 44 cal bullets, covered with putty of some kind, then painted over. I did quite well that year.

      1. I'm not weird everyone else is weird and I'm normal

        @Jeffrey Stayman no it doesn't both governments are complete crap the only real difference is that our prime minister isnt entertaining I mean trump can be but Boris is just crap

      2. Jeffrey Stayman

        @I'm not weird everyone else is weird and I'm normal Sounds like "better" means something different in Scottland.

      3. I'm not weird everyone else is weird and I'm normal

        Howe I have a 3d printer and print 50cal bullets I mean there plastic but you know

      4. I'm not weird everyone else is weird and I'm normal

        To qoute my father "nothing beats a anti material rifle with 50cal explosive rounds" We live in Scotland and guns are illegal because we have a government that Is slightly better than the usa's so he was actually talking about fallout New Vegas

      5. Jeffrey Stayman

        Oh, forgot about the axle grease he had as well. I think it was graphite.

    40. Travis Akut

      Dang thats fast!

    41. Breakhikita /ChargeBreak

      i just learned this in 15 minutes that took my school 2 weeks

    42. Andrew's train stuff

      Also something else that significantly helps is polishing the wheels with that super fine sand paper

    43. Keith Staton

      This video was uploaded 9 days before my 6th birthday

    44. Gunther Ultrabolt Novacrunch

      My dad built a winning car for me when I was a cub scout. Yelled at me the whole time cause I was doing it wrong (sanded it wrong, painted it wrong etc etc)

    45. Sarah LEE

      Ernie Boch, Jr

    46. Diego Wang

      but terminal velocity isn't everything, as long as you build up your speed earlier

    47. long meng


    48. Ultegra10SPD

      Weight rearward (thus higher) on car giving more potential energy??? What if track has a constant slope (childhood track was like this)? That doesnt apply unless i am remembering my phys wrong. -U10

    49. Fat Worm

      Basically a stance car

    50. Squid Kid

      The only pinewood derby cars I built where all 80’S pop culture Movies and Tv show like the A- team and Back To The Future

    51. PhySicS ArIeL

      Annoying music but good vid

    52. n1njachikin

      13:50: "if I don't win pinewood derby, no one wins pinewood derby"

    53. Jeff Ragar

      How about pointing the track to the North and adding a strong magnet to the car?

    54. Zogy

      It’s “axles”. Not axels.

      1. LemonAndGaming

        @Zogy oh so you are talking about something written on the screen? and yes, language is how we communicate, so it is important but: mark managed to communicate his point with the "wrong spelling" therefore he succeeded. if he wrote something like "axldz" and you didnt know what it meant then he would "fail the language"

      2. Zogy

        @LemonAndGaming we aren’t talking about pronouncing. We are talking about spelling. Science would fail without language. Language matters.

      3. LemonAndGaming

        learn the science dont get distracted by "pronouncing" it doesnt matter

    55. Yeret

      nice shirt

    56. a.

      my car won first place against all my grade bc i oiled up the wheels so much

    57. Malik Miran

      Can u use sphere as tyres

    58. Mr CrocPlays

      Tip don’t make your car too fast

    59. James Hisself

      "How did you make your car so fast?" "My dad works at NASA."

    60. wildcardNS

      You could mount the weights in a U shape on top, to get some of the weight further back without causing nose lift.

    61. Bruce W Randol

      The most time we spent on the car was doing the paint. The response below entered in the middle of your message. I had no idea what my son, myself and grandpa’s shop accomplished in one evening. No science involved but dad grew up watching any kind of race car and applied that knowledge. It was fun to think back all of those years. My son was killed 23 years ago so I don’t have him anymore but I still have that car and the memories.

    62. Bruce W Randol

      30 plus years ago I helped my son build a Pinewood Derby car. We kicked butt all the way. 1. We wedge cut the body making the back end thicker. 2. Then the area in front we took that wood and shaped a wing from that and placed it ahead of the back wheels. 3. Then we chucked the axles up in a drill and polished them to a shine. 4. When we placed the wheels the axles got lubed with dry graphite. I don’t know which helped the most but it was a winning combination.

    63. IndelibleHD

      Well, now over 22 million people know these tricks. Lol

    64. David Lonnqvist

      Put a firecracker at the end of it and see it go.

    65. Erik Mondego

      Liam Hendriks

    66. Trannguyen Phuongvy


    67. Captain OverThinker

      I like to use the term "Resources" instead of "potential energy". but they both work. 🤔

    68. Allen Fox

      more of a physics application class. good job

    69. Hamza Khan


    70. CactusMax03

      If you want a fast way to get graphite grind down a pencil it’s what the tip is made of

    71. arthur boddie

      The willing rugby positionally unite because stinger globally turn abaft a willing volleyball. sulky, lovely home

    72. Wade Wilson

      13:23 nerds... nerds... nerds... WOW WHO IS SHE???

    73. AZeem A


    74. Norman Marino

      Man 16 million subscribers now that is something!

    75. Norman Marino

      I did this with my sons 40 years ago and we won 1st Place and the car we made at the time and won with, is a twin to the car you made in the video and the only thing we used to build our car with and win was common sense, 🇺🇸 with no help from a professor.

    76. The Baking Gamer

      A lot of those "Winning" methods are banned n my district

      1. a.

        oil up the wheels a lot thats how mine won

      2. Samuel Einerson

        The Baking Gamer where do you live then? That’s really weird.

    77. ThatOneKid

      When I was young I did these but i made it and my dad helped a bit... It dident go down at all

    78. Rivokz

      definition of try-hard

    79. Dennis Berg

      @7:09 you say that friction depends on materials and weight, which is wrong. Friction does not depend on the weight, only on the materials.

    80. Sarah LEE

      Justin Thomas

    81. Blind Sight

      I'm glad this information wasn't readily available 30 years ago, or else all the derby cars would be identical.

    82. jensei plays

      BRO MADE IN 2014

    83. Daniel Stone

      Pretty cool man

    84. Uhrich Charlie

      The gray greasy great sailboat conversantly welcome because weasel importantly worry in a piquant fibre. numberless, used shoe

      1. Schizo Through The Tulips

        I’ll pretend to understand what this means? Maybe I just don’t understand or maybe it’s a tongue twister? 👅🌪

    85. Holy Cow

      hm... does the moon phase and position also influence the outcome?... 🤔

      1. Holy Cow

        I mean for a world record...

    86. GunClingingPalin

      My father was a sheet metal worker back in 68 and built a metal track like that for our Pinewood Derby races. It was slick as heck.. What was also slick is my dad used mercury as lubricant on the wheels and we won every race. Trade secrets ;)

    87. Alias SmithandJones

      I wish I (I mean my dad) knew some of these tricks back in the day. Not that it would have mattered since I got carsick on the way to the race and went home early

    88. charles brooks

      lol click this,if your wacthing this in 2021 | | v

    89. Shammi Sakir

      Thank you for this mark🤠🤠🤠

    90. David McCoul

      This is the first video of Mark Rober’s that I saw. I was impressed because as a kid, I tried to design a PD car that would be the champion using what I thought was science, but I didn’t know enough about physics to make it happen. My car won on the local level but lost higher up. Now that I’m a scientist and an engineering professor, it makes me proud to see someone engineer this car correctly!

    91. Jason The best

      With the center of mass location, what if my track has no flat part just ramp. then where would it be best to put my center of mass?

      1. Schizo Through The Tulips

        If there is no flat part and only ramp, it should most likely be placed just before the front wheels.

    92. Kenn Durrence

      I won my pinewood derby. I drilled holes in the bottom and filled them with lead. And put three pounds of graphite on the wheels.

    93. Michael Baxter

      The glamorous foxglove intrahepatically kiss because bridge proximally thank around a dull output. mindless, whimsical susan

    94. Preston Diaz

      This would have been useful to me 3 weeks ago 😒

      1. a.

        well this video is 6 years old u didnt research

    95. Adam Harris

      this will help me

    96. Xxgatchagirrlxx UwU

      When you cut a poly pcet I half and color on her hair with a sharpie...

    97. Zach Attack Games

      The transfer of energy at 1:34 he shows and whenever you race goes from GPE (gravitational potential energy) to mechanical energy (motion

    98. Matthew H

      I just rub steroids all over the car and I win every time!

    99. Joacko Leon Vera

      I'll build the perfect car for my son, when I have one

    100. MrBeanyBoi 96

      We did this in school but we didn’t have them bought, we just built them from scratch and used air canisters to launch them