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Raw Body cut out

Discussion in 'Pinewood Derby Pictures' started by BulldogRacing, Feb 26, 2014.

  1. BulldogRacing

    BulldogRacing PWD Royalty 5+ Pro Race Wins! Pro Racer

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    Here is the next car I started today. 5/16" Thick, drilled with silver bullet, tested on tuning table, routed out for tungston, 2 rows in rear of axle two in front+. DFW 1/16 shaved off body, I'll cover the bottom with Mono Coat. Weight came in at .48 ounces before fenders

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  2. Kinser Racing

    Kinser Racing ********************* 25+ Pro Race Wins! National Champion

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    Nice work!
     
  3. whitaker717

    whitaker717 Pinewood Ninja

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    OK, so I am slowly getting it. What are the routered out holes going up the middle for? Just to reduce the weight?
     
    Watchitgo likes this.
  4. Rocket car

    Rocket car PWD Royalty Pro Racer

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    Yes.
     
  5. GravityX

    GravityX PWD Royalty Pro Racer

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    Great job, looks good!
     
  6. DEW36

    DEW36 National Contender

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    Looks good!
     
  7. BulldogRacing

    BulldogRacing PWD Royalty 5+ Pro Race Wins! Pro Racer

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    Man I've learned so much. I started reading this forum about 8 weeks ago, I thought I had a lot of skills, last year I used the Pro body tool the axle bending tool, the old tuning method of marking each axle and turning all 3 to align. I we won our pack. I thought I was Pine wood king. Well, This year I found this site because I was looking to race in bigger ponds. I bought a bEST TRACK, (AFTER MUCH PLEADING WITH MY SWEET WIFE) So I tested a few cars I made this year against the car that smoked everyone last year, the new car won by 3+ car lengths! Thank you Pinewoodderbyonline, thank you DD4H, thank you to all the pros on here! I have found a hobby I love as much as my 3 little sons.
     
  8. BulldogRacing

    BulldogRacing PWD Royalty 5+ Pro Race Wins! Pro Racer

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    will my speed be much different by hollowing out the middle like this or would a solid body do the same thing at this point. I reduced the weight about .35 of an ounce bu routing out the middle.
     
  9. Kinser Racing

    Kinser Racing ********************* 25+ Pro Race Wins! National Champion

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    Some think it's faster and they could be right. I can get my car body's down to 9-10 grams without doing this. /images/boards/smilies/smile.gif
     
  10. resullivan

    resullivan Council Champion

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    Do you just make it really thin Kinser?
     
  11. Kinser Racing

    Kinser Racing ********************* 25+ Pro Race Wins! National Champion

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    I do get them thin but I try to keep them thick enough to still have some strength. When I'm done you can see light through the wood in the weight pockets. /images/boards/smilies/smile.gif
     
  12. resullivan

    resullivan Council Champion

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    So basically you just router out the weight pockets then go as thin as possible in the middle correct? I was seriously considering not cutting all the way through my next car, but then saw spacewalker's ladder car video.
     
  13. Kinser Racing

    Kinser Racing ********************* 25+ Pro Race Wins! National Champion

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    I go as thin as I can on the whole car. I only route out weight pockets though. /images/boards/smilies/smile.gif
     
  14. The Iceman

    The Iceman National Contender

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    Here is what I do but I'm Pretty new at this. Cut the car @ 1/4 inch, I cut all the way through it with a scroll saw then top it with 1/32 balsa. (This is my test car so it might look a little different, it's actually a wedge) but you get the Idea. This car without paint weighed .29, I'm thinking without wedge it would be .25 or 26. Look for ways to make it lighter!!
    As I sit here I know of a few ways already.
    1. reduce to one cross member
    2. reduce to no cross members?? I don't know how smart that would be. (some of these guys would know)
    3. change all the axles to be closer to the top or bottom and shave at an angle from the front to the back, probably save quite a bit!
    4. I use tightbond III, I know I could reduce the amount of glue if I try hard enough! (balsa glue??)
    5. The sides are 1/8 I'm thinking I should try 3/32. Again newb here so i don't know yet the minimum could be.
    6. maybe cut the whole frame so only 2/8 high, and make it into a wedge to allow the weights to stickup! (top the rails with balsa)

    Dang I should have done this before, I'm going in the garage to remake my test car!!!!

    Ice

    [​IMG]
     
  15. Kinser Racing

    Kinser Racing ********************* 25+ Pro Race Wins! National Champion

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    That looks good! There really is no right or wrong answer on this. It's mostly a matter of preference. /images/boards/smilies/thumb.gif
     
  16. resullivan

    resullivan Council Champion

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    This is what mine looked like. It didnt do very well sooo....

    [​IMG]
     
  17. The Iceman

    The Iceman National Contender

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    Is that topped with balsa or whats that one wood called Basswood? Or that mini plywood?

    Oh Great thanks a lot Resullivan! /images/boards/smilies/smile.gif Now I have to revamp my cars again!! I didn't think it could be sturdy enough with only a top skin on it!

    Thanks
    Ice
     
  18. Guest

    Guest Guest

    Kinser,

    What kind of wood are you using to get it that light without removing the innards?

    Sugar Pine?

    I have been thinking that pine is stronger pound for pound than bass. The grain might get in the way a bit for my style but... I will have to give some sugar pine a try.

    Hey fellas,
    Nice car bodies. One thing Resullivan,

    I try to leave a radius at the inside corners of things. It really adds to the strength.
     
  19. resullivan

    resullivan Council Champion

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    It is that birch plywood or whatever it is called. Great idea laserman. I think i will do that as well as add balsa wood in the middle for the next one.
     
  20. Kinser Racing

    Kinser Racing ********************* 25+ Pro Race Wins! National Champion

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    I use John's Sugar Pine Blocks. They're the best! /images/boards/smilies/thumb.gif
     

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