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Is this body too light??

Discussion in 'Ask The Pros' started by blkhunter01, May 3, 2020.

  1. blkhunter01

    blkhunter01 Pinewood Ninja

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    image.jpg DD4H sugar pine block
     
    Last edited: May 4, 2020
  2. blkhunter01

    blkhunter01 Pinewood Ninja

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    image.jpg EBAY body I got for reference
     
    Last edited: May 4, 2020
  3. blkhunter01

    blkhunter01 Pinewood Ninja

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    image.jpg My first attempt at ladder body still need to shape the front nose section to a point.
     
    Last edited: May 4, 2020
  4. blkhunter01

    blkhunter01 Pinewood Ninja

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    Loots of views no feedback, i need some advice!
     
  5. Cubscout Dad

    Cubscout Dad District Champion

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    Build them and run them, only way to see
     
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  6. Brian Stanley

    Brian Stanley Workshop Leader Pro Racer

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    You should be fine.
     
  7. Jimmy & his 2 Kids

    Jimmy & his 2 Kids National Contender

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    As long as a body isn’t flexible or prone to warping I don’t think there is such a thing as too light. But an appropriately cut and prepared body will likely be over 5 g, probably over 6. You’ll sand down the nose, but then you will have to add the ply over the weight pocket and if you are at 1/4” in thickness I would recommend a 1/64 ply brace along the axle cross piece for strength. One piece in one side makes a world of difference.
    Your body looks like a real nice start and you are certainly heading in the right direction. Nice work!
    Here’s an Awana block that I laddered and it’s ready for weight and final covering. I added balsa ribs and then cross bracing on the axle cross piece out of the same 64 ply that I cover weight with. That really stiffens it up.
    EB680701-1539-4912-80EC-DC4754A45B55.jpeg
     
  8. TRE

    TRE PWD Royalty Pro Race Winner Pro Racer

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    I go around 8 to 10 grams
     
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  9. Ballistic Racing

    Ballistic Racing Workshop Leader #1 Ranked in the USA Pro Race Winner Pro Racer

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    Two places I’d leave a little more meat on the chassis. Front axle & nose. Both of those places will be extremely thin by the time you finish shaping the nose.
     
  10. blkhunter01

    blkhunter01 Pinewood Ninja

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    Ok taken that into account and I drew out about body getting ready to cut it out as soon as amazon delivers my new scroll saw blades
     
  11. blkhunter01

    blkhunter01 Pinewood Ninja

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    image.jpg Redesign is done have a little bit of sanding to do to make it look nicer. Also you am unsure of how to profile the front? Any suggestions?
     
  12. Jimmy & his 2 Kids

    Jimmy & his 2 Kids National Contender

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    Looking good. Basically just a slow gradual taper to a point at the bottom front. With mine I start the taper just over the front axle. But you have to be careful not to cut into the strength of the axle cross piece. You can start just past the axle. I do it all on a belt sander.
    In pic top pic is a longer wheel base BASX body, bottom is an Awana body. (Yes I fill slot with glue to be safe)

    image.jpg
     
    Last edited: May 9, 2020
  13. Brian Stanley

    Brian Stanley Workshop Leader Pro Racer

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    Not sure if it makes a difference, but I always bring the bottom of the front up a bit on the sander as well. My feeling being this could prevent a cartwheel while slamming into a bad stop section.

    IMG_6725.png
     
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  14. Jimmy & his 2 Kids

    Jimmy & his 2 Kids National Contender

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    Here's another thought... and I hope one of the gurus chimes in here... Can that shape also cause a little "lift" making the front a wee bit more unstable? (meaning almost lighter going down the track with wind going under like an airfoil.)
     
  15. Charles Studer

    Charles Studer League Racer Pro Racer

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    Or does it shoot it faster like a missle or space shuttle fuel tank or an airplane fusilage......who knows. Test it jimmy
     
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  16. Brian Stanley

    Brian Stanley Workshop Leader Pro Racer

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    I borrowed (and when I say borrowed, I mean stole) the idea from HurriCrane. Our Scout Pack races on a pretty rough track, so I felt it was insurance against a car doing a gymnastics routine, and out of habit I've done it to my league cars as well.

    However, I agree with your thoughts. How could it not create a little lift. Is it enough to make any measurable difference? I have no idea, I'm certainly not fast enough for it to matter! :)
     
  17. T-Bone Racing

    T-Bone Racing Pinewood Ninja

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    Although I haven’t done this to any of my cars, I believe it makes a little difference, but I think if it’s sanded a little bit on the the bottom it could help, but that’s something to test, how much is too much, and how much is not enough.
     
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  18. Jimmy & his 2 Kids

    Jimmy & his 2 Kids National Contender

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    Um... no ... lol

     
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  19. blkhunter01

    blkhunter01 Pinewood Ninja

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    Dramatic explanation there jimmy
     
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  20. Jimmy & his 2 Kids

    Jimmy & his 2 Kids National Contender

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    Yeah it was a little overkill. That vid popped a couple weeks ago on my feed. It’s an older race. I remembered seeing that in the news. Mercedes has that issue 3 times that weekend.
    So then fast forward a couple weeks and see that pic and then CCR asking me to test it and couldn’t resist.
    I’ll say this... as far as league racing goes, just my opinion here, those races are on well maintained tracks. So the need for insurance isn’t there. I seem to remember Crane mentioning that too regarding when running on a rough track. On a rough scout pack track, sure I’d do it... any of the league tracks, no need. That’s a certainty. 3 main leagues running right now and neither John, Joel nor Terry would ever have a bad, old or “off” section on their tracks.
     
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