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Category: Science
Date: 12/30/12 08:55 AM

15 Responses to How Does A Top Fuel Dragsters Work?

  1. Profile photo of MisterG
    MisterG Male 30-39
    633 posts
    December 29, 2012 at 8:15 pm
    Link: How Does A Top Fuel Dragsters Work? - How does a top fuel dragster generate all its power and barrel down the 1,000-ft race track.
  2. Profile photo of tedgp
    tedgp Male 30-39
    3287 posts
    December 30, 2012 at 9:16 am
    decent video but they obviously didnt proof read a lot of the spelling in the captions or even the main title.
  3. Profile photo of Squrlz4Sale
    Squrlz4Sale Male 40-49
    6230 posts
    December 30, 2012 at 9:32 am
    Interesting stuff. For example: I had no idea that these cars are engineered so close to the physical limits that the engines virtually self-destruct every single run. Amazing.
  4. Profile photo of hairyshyt
    hairyshyt Male 30-39
    217 posts
    December 30, 2012 at 11:45 am
    $700 a tyre doesn`t seem that expensive unless it`s a mistake.
  5. Profile photo of carmium
    carmium Female 50-59
    6381 posts
    December 30, 2012 at 12:20 pm
    Why those aren`t tyres! They`re tires! They`re from America.
  6. Profile photo of ferdyfred
    ferdyfred Male 40-49
    13631 posts
    December 30, 2012 at 12:50 pm
    Excellent, love that stuff,
    tedgp
    wah shaddup you whiney bakewell tart
  7. Profile photo of Dad4Life
    Dad4Life Male 50-59
    2086 posts
    December 30, 2012 at 3:36 pm
    For 12 minutes or so, I was not bored.
  8. Profile photo of Angilion
    Angilion Male 40-49
    12387 posts
    December 30, 2012 at 4:35 pm
    That was an interesting simple overview. I`m off to look for answers to a few questions:

    Since the cars are at max revs for the whole of the very brief race, why are they using superchargers rather than turbochargers? The superchargers take 600hp away from the engine. Turbochargers wouldn`t, so there`s a 7.5% increase in effective power.

    Why use a fuel with a lower energy density?

    Why such a (relatively) low maximum engine speed? It`s possible to build engines that`ll rev past 20,000 rpm, especially if you`re not expecting them to last very long. If you`re willing to rebuild the engine every half a mile, you could probably go well past 20,000 rpm.

    I`m sure there are good reasons...although having thought about it a bit I`m not sure that it matters. They must already be close to the limit of what you can do with acceleration of a manned vehicle. 5G is close to passing out levels.
  9. Profile photo of Angilion
    Angilion Male 40-49
    12387 posts
    December 30, 2012 at 4:53 pm
    Looking for the answers led me to find out that this overview was *understating* how extreme the engines are. For example, the reason why they don`t use turbos is that the governing body has banned them...but the reason why they banned them is because it`s a bad idea to be throwing burning fuel at high velocity into fan blades moving at well over 1000mph, which is what you`d be doing if you ran these engines with a turbo.
  10. Profile photo of honkeylips
    honkeylips Male 30-39
    1586 posts
    December 30, 2012 at 6:31 pm
    You have to love a car that measures fuel consumption in gallons/second instead of miles/gallon.
  11. Profile photo of jeremyz23
    jeremyz23 Male 30-39
    3 posts
    December 30, 2012 at 7:42 pm
    Puts things into perspective after seeing the previous video in Afghanistan.
  12. Profile photo of thelonious
    thelonious Male 40-49
    3290 posts
    December 30, 2012 at 10:14 pm
    This is why we need more offshore drilling.
  13. Profile photo of BG77
    BG77 Male 30-39
    40 posts
    December 30, 2012 at 11:48 pm
    @Angilion The big advantage of nitromethane is that you can get a lot more power from each explosion inside the engine. Pound for pound, nitromethane is less energetic than gasoline, but you can burn a lot more nitromethane in a cylinder. The net result is more power per stroke. You typically need about 15 pounds of air to burn 1 pound of gasoline, whereas you need only 1.7 pounds of air to burn 1 pound of nitromethane. This means that, compared to gasoline, you can pump about 8 times more nitromethane into a cylinder of a given volume and still get complete combustion.
  14. Profile photo of McGovern1981
    McGovern1981 Male 30-39
    14268 posts
    December 31, 2012 at 7:14 am
    This is why we need more offshore drilling.

    It`s not oil based.
  15. Profile photo of thelonious
    thelonious Male 40-49
    3290 posts
    December 31, 2012 at 2:07 pm
    There`s more than oil offshore

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