No announcement yet.

Acceleration Perspectives

  • Filter
  • Time
  • Show
Clear All
new posts

  • Acceleration Perspectives

    A lesson in acceleration
    * One Top Fuel dragster 500 cubic inch Hemi engine makes more
    horsepower than the first 4 rows at the Daytona 500.
    * Under full throttle, a Top Fuel dragster engine consumes 11/2 gallons
    of nitro methane per second; a fully loaded 747 consumes jet fuel at
    the same rate with 25% less energy being produced.
    * A stock Dodge 426 Hemi V8 engine cannot produce enough power to
    drive the dragster's supercharger.
    * With 3000 CFM of air being rammed in by the supercharger on
    overdrive, the fuel mixture is compressed into a near-solid form before
    Cylinders run on the verge of hydraulic lock at full throttle.
    * At the stoichiometric 1.7:1 air/fuel mixture for nitro methane the
    flame front temperature measures 7050 degrees F ( 3900 degrees C ).
    * Nitromethane burns yellow. The spectacular white flame seen above
    the stacks at night is raw burning hydrogen, dissociated from
    atmospheric water vapor by the searing exhaust gases.
    * Dual magnetos supply 44 amps to each spark plug. This is the output
    of an arc welder in each cylinder.
    * Spark plug electrodes are totally consumed during a pass. After 1/2
    way, the engine is dieseling from compression plus the glow of exhaust
    valves at 1400 degrees F. The engine can only be shut down by cutting
    the fuel flow.
    * If spark momentarily fails early in the run, unburned nitro builds
    up in the affected cylinders and then explodes with sufficient force
    to blow cylinder heads off the block in pieces or split the block in
    * In order to exceed 300 mph in 4.5 seconds dragsters must accelerate
    at an average of over 4G's. In order to reach 200 mph well before
    half-track, the launch acceleration approaches 8G's.
    * Dragsters reach over 300 miles per hour before you have completed
    reading this sentence.
    * Top Fuel Engines turn approximately 540 RPM's from light to light!

    This one confused Stan, but stop & ponder the fact that the engine is
    only used for apx 4 to 5 seconds.
    * Including the burnout the engine must only survive 900 revolutions
    under load.
    * The red-line is actually quite high at 9500 rpm.
    * The Bottom Line; Assuming all the equipment is paid off, the crew
    worked for free, and for once NOTHING BLOWS UP, each run costs an
    estimated $1,000.00 per second. The current Top Fuel dragster elapsed
    time record is 4.441 seconds for the quarter mile 10/05/03, Tony
    Shumacher). The top speed
    record is 333.00 mph (533 km/h) as measured over the last 66' of
    (09/28/03 Doug Kalitta).

    Putting all of this into perspective:
    You are riding the average $250,000 Honda MotoGP bike. Over a mile
    road, a Top Fuel dragster is staged and ready to launch down a
    quarter mile
    strip as you pass. You have the advantage of a flying start. You
    RC211V hard up through the gears and blast across the starting line
    past the dragster at an honest 200 mph (293 ft/sec). The tree'
    for both of you at that moment. The dragster launches and starts
    you. You keep your wrist cranked hard, but you hear an incredibly
    whine that sears your eardrums and within 3 seconds the dragster
    and passes you

    He beats you to the finish line, a quarter mile away from where you
    passed him. Think about it, from a standing start, the dragster had
    you 200 mph and not only caught, but nearly blasted you off the
    he passed you within a mere 1320 foot long race course.

    That, folks, is acceleration.

  • #2
    I want one!! :twisted: :twisted:


    • #3
      according to my calculations....the bike would cross the 400m mark in 4.474 seconds....
      or the true quater mile (about 402 metres) in 4.499
      so you'd finish at almost exactly the same time.....
      nice stats tho!

      imagine the acceleration of those jet cars (iirc they have a higher terminal speed than the top fuelers, but a higher E.T due to slow takeoff...)
      No amount of genius can overcome a preoccupation to detail.


      • #4
        Frickin Fast!!
        But, can that be used in court when the police have just nabbed you
        for "excessive acceleration" under the hoon laws?
        "I live my life a 1/4mile at a time"


        • #5
          right........ :roll:


          • #6
            now thats a bit of info i didnt know before reading that


            • #7
              HEHE, nice read!
              Top Fuelers are definitely the best to see at the drags. AS they drive past you ur vison goes blury and u think ur eardrums are going to explode
              I'd highly recommend to anyone who hasnt seen em to check it out at the plex. I think they have the top fuelers over to race twice a year.

              Down side of them though, after each 5 second run, they take the car back and strip the engine down and check everything which takes 2 hours. So for 2 runs in one night, it requires 4 hours of maintenece and thats if there isnt a problem....


              • #8
                The first time I ever saw a top fueller was awesome...

                the whole blurry vision and eardrum bursting excitement is cool

                And have you seen the dudes that race these? Watching the drag nights on Foxtel and you get dudes that can barely string a sentance together and are missing all but 2 of their teeth....scary :shock:

                Fat kids always win at see-saw


                • #9

                  Having had the pleasure of riding in Grant and Debbie O'Rouke's 2 seater Doorslammer as a present from one of my brothers, I can say that was awesome and recommend it to everyone. I is 150+Kg's and that things launch G's was enough for certaain bits of my anatomy to disappear for the rest of the night!!!

                  Ps On a side note, just got my CH3NO2 plates today

                  Any chemists amoung the crew??
                  If at first you don't succeed, Try Lemons


                  • #10

                    Elements: Carbon, Hydrogen, Nitrogen & Oxygen

                    So on the eight day, after wasting time faffing about with unimportant guff like heaven & earth & the waters & sky & creatures [& having a wee kip] & man.... God created PSB (GenesiSX-R1000)


                    • #11
                      mmmmmm. nitromethane....
                      lovely and expensive as hell.. and goes stale in about 40mins or something silly.
                      No amount of genius can overcome a preoccupation to detail.


                      • #12
                        Not a fan of drag racing, but you gotta respect a powerful [email protected]#$in engine!
                        Good read.
                        HONDA! F#@ YER!


                        • #13
                          interesting read
                          Some say he eats sidchrome for breakfast

                          Some say he only showers on even days of the week

                          Some say he put an R1 motor in a coffee machine

                          All we know is he's Hewie.