DEFINITION OF ACCELERATION
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  1. #1
    Charter Member
    us
    WolfPack member

    Aug 2009
    New Hampshire
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    The Truth

    DEFINITION OF ACCELERATION

    There are no rockets or airplanes built by any government in the world that can accelerate from a standing start as fast as a Top Fuel Dragster or Funny Car!
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    DEFINITION OF ACCELERATION


    One top fuel dragster 500 cubic inch Hemi engine makes more horsepower
    than the first 4 rows of stock cars at the Daytona 500.

    It takes just 15/100ths of a second for all 6,000+ horsepower of an NHRA Top Fuel dragster engine
    to reach the rear wheels.

    Under full throttle, a dragster engine consumes 1-1/2 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 Hemi V8 engine cannot produce enough power to drive the dragster's supercharger.

    With 3,000 CFM of air being rammed in by the supercharger on overdrive, the fuel mixture is compressed into a near-solid form before ignition. Cylinders run on the verge of hydraulic lock at full throttle.

    At the stoichiometric (stoichiometry: methodology and technology by which quantities of reactants and
    products in chemical reactions are determined) 1.7:1 air/fuel mixture of nitro methane,
    the flame front temperature measures 7,050 deg F.

    Nitro methane 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 halfway, the engine is dieseling from compression, plus the glow of exhaust valves at 1,400 deg 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 half.

    In order to exceed 300 mph in 4.5 seconds, dragsters must accelerate 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 revolutions from light to light! Including the burnout, the engine must only survive 900 revolutions under load. The redline is actually quite high at 9,500 rpm.

    Assuming all the equipment is paid off, the crew worked for free, and for once NOTHING BLOWS UP,
    each run costs an estimate $1,000.00 per second.

    The current top fuel dragster elapsed time record is 4.428 seconds for the quarter mile (11/12/06, Tony Schumacher, at Pomona, CA). The top speed record is 336.15 mph as measured over the last 66' of the run (05/25/05 Tony Schumacher, at Hebron, OH ).


    Putting all of this into perspective:

    You are driving the average $140,000 Lingenfelter 'twin-turbo' powered Corvette Z06. Over a mile up the 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 run the 'Vette hard up through the gears and blast across the starting line and pass the dragster at an honest 200 mph. The 'tree' goes green for both of you at that moment.

    The dragster launches and starts after you. You keep your foot down hard, but you hear an incredibly brutal whine that sears your eardrums and within 3 seconds, the dragster catches and passes you. He beats you to the finish line, a quarter mile away from where you just passed him.

    Think about it, from a standing start, the dragster had spotted you 200 mph and not only caught, but nearly blasted you off the road when he passed you within a mere 1,320 foot long race course.

    ...... and that my friend, is ACCELERATION!
    worldtalker likes this.

  2. #2
    us
    May 2009
    Mercer county, Pa
    Whites, XLT & V3i, TRX Pointer
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    All Types Of Treasure Hunting
    Thanks, that was a very interesting article, I am a fan of Top Fuel dragsters, but that really put it into perspective. A friend of mine at work is into drag racing, his dad runs a Mopar Pro Stock, western NY area.
    I printed out your article for him, he will enjoy it.

  3. #3
    Charter Member
    us
    WolfPack member

    Aug 2009
    New Hampshire
    Garret Master hunter Cx Plus
    12,824
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    The Truth
    No problem GPS53 glad you enjoyed it

  4. #4
    us
    onfire

    Nov 2004
    Wisconsin
    250 2500
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    All Types Of Treasure Hunting
    won't it be fun! The sights and sounds of a AAAAAAAAA electric Dragster.... NOT "I love the smell of Nitro in the morning"
    austin likes this.

  5. #5
    us
    Jul 2012
    San Antonio, Texas
    Garrett 250
    5,361
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    Research/Limited field work
    Current Top Fuel e.t. is 3.701/NHRA record set by Antron Brown this year. Funny car e.t. is 3.986 set by Jack Beckman. Keith Black used to build the Hemi engines, don't know who does now, but Dodge doesn't, I don't think. In the early to mid 70's my last build was a D Gas rail. Front engined, small block Chevy. John Lingenfelter was dabbling with old chevy powerglide two speed automatics and we phoned him for info. Hooked one up in the rail and it worked great for awhile. 1978 went back to college, sold the dragster and never touched a rod again. Still sometimes watch, have all my tools, but real life got in the way. Still talk with some of the old timers here, but there are fewer of us every day.

  6. #6

    Nov 2007
    somewhere between here and there, south of over there but north of that place
    titan 3000xd/seahunter mk ll/Ace 250/whites 6000XL Pro
    2,914
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    All Types Of Treasure Hunting
    that's an amazing amount of speed. Growing up near Maplegrove PA dragaway we used to watch when they were still trying to top 200 mph and break 7 second e t

    Just the engineering on those lightning bolts wows me, and to think it all started out with guys with grease under their fingernails. Try to top that china, you won't stand a chance.
    when you tug on a single thing in nature, you'll find it's connected to the rest of the world. John muir

 

 

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