[DeTomaso] THE DEFINITION OF ACCELERATION!!
David Fisher
fisher95020 at yahoo.com
Tue Sep 18 10:15:01 EDT 2012
Truly awesome!
Sent from my iPad
On Sep 18, 2012, at 7:04 AM, Dave <dave at damardirect.com> wrote:
> THE 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
> but 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 heat of the 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 immediately builds up in
> the affected cylinder 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 one 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!
>
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