Subject: FW: The Definition of Acceleration...
Read this thru slowly and try to comprehend the amount of force produced in
just under 4 seconds!
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!
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!
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