Subject: True acceleration in perspective
13/09/2006 @ 03:15:13: firebird86: True acceleration in perspective


* One Top Fuel dragster 500 cubic inch Hemi engine makes more horsepower than the
first 4 rows of NASCAR race cars at the Daytona 500.

* Under full throttle, a dragster engine consumes 1.5 gallons of nitromethane fuel per second;
a fully loaded 747 consumes JP-4 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. So "So what if it's got a Hemi in it".

* 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 for nitromethane, the flame front temperature measures 7,050 deg F.

* 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 35 to 40 kilovolts at 44 amps to each spark plug. This is the output of an
arc welder in each cylinder. The spark plug electrodes are totally consumed during a pass.
After the halfway point, the engine is dieseling from compression, plus the glow of exhaust
valves at 1,400 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 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 540,000 revolutions from light to light, including the burnout, the engine must survive 900,000 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 estimated $1,000.00 per second.

* The current Top Fuel dragster elapsed time record is 4.441 seconds for the quarter mile set on
10/5/2003 by Tony Schumacher. The top speed record is 333.00 mph. (533 km/h) as measured
over the last 66' of the run set on 9/28/2003 by Doug Kalitta.

Putting all of this into perspective :

You are driving the average $140,000 Lingenfelter "twin-turbo" powered Corvette Z06. Over a mile ahead is a Top Fuel dragster 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 past the dragster at an honest 200 mph. The 'tree' goes green for both
of you at that instant. The dragster launches and starts after you. You keep your foot down hard, but you hear an incredibly loud 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 !





13/09/2006 @ 13:03:33: wickey: True acceleration in perspective
nice :smile: I wanna drive one of those :tongue:
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