Top Fuel:
Immer wieder faszinierend...
7min. direkt nach dem Rennen den Motor komplett auseinandergenommen...
LinkUnd noch ein paar spannende Fakten zu diesen Maschinen:
Under full throttle, a dragster engine consumes 1-1/2 gallons (1,8-3,7 Liter) 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 (around 900hp).
With 3,000 CFM (84.9 cubic meters per minute oder 84950 liters per minute oder 1416 liter pro sekunde) 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 (3900° Celsius).
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 (760° Celsius). 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 (482km/h) in 4.5 seconds, dragsters must accelerate an average of over 4G's. In order to reach 200 mph (321km/h) (well before half-track), the launch acceleration approaches 8G's.
Dragsters reach over 300 (482km/h) 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 (541km/h) 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 (321km/h). 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 (321km/h) and not only caught, but nearly blasted you off the road when he passed you within a mere 1,320 foot (402m) long race course.
...... and that my friend, is ACCELERATION!
58,700
About what you'll pay, in dollars, for a new, ready-to-run Top Fuel engine.
29
Minutes it takes to tear down and rebuild a Top Fuel engine between rounds. Each engine is rebuilt 184 times a year (if the driver goes to the final round at every race).
2225 (1110kg)
Minimum weight, in pounds, of a Top Fuel dragster. That's a power-to-weight ratio of 3.37 horsepower per pound.
0.84
Seconds it takes for a Top Fueler to accelerate to 100 mph (161km/h) from standstill. At launch, drivers are subjected to up to 4.75 g--more than a space-shuttle astronaut.
12,000 (5450kg)
Downforce, in pounds, generated by the rear wing at 325 mph (523km/h). The downward thrust made by the exhaust gases escaping the headers alone generates 800 pounds (360kg) of downforce.
18
Seconds of racing completed if Tony makes the final. If he makes the final in every race, his total racing time for the season will be less than seven minutes.
Bearbeitet von: kmax_187 am 12.12.2011 um 19:41:24
