ACCELERATION
PUT INTO PERSPECTIVE
* One Top Fuel dragster 500
cubic-inch Hemi engine makes more horsepower (8,000 HP) than the first 4 rows
at the Daytona 500.
* Under full throttle, a dragster
engine consumes 11.2 gallons of nitro methane per second; a fully loaded 74
consumes jet fuel at the same rate with 25% less energy being
produced.
* A stock Dodge Hemi V8 engine cannot
produce enough power to merely drive the dragster's supercharger.
* With 3000 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 1.7:1
air/fuel mixture for nitro methane the flame front temperature measures 7050
degrees F.
* Nitro methane burns yellow. The
spectacular white flame seen above the stacks at night is raw burning hydrogen,
dissociated from atmospheric water vapour 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 1/2 way, the engine is dieseling from compression
plus the glow of exhaust valves at 1400 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.
* Dragsters reach over 300 MPH before
you have completed reading this sentence.
* In order to exceed 300 MPH in 4.5
seconds, dragsters must accelerate an average of over 4 G's. In order to reach
200 MPH well before half-track, the launch acceleration approaches 8 G's.
* 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 9500 RPM.
* THE BOTTOM LINE: Assuming all the
equipment is paid off, the crew worked for free, & for once, NOTHING BLOWS
UP, each run costs an estimated $1,000 per second.
0 to 100 MPH in .8 seconds (the first
60 feet of the run)
0 to 200 MPH in 2.2 seconds (the
first 350 feet of the run)
6 g-forces at the starting line
(nothing accelerates faster on land)
6 negative g-forces upon deployment
of twin 'chutes at 300 MPH
An NHRA Top Fuel Dragster accelerates
quicker than any other land vehicle on earth . . quicker than a jet fighter
plane . . . quicker than the space shuttle.
The current Top Fuel dragster elapsed time record is 4.420 seconds for the
quarter-mile (2004, Doug Kalitta). The top speed record is 337.58 MPH as
measured over the last 66'
of the run (2005, Tony Schumacher).
Putting this all 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 & 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 & pass the dragster at an honest 200 MPH. The 'tree' goes
green for both of you at that moment.
The dragster launches & starts after you. You keep your foot down hard, but
you hear an incredibly brutal whine that sears your eardrums & within 3
seconds the dragster catches & 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 & not only caught, but nearly blasted you off the road when he passed
you within a mere 1320 foot long race!
That's acceleration !