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Subject: Acceleration Defined


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Subject: Acceleration Defined

 

 

One top fuel dragster 500 cubic inch Hemi engine

makes more horsepower

than the first 4 rows of stock cars at the Daytona

500.

 

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 4.441 seconds for the

quarter mile (10/05/03, Tony Schumacher). The

top speed record is 333.00

mph (533 km/h) as measured over the last 66' of

the run (09/28/03 Doug Kalitta).

 

Putting all of this into perspective, picture

this scenario: 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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Nitro is a bitch. Our nitro powered 120" Shovel Head drag bike puts out 600 plus HP. Only problem is we hardly ever have enough money to race it often. It usualy runs us $1,500 to $2,000 for one day of racing & along with one other forum member (thanks Paul) it has to come out of our pockets (and we are poor folk).

Sponsers are always welcome & we do carry "Iron Indian Riders" stickers on it.

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Nitro is a bitch. Our nitro powered 120" Shovel Head drag bike puts out 600 plus HP. Only problem is we hardly ever have enough money to race it often. It usualy runs us $1,500 to $2,000 for one day of racing & along with one other forum member (thanks Paul) it has to come out of our pockets (and we are poor folk).

Sponsers are always welcome & we do carry "Iron Indian Riders" stickers on it.

 

Charlie,

Look forward to seeing you run at San antonio if you decide to.

 

Rosie

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