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acceleration (definition)

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Old 01-01-2007, 03:49 PM
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acceleration (definition)

Subject: Fw: Definition of Acceleration


Talk about playing with physics...most interesting...




Subject: 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.

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 (10/5/03), Tony Schumacher). The top speed
record is 336.15 mph (533 km/h) as measured over the last 66' of the
run (5/25/05)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*


Got this from a friend...... does indeed put things in perspective.
Old 01-01-2007, 04:47 PM
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Another consideration. Some top fuel drag racers are developing vision problems from the constant acceleration, deceleraton.
I used to watch NHRA religiously. I loved the fact that the race was over and decided within my attention span.
Old 01-01-2007, 05:38 PM
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Red face

That's I love NHRA & hate NASCAR.

At one time Mopar used to finish 1-2-3 in NASCAR.

The other teams cried, so they banned the Chrysler HEMI in NASCAR.
Old 01-01-2007, 05:49 PM
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Thumbs up

Originally Posted by CButler610
Subject: Fw: Definition of Acceleration


Talk about playing with physics...most interesting...




Subject: 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.

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 (10/5/03), Tony Schumacher). The top speed
record is 336.15 mph (533 km/h) as measured over the last 66' of the
run (5/25/05)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*


Got this from a friend...... does indeed put things in perspective.
Good Video to go along w/ the above:

The Winning Tradition of the KING of ENGINES

http://www.youtube.com/watch?v=-o76vJLVtlU
Old 01-01-2007, 05:56 PM
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Originally Posted by Hemi Dart
Good Video to go along w/ the above:

The Winning Tradition of the KING of ENGINES

http://www.youtube.com/watch?v=-o76vJLVtlU
the good ole days when the driver turned wrenches and behaved like normal people.
Old 01-01-2007, 11:39 PM
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It was really fun. Drive all night Friday night after work. Run a couple qualify runs at one track, load up and drive a couple hundred miles for a nite match race, come back for the Sunday races. run 3 runs load up and head home. Make it to work at 7 am Monday. Work all day, head to the race shop by 5 pm. Work on the racer 'till mid nite, home for a couple hours and back to work the next day. All week long. Then load up again Friday for the weekend.

We never had time to get in trouble.

The most important thing I learned in college was how to drink coffee. It allowed us to do this stuff for a lot of years
Old 01-02-2007, 01:03 AM
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Originally Posted by Hemi Dart
Good Video to go along w/ the above:

The Winning Tradition of the KING of ENGINES

http://www.youtube.com/watch?v=-o76vJLVtlU

Man .... those were some sexy cars !!! I love seeing the old Mopar muscle on the track. The "painted ladies" that they run down the track nowadays have only a fraction of the style that those old rides had.

The new ones all look the same ... just different stickers .

PISTOL
Old 01-02-2007, 02:49 AM
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Those are allot of old memories, spent many Wednesday nights and Saturdays at Irwindale, OCIR and Lyons Dragstrip.
$3.00 and you could race all night long.

That gave you Sunday to get it back together so you could go to work on Monday.

Knew Mickey Thompson, Don Nicholson, Rhonda from Gas Rhonda, Steve Bovan, Les Ritchey, Jim Clark and lots more.

There were real Speed Shops where you could get your parts from.
850CFM double pumper Holley carbeurator for $45.00

That was fun.
Jim
Old 01-02-2007, 02:51 AM
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Originally Posted by PistolWhipt
]
The new ones all look the same ... just different stickers .

PISTOL
But at least they're faster...
Old 01-02-2007, 03:34 AM
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Originally Posted by Begle1
But at least they're faster...
I like to compare hotrods to women ..... it's better to have a fine looking, girl next door, "naturally aspirated" classic that takes her time than to have a plastic, high maintenance, "Injected" clone that looks like all the rest and is down the road in less time than it takes to heat the tires !!


PISTOL
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