Definition of acceleration

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realneil Automobile [au] Posted: Thu, Sep 16 2010 7:27 PM

I have a friend who is into drag racing and has been for years. He just sent me this and I just HAD to share it with you guys.          Stick out tongueQuite Impressive!Stick out tongue

   Wilted Flower RealNeil Wilted Flower

__________________________________________________________


     DEFINITION OF ACCELERATION

    There are no rockets or airplanes built by any government in the
    world that can accelerate from a standing start as fast as a Top
    Fuel Dragster or Funny Car!


    One top fuel dragster 500 cubic inch Hemi engine makes more
    horsepower than the first 4 rows of stock cars at the Daytona 500.
 
(and any half of the cars on a Formula 1 grid!!!, Kev)

    It takes just 15/100ths of a second for all 6,000+ horsepower of an
    NHRA Top Fuel dragster engine to reach the rear wheels.

    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 4.428 seconds
    for the quarter mile (11/12/06, Tony Schumacher, at Pomona, CA). The
    top speed record is 336.15 mph 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. 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 (400 metres!!) long race course.

    ...and that my friend, is ACCELERATION!

Dogs are great judges of character, and if your dog doesn't like somebody being around, you shouldn't trust them.

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Super Dave replied on Thu, Sep 16 2010 10:38 PM

realneil:
Dual magnetos supply 44 amps to each spark plug. This is the output
    of an arc welder in each cylinder.

That's enough juice to stop your heart!

 SPAM-posters beware! ®

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acarzt replied on Fri, Sep 17 2010 3:30 AM

Yea, top fuel dragsters are insane.

My lightly modified Mustang GT has put up a best of 13.2s @ 106.5mph in the 1/4 mile lol

Not even worth comparing to a top fuel dragster.

I could start halfway down the track and the dragster would beat me.

You could start a 1001HP Bugatti Veyron halfway down the track and the Dragster will still beat it.

But  a top fuel dragster can't take a corner lol

In the handling department F1 cars take it to the extreme. They can pull over 5 Gs in a corner! A Corvette can pull 1 :-P

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realneil replied on Fri, Sep 17 2010 10:32 AM

acarzt:
a top fuel dragster can't take a corner

Because they're not designed to do so.

acarzt:
F1 cars take it to the extreme

Boy oh boy that's no bull.

I posted this because the stats are impressive. They impressed me anyhow,............I really like older Muscle Cars.

I rode in a 1965 Dodge Coronet Hemi (533 cubic inch Hemi running 650 horsepower) down the track at the Los Angeles County Speedway in Littlerock, California. I had been bugging my buddy for a ride in it and when we went, he pulled it up into a wheel-stand at 50 miles per hour! Scared the crap out of me too. That car was a rolling adrenalin rush.


Dogs are great judges of character, and if your dog doesn't like somebody being around, you shouldn't trust them.

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acarzt replied on Sun, Sep 26 2010 5:09 PM

lol, yea I don't mean to take anything away from the dragster, I know the types of driving are VASTLY different and the suspension setup is completely different between the 2.

Personally i'm into both drag racing and road racing(well, autocross anyway lol)

A drag racer will remove the front sway bar to save weight up front and transfer weight to the rear... doing this on a road race car would be lunacy. lol

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jcollura replied on Tue, Nov 23 2010 11:19 PM

RealNeil,

I have a few friends that built and raced Top Fuel bikes and I asked them to comment on this post. Here is what they said.

OK, here we go.. I'm sure this is going to stir some controversy, but remember I am pulling numbers from my memory and personal experience of the 60's, 70's and early 80's.
 
I am going to give my opinion of each of the claims of this article at the end of each claim.. Maybe this will start some debate and we all will get the correct answers before its over. It will be interesting to know just how little I know now days.....
The Definition of Acceleration

 


 

Read this thru slowly and try to comprehend the amount of force produced in just under 4 seconds!

There are no rockets or airplanes built by any government in the world that can accelerate from a standing start as fast as a Top Fuel Dragster or Funny Car!

(This is not true. I used the "MythBusters" technique on this one. While at lunch today I grabbed a $3.00 bottle rocket made in Hong Kong (left over from July 4th) and laid it down on the road in front of my house. It is exactly 1/4 mile from my driveway to the end of the road. I got out my old stopwatch, lit the fuse and barely got the start button clicked before it hit the trees at the end of the road. I'm guessing about 2-3 seconds. We will lay this one to rest without discussing any of the many other vehicles that come to mind. "BUSTED")

One top fuel dragster 500 cubic inch Hemi engine makes more horsepower than the first 4 rows of stock cars at the Daytona 500. 

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^but it can be used by a human. And if you did make a rocket that was capable, which most non man flown ones are, it would kill someone.  

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