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Topic: DEFINITION OF ACCELERATION

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DEFINITION OF ACCELERATION (1/15)
 1/16/12 10:58pm
NorskyLifetime Member
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Burke, VT - USA

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This has probably been around for awhile and many have most likely already seen it.  Having been at the NHRA Summer Nationals a couple of times and seen 300+ MPH runs this still blows my mind.
 
+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
 
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!
 

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.
 
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 4 G's. In order to reach 200 mph (well before half-track), the launch acceleration approaches 8 G'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 long race course.
 
...... that, is ACCELERATION!  
 


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Re: DEFINITION OF ACCELERATION (2/15)
 1/16/12 11:23pm
rod7515Lifetime Member
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Red Lion, PA - USA

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Great post, when you really think about all that, thats fast!

Rodney


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Re: DEFINITION OF ACCELERATION (3/15)
 1/16/12 11:40pm
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Sounds like a typical drive to work around here....LOL

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Re: DEFINITION OF ACCELERATION (4/15)
 1/17/12 12:11am
Jaws79Lifetime Member
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WOW!!!!!!!!!!
 
Barry
 
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Re: DEFINITION OF ACCELERATION (5/15)
 1/17/12 1:09am
daveo76
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Vancouver, WA - USA

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You gotta love stats like those.  Thanks for sharing.

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1976 Silver/Firethorn.  L48, 4spd.  Original 2 bolt, vortec heads, 9.4:1 CR, Speed Pro Cam: 224/224@0.050, 112 LSA, Eagle Steel Crank.
Re: DEFINITION OF ACCELERATION (6/15)
 1/17/12 1:16am
lukesvetteLifetime Member
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Holy Gs!!!!Clown
Re: DEFINITION OF ACCELERATION (7/15)
 1/17/12 2:10am
dskopp
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Oak Creek, WI - USA

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1981 Great White Shark. Red Interior, 350/190hp. PS, PB (SS), A/C CC, T-Tops, Going to remain as Stock as possible. Served three years in Active Duty Army, then Retired Air Force after 34 years! Badger State Vetts Car Club. 175,000 Original miles!!


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My head hurts from thinking about it !!
DanGeek


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Re: DEFINITION OF ACCELERATION (8/15)
 1/17/12 9:56am
Willis76Lifetime Member
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Rockland, MA - USA

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Very interesting - makes me wonder how John Force continues to drive those funny cars after all these years.
 
Thanks Cool


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Re: DEFINITION OF ACCELERATION (9/15)
 1/17/12 12:03pm
indy99
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I feel like that on my moped all the time.LOL



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Re: DEFINITION OF ACCELERATION (10/15)
 1/17/12 1:31pm
manchestersharkLifetime Member
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Ouch So much for the Eagle GT's.  

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Re: DEFINITION OF ACCELERATION (11/15)
 1/17/12 2:21pm
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Duncanville, TX - USA

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Willis76 said: Very interesting - makes me wonder how John Force continues to drive those funny cars after all these years.
 
Thanks Cool


Well...it's like this...once you've been in one, and made a strong pass down the track, you just cain't get enough of it anymore. Much like fighter pilots and such, the rush is just too incredible to wanna stop...even if ya hit the wall a few times @200mph!
The acceleration is phenomenal....and addictive.


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Re: DEFINITION OF ACCELERATION (12/15)
 1/17/12 10:14pm
tb2k82ceLifetime Member
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That is a woppie alright. Only thing that I know of that can match that is 300 feet long and goes from Zero to between 240 and 280 mph in 2 seconds or so. 

Any carrier pilots out there in corvette land? 

I got a chance to take a cat shot and landing once on a Navy aircraft carrier 0-240mph in 2secs (about 300 feet).  Landing was not quite as bad because you come in slower and I was sitting back words so and just pressed against the seat.

Your story puts some prospective on why the cockpit of a dragster is so from fitting.  The G force is incredibly debilitating if you are not strapped in tight.

I know there are a few jet pilots in the group that know firsthand about what G forces can do and how hard it is to fight against them. 

That dragster story is unbelievable.  I had no comprehension.

Re: DEFINITION OF ACCELERATION (13/15)
 1/19/12 3:22pm
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Totally Exherlating.........something I've ALWAYS wanted to doThumbs Up



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Re: DEFINITION OF ACCELERATION (14/15)
 1/19/12 3:47pm
DaveMLifetime Member
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Flanders, NJ - USA

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YOU'LL POKE YOUR EYE OUT!!

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Re: DEFINITION OF ACCELERATION (15/15)
 1/19/12 11:35pm
Adams' AppleLifetime Member
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DaveM said: YOU'LL POKE YOUR EYE OUT!!


    

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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

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