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QwkTrip 11sec Club

Joined: 17 Feb 2004 Posts: 3942 Location: Peoria, IL
1989 Pontiac Firebird
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Posted: Wed Sep 05, 2007 6:10 pm Post subject: Top Fuel Dragster - A Lesson In Acceleration |
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Believe it or not, my Mom sent this to me by e-mail. Not sure the source but it seems fairly reasonable at first glance.
* One NHRA Top Fuel dragster 500 cubic inch Hemi engine makes more horsepower than all the cars in the first four rows at the Daytona 500.
* Under full throttle, a Top Fuel dragster engine consumes 1 gallon of nitro methane per second; a fully loaded 747 consumes jet fuel at the same rate, but with 25% less energy being produced.
* A stock Dodge 426 Hemi V8 engine cannot produce enough power to 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 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 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).
* In order to exceed 300 mph in 4.5 seconds dragsters must accelerate at an average of over 4G's. In order to reach 200 mph well before half-track, the launch acceleration approaches 8G's (most reach over 260 mph by half track).
* 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 rpm redline is actually quite high at 9500 rpm.
* The Bottom Line; assuming all the equipment is funded, the crew works for free, and if, for once, NOTHING BLOWS UP, each run costs an estimated $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 for you bikers: You are riding the average $250,000 Honda MotoGP bike. 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 RC211V hard up through the gears and blast across the starting line and past the dragster at an honest 200 mph (293 ft/sec). The 'tree' goes green for both of you at that moment. The dragster launches and starts after you. You keep your wrist cranked 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 1320 foot long race course (just three city blocks in length). That, folks, is acceleration! |
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Sellmanb Member
Joined: 30 Nov 2004 Posts: 727 Location: Tigard, OR
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Posted: Wed Sep 05, 2007 9:00 pm Post subject: |
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almost romantic sounding...  |
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Xophertony Rodeo Queen

Joined: 13 Oct 2005 Posts: 5306 Location: Portland, Oregon.
1988 Pontiac GTA
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Posted: Wed Sep 05, 2007 11:36 pm Post subject: |
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| neat |
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91RSVert Member
Joined: 16 May 2007 Posts: 2736 Location: AR
1991 Chevrolet Camaro RS
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Posted: Thu Sep 06, 2007 4:26 am Post subject: |
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| good stuff. |
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mrpopo573 Member
Joined: 13 Oct 2005 Posts: 761 Location: Port Townsend/Maui HI
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Posted: Thu Sep 06, 2007 7:21 am Post subject: |
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Anyone else get really excited during that article? _________________
| 305302eater wrote: | Man I would love a 69. I hate you so much.
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2000 Maxima SE 5 Speed VQ30
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blue89 Member

Joined: 23 May 2006 Posts: 3482 Location: Bellingham/Eugene
1986 Chevrolet Camaro RS
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Posted: Thu Sep 06, 2007 11:49 am Post subject: |
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| If you've never seen them race, you should. Nothing can describe what a 4 second quarter mile sounds like. An amazing performance of controlled explosions. |
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Kage87Z Member

Joined: 19 Jan 2004 Posts: 436 Location: 12 Second Club
1969 Chevrolet Camaro
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