You are right, at 2000 rpm, it only has 2000 hp........
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| oldie but goodie.... http://www.kawi2strokes.com/forum/viewtopic.php?f=21&t=5229 |
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| Author: | Ja-Moo [ Fri Dec 21, 2012 12:43 pm ] |
| Post subject: | oldie but goodie.... |
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! 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 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 long race course. ...... and that my friend, is ACCELERATION! |
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| Author: | Zambia [ Fri Dec 21, 2012 1:36 pm ] |
| Post subject: | Re: oldie but goodie.... |
..maybe -- but does it have a power band?? .....Ha! I didn't think so. |
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| Author: | Ja-Moo [ Fri Dec 21, 2012 1:45 pm ] |
| Post subject: | Re: oldie but goodie.... |
You are right, at 2000 rpm, it only has 2000 hp........
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| Author: | Scully [ Fri Dec 21, 2012 8:21 pm ] |
| Post subject: | Re: oldie but goodie.... |
a 747 engine lasts for years  and makes about 50000shaft HP
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| Author: | Ric [ Fri Dec 21, 2012 9:06 pm ] |
| Post subject: | Re: oldie but goodie.... |
Ja-Moo wrote: 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! TOW 2A T + 1.6 Sec Missile velocity = ~745 mph  When I do the math....I get to the finish line first.....I'll be dead of course......but I'll get there first !!!  From directly along side the launcher: http://www.youtube.com/watch?v=09_4KkbjwWI This view yields a better understanding of the speed, listen for the click when viewing the truck: http://www.youtube.com/watch?v=0XtFebwcOV8 Hope this puts to rest any question as to what rocket scientist can do in the realm of acceleration.....
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| Author: | don k [ Fri Dec 21, 2012 10:28 pm ] |
| Post subject: | Re: oldie but goodie.... |
Well considering they idle at 2-2500 rpm and redline at 9500+ thats a damn wide powerband if ya ask me...  We can only dream! Don |
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| Author: | Ja-Moo [ Fri Dec 21, 2012 10:33 pm ] |
| Post subject: | Re: oldie but goodie.... |
A missle ain't a rocket........
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| Author: | Ric [ Sat Dec 22, 2012 8:49 am ] |
| Post subject: | Re: oldie but goodie.... |
Ja-Moo wrote: A missle ain't a rocket........ HA....well....in the business people prefer "Missile". Usually "Rocket" is considered something unguided and goes ballistic, like MLRS. You're hot-rod might actually beat these puppies. http://www.youtube.com/watch?v=qRWxi_kz_sY Although there is a version of MLRS that is guided (M30/31) |
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| Author: | Agent H2 [ Tue Dec 25, 2012 11:29 pm ] |
| Post subject: | Re: oldie but goodie.... |
Don't know if they still allow but I was at the 1973 top fuel NHRA nationals in Indy. They had a walkway bridge over the stageing area you could walk across. Had flimsy signs covering it so you couldn't have a full view but there were plenty of gaps and you could see the dragsters directly beneath you lighting up the tires. Once you are directly above a top fueler and they light the fuse you will never forget it. Every bone it your body rattles. It all makes perfect sense because something damn skippy is happening inside those motors. They got my respect a looong time ago. |
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