A lesson in acceleration. - Sportbike Forum: Sportbike Motorcycle Forums
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post #1 of 16 (permalink) Old 01-17-2004, 07:44 AM Thread Starter
 
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A lesson in acceleration.

First, some useful info:

*One Top Fuel dragster 500 cubic inch Hemi engine makes more horsepower than the first 4 rows at the Daytona 500.

*Under full throttle, a Top Fuel dragster engine consumes 1 1/2 gallons of nitromethane per second; a fully loaded 747 consumes jet fuel at the same rate 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 nitromethane the flame front temperature measure 7050 degrees F.

*Nitromethane burns yellow. The spectacular white flame seen above the stacks at night if 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.

*Dragsters reach over 300 mph 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 red-line is actually quite high at 9500 rpm.

*The bottom line: Assuming all the equipment is paid off, the crew worked for free, and for once, NOTHING BLOWS UP, each run costs an estimated $1,000 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 333.00 mph (533 km/h) as measured over the last 66' of the run (9/28/03 Doug Kalitta.)

You may have seen this but I figured I'd pass it along I got it from one of the ranger websites I go to.

Putting all this into perspective:

You are riding the average $250,000 Honda Moto GP 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 the throttle hard open, 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.

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.

That folks, is acceleration!
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post #2 of 16 (permalink) Old 01-17-2004, 08:23 AM
 
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Very interesting. That dragster sure is pretty damn. fast.
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post #3 of 16 (permalink) Old 01-17-2004, 09:54 PM
 
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geez, i could read stuff like that all day....MORE!
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post #4 of 16 (permalink) Old 01-18-2004, 06:26 AM
 
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As long as the dragster isn't sponsored by Kawasaki I don't mind it beating the RC211V.
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post #5 of 16 (permalink) Old 01-19-2004, 01:24 PM
 
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Cool

Wow! That's very interesting... and a little scary. Anyone have pics of those beasts?
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post #6 of 16 (permalink) Old 01-19-2004, 07:11 PM
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post #7 of 16 (permalink) Old 01-19-2004, 07:33 PM
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Quote:
Originally posted by veektor
Wow! That's very interesting... and a little scary. Anyone have pics of those beasts?

You`ve never seen a top fuel dragster?

Look . . . the people you are after are the people you depend on. We cook your meals, we haul your trash, we connect your calls, we drive your ambulances, we guard you while you sleep. Do not fu|< with us.
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post #8 of 16 (permalink) Old 01-19-2004, 09:08 PM
 
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thats insane...
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post #9 of 16 (permalink) Old 01-20-2004, 08:10 AM
 
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Quote:
Originally posted by little_one_der
pics @
http://www.howaboutyoutryandusegoogle.com/
smartass! It's bad enough I squander my work time reading this forum, now you want me to waste more on looking for pictures?

OK, fine! Beats work anytime!



Thanks for the pic, wantaprilia. I've never been much of a follower on racing subject, but that thing looks BAD!
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post #10 of 16 (permalink) Old 01-20-2004, 08:52 AM Thread Starter
 
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Quote:
Originally posted by little_one_der
pics @
http://www.howaboutyoutryandusegoogle.com/
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