dubious
Needs a life
Needs more time to ride!
Posts: 8442
|
posted July 02, 2009 08:42 AM
Acceleration
ACCELERATION
'DEFINITION OF ACCELERATION' (courtesy of Performance Techniques):
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 is working 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!
____________
natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
  
|
BobC
Pro
Posts: 1736
|
posted July 02, 2009 08:48 AM
Terrific, thanks for posting that.
____________
Candy Thunder Blue 2006 ZZR1400
Stock wheelbase
Max: 205.4 mph in 1.25 miles
2012 ZZR1400 in Golden Blazed Green
Brock CT Full System. etc
Max: 203.1 in 1 mile (so far)
|
dubious
Needs a life
Needs more time to ride!
Posts: 8442
|
posted July 02, 2009 08:54 AM
I though it was cool, and would share!
____________
natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
|
gilberjj
Needs a job
Friend of Fast
Posts: 3196
|
posted July 02, 2009 09:16 AM
That is so cool...... I'm going to post that on another forum.
|
zx-twitch
Expert Class
the dude abides
Posts: 247
|
posted July 02, 2009 09:19 AM
thats the best thing I read in a long time!
|
FastestBusaAround
Needs a life
I eat Fish...
Posts: 7889
|
posted July 02, 2009 11:36 AM
 Edited By: FastestBusaAround on 2 Jul 2009 19:36
Fuck that - I can run faster. Those things are just too fucking slow to cost 5k/run.
Hayabusa's are faster than that...I'm gonna sell my 14 and buy one, so I can go posting again at Hayabusa.org or labusas.org along with the rest of the losers. 
____________
FYYFF!!!
|
kaw now
Expert Class
Posts: 446
|
posted July 02, 2009 12:18 PM
Amazing figures but not so fast on the 747 comparison. Maybe the fuel consumption at altitude cruising but each engine is rated at 60000 lbs thrust which roughly equates to 24000 hp or a total of 96000 hp. I might be wrong but a 747 consumes 12500 gallons of fuel on take off and climb out. The plane can hold 57000 gallons of fuel. I believe a top fueler could not drive the compressor of a single engine on a 747.
|
14nooby
Zone Head
Posts: 987
|
posted July 02, 2009 01:43 PM
Pretty cool stuff
|
02zx12rbob
Expert Class
Posts: 496
|
posted July 02, 2009 02:45 PM
Very Nice ! Thanks.
|
northmedic
Expert Class
Posts: 384
|
posted July 02, 2009 03:07 PM
Yeeeeeeeeeee Haaaaaaaaaw sounds fun
____________
I,ll be right back
|
FastestBusaAround
Needs a life
I eat Fish...
Posts: 7889
|
posted July 02, 2009 03:54 PM
Edited By: FastestBusaAround on 2 Jul 2009 23:55
quote:
Amazing figures but not so fast on the 747 comparison. Maybe the fuel consumption at altitude cruising but each engine is rated at 60000 lbs thrust which roughly equates to 24000 hp or a total of 96000 hp. I might be wrong but a 747 consumes 12500 gallons of fuel on take off and climb out. The plane can hold 57000 gallons of fuel. I believe a top fueler could not drive the compressor of a single engine on a 747.
Unless jet fuel weight has recently changed dramatically downwards, you'd be somewhat out on that. Consumption on a loaded 747 from takeoff till cruise is roughly 33000 LBS, equating to 4897 US gallons. The larger (9) tank configuration will however hold around 55000 gallons, so you'd be right there and the total HP would be around 87000+, so you're probably right about the compressor requiring more than a top fueler could provide. The 747 however, does not out accelerate or even come close to a top fueler...not much does though that I can think of, except a bullet...
____________
FYYFF!!!
|
dubious
Needs a life
Needs more time to ride!
Posts: 8442
|
posted July 02, 2009 09:01 PM
yeah , the 747 parts was alittle far fetched.
also, I did the math- it takes 4.5 seconds to cover 1320 ft at 200 mph, so the top fueler would be just blowing through the traps beside the 200 mph car
____________
natural selection.....
destiny will overcome intervention.
Some are not worthy of the effort.
|
TooHype
Expert Class
Go Hard or Go Home !!
Posts: 427
|
posted July 03, 2009 07:38 AM
 The air passing over Rear Spoiler on a Top Fueler creates over 8000 lbs. of down force near the end of the track to make traction.
____________
Go Hard or Go Home !!....2007 Diablo Black ZX-14, BMC Race Filter, Brock's Alien Head, Brock's Radial Mount Strap, PClll with Custom Map, Flies removed, Muzzy fan, Muzzy lowering links, Muzzy Fender Eliminator, 16/41, Speedohealer, Stretched 6", Lowered 3" IN GOD I TRUST !......If You’re a Hater….KILLYASELF !!
|
|
|
HOME
NEW TOPIC