acceleration explained!!!!
13-02-2010, 04:32 AM
#1
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acceleration explained!!!!
Acceleration Explained
* One Top Fuel dragster outfitted with a 500 cubic-inch replica Dodge
(actually Keith Black, etc) Hemi engine makes more horsepower (8,000 HP)
than the first 4 rows at NASCAR's Daytona 500.
* Under full throttle, a dragster engine will consume 11.2 gallons of nitro
methane per second; a fully loaded Boeing 747 consumes jet fuel at the same
rate but with 25% less energy being produced.
* A stock Dodge Hemi V8 engine cannot produce enough power to merely 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 lockup 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. Which is typically the
output of an electric arc welder in each cylinder.
* Spark plug electrodes are totally consumed during a pass. After 1/2 way
thru the run, the engine is 'dieseling' from compression and the glow of the
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 enough sufficient force to
blow the cylinder heads off the block in pieces or split the block in half!!
* Dragsters reach over 300 MPH +... before you have completed reading this
sentence.
* In order to exceed 300 MPH in 4.5 seconds, a dragster must accelerate an
average of over 4 G's.. In order to reach 200 MPH well before reaching
half-track, at launch the acceleration approaches 8 G's.
* 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 9500 RPM.
* THE BOTTOM LINE: Assuming all the equipment is paid for, the pit crew is
working for free, and nothing blows up, each run will cost an estimated
$1,000+ per second.
0 to 100 MPH in .8 seconds (the first 60 feet of the run)
0 to 200 MPH in 2.2 seconds (the first 350 feet of the run)
6 G-forces at the starting line (nothing accelerates faster on land)
6 negative G-forces upon deployment of twin 'chutes at 300 MPH
A NHRA Top Fuel Dragster accelerates quicker than any other land vehicle on
earth... quicker than a jet fighter plane....quicker than the space
shuttle....or snapping your fingers!!
The current Top Fuel dragster elapsed time record is 4.420 seconds for the
quarter-mile (2004, Kalitta)
The top speed record is 337.58 MPH as measured over the last 66' of the run
(2005, Tony Schumacher)
Let's now put this all into perspective:
Imagine this............You are driving a new $140,000 Lingenfelter
twin-turbo powered Corvette Z-06.. Over a mile up the road, a Top Fuel
dragster is staged & ready to 'launch' down a quarter-mile strip as you
pass.
You have the advantage of a flying start. You run the Vette hard on up
through the gears and blast across the starting line & pass the dragster at
an honest 200 MPH. The 'tree' goes green for both of you at that exact
second.
The dragster departs & starts after you. You keep your foot buried hard to
the floor, and suddenly you hear an incredibly brutally screaming whine that
seares and pummels your eardrums & within a mere 3 seconds the dragster
effortlessly catches & passes you. He beats you to the finish
line, a quarter-mile away from where you just passed him AT 200 MPH. Think
about it - from a standing start, the dragster had spotted you 200
MPH.....and it not only caught, but nearly blasted you off the planet when
he passed you within a mere 1320 foot long race!!!!
That, my friends.....is ACCELERATION!
* One Top Fuel dragster outfitted with a 500 cubic-inch replica Dodge
(actually Keith Black, etc) Hemi engine makes more horsepower (8,000 HP)
than the first 4 rows at NASCAR's Daytona 500.
* Under full throttle, a dragster engine will consume 11.2 gallons of nitro
methane per second; a fully loaded Boeing 747 consumes jet fuel at the same
rate but with 25% less energy being produced.
* A stock Dodge Hemi V8 engine cannot produce enough power to merely 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 lockup 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. Which is typically the
output of an electric arc welder in each cylinder.
* Spark plug electrodes are totally consumed during a pass. After 1/2 way
thru the run, the engine is 'dieseling' from compression and the glow of the
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 enough sufficient force to
blow the cylinder heads off the block in pieces or split the block in half!!
* Dragsters reach over 300 MPH +... before you have completed reading this
sentence.
* In order to exceed 300 MPH in 4.5 seconds, a dragster must accelerate an
average of over 4 G's.. In order to reach 200 MPH well before reaching
half-track, at launch the acceleration approaches 8 G's.
* 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 9500 RPM.
* THE BOTTOM LINE: Assuming all the equipment is paid for, the pit crew is
working for free, and nothing blows up, each run will cost an estimated
$1,000+ per second.
0 to 100 MPH in .8 seconds (the first 60 feet of the run)
0 to 200 MPH in 2.2 seconds (the first 350 feet of the run)
6 G-forces at the starting line (nothing accelerates faster on land)
6 negative G-forces upon deployment of twin 'chutes at 300 MPH
A NHRA Top Fuel Dragster accelerates quicker than any other land vehicle on
earth... quicker than a jet fighter plane....quicker than the space
shuttle....or snapping your fingers!!
The current Top Fuel dragster elapsed time record is 4.420 seconds for the
quarter-mile (2004, Kalitta)
The top speed record is 337.58 MPH as measured over the last 66' of the run
(2005, Tony Schumacher)
Let's now put this all into perspective:
Imagine this............You are driving a new $140,000 Lingenfelter
twin-turbo powered Corvette Z-06.. Over a mile up the road, a Top Fuel
dragster is staged & ready to 'launch' down a quarter-mile strip as you
pass.
You have the advantage of a flying start. You run the Vette hard on up
through the gears and blast across the starting line & pass the dragster at
an honest 200 MPH. The 'tree' goes green for both of you at that exact
second.
The dragster departs & starts after you. You keep your foot buried hard to
the floor, and suddenly you hear an incredibly brutally screaming whine that
seares and pummels your eardrums & within a mere 3 seconds the dragster
effortlessly catches & passes you. He beats you to the finish
line, a quarter-mile away from where you just passed him AT 200 MPH. Think
about it - from a standing start, the dragster had spotted you 200
MPH.....and it not only caught, but nearly blasted you off the planet when
he passed you within a mere 1320 foot long race!!!!
That, my friends.....is ACCELERATION!
13-02-2010, 07:49 AM
#6
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Ive seen that somewhere before, TBH it defies belief!!
and you still cant appreciate 0-300 in 4 seconds until you see it first hand!
UNREAL machines. lol
and you still cant appreciate 0-300 in 4 seconds until you see it first hand!
UNREAL machines. lol
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13-02-2010, 12:54 PM
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13-02-2010, 11:06 PM
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well if you think your low ohm injectors flow a lot check this test out,,, 
http://www.youtube.com/watch?v=T5lrMWszCR4
http://www.youtube.com/watch?v=T5lrMWszCR4
14-02-2010, 06:15 AM
#15
well if you think your low ohm injectors flow a lot check this test out,,,
http://www.youtube.com/watch?v=T5lrMWszCR4
http://www.youtube.com/watch?v=T5lrMWszCR4
14-02-2010, 09:46 AM
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Some amazing facts!
But what does this bit mean?
* Top Fuel engines turn approximately 540 revolutions from light to light!
* Including the burnout, the engine must only survive 900 revolutions under
load..
What do they mean by revolutions in that context?
Is it how many rpm's it does in the run?
But what does this bit mean?
* Top Fuel engines turn approximately 540 revolutions from light to light!
* Including the burnout, the engine must only survive 900 revolutions under
load..
What do they mean by revolutions in that context?
Is it how many rpm's it does in the run?
Last edited by Icurus; 14-02-2010 at 09:47 AM.
14-02-2010, 10:11 AM
#18
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Some amazing facts!
But what does this bit mean?
* Top Fuel engines turn approximately 540 revolutions from light to light!
* Including the burnout, the engine must only survive 900 revolutions under
load..
What do they mean by revolutions in that context?
Is it how many rpm's it does in the run?
But what does this bit mean?
* Top Fuel engines turn approximately 540 revolutions from light to light!
* Including the burnout, the engine must only survive 900 revolutions under
load..
What do they mean by revolutions in that context?
Is it how many rpm's it does in the run?
14-02-2010, 12:25 PM
#21
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14-02-2010, 04:16 PM
#22
Under full throttle, a dragster engine will consume 11.2 gallons of nitro
methane per second; a fully loaded Boeing 747 consumes jet fuel at the same
rate but with 25% less energy being produced.
not sure i belive that. a 747 makes more than 8000bhp
methane per second; a fully loaded Boeing 747 consumes jet fuel at the same
rate but with 25% less energy being produced.
not sure i belive that. a 747 makes more than 8000bhp
14-02-2010, 05:43 PM
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14-02-2010, 05:46 PM
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Aye .. Thermal efficency.
How much as a % of what turns the wheels and what is simply turned into heat.
This is used for all Energy transfers ...
How much as a % of what turns the wheels and what is simply turned into heat.
This is used for all Energy transfers ...
14-02-2010, 05:52 PM
#29
PassionFord Post Troll
how long to the tyres last for these? and how much is a new one?
that bit about the race at the end
fook me that realy puts it into perspective
what does 14:71 mean with the supercharger?
how much it compresses the air?
that bit about the race at the end
fook me that realy puts it into perspectivewhat does 14:71 mean with the supercharger?
how much it compresses the air?
14-02-2010, 06:36 PM
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it's the size of and somehow related to the amount of air it's capable of flowing,size of pulleys makes difference to,don't remeber how much overdrive they use but it's a lot
Last edited by meanxpress; 14-02-2010 at 06:37 PM.
05-02-2011, 01:03 PM
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14:71 = 5 bar
its to do with the imperial mesurments and fractions and stuff.
superchargers in the states have always been mesured this way
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