Author Topic: Acceleration Defined  (Read 1914 times)

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Doc

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Acceleration Defined
« on: January 02, 2009, 09:10:33 am »
Was sent an email containing this little read and it was quite interesting. Puts things into pespective and maybe some of the idiot tappet heads on the road these days should read and see just how insignificant and amateur their blow off valved twin turbo'd rice burner efforts really are :D

If you were ever actively or passively interested in drag racing this is a good read.

 
Gear heads:
====================
"Acceleration" Defined.... (Per the Keith Black Website)

One top fuel dragster 500 cubic inch Hemi engine makes more horsepower than the first 4 rows of stock cars at the Daytona 500.
(Almost 7,000 hp)

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 4.441 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, picture this scenario:
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!

oldfart

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Re: Acceleration Defined
« Reply #1 on: January 02, 2009, 05:58:26 pm »
Used to frequent the pits in the days ( in the (90s) and love the moment an engine fired up ...warm up period also to check for leaks . The engine tuner would give it a quick blip and belive me it would send any Db meter off it's scale, another trick was to stay away from the headers as abelly full of those fumes would take your breath away
Ah and the clutch man , a little bit out here and good by engine ...yes those plates got that hot you could cook a steak on the suckers
In an hour they could totaly rebuild a motor while it's still in the chassie

Bring back  Graeme Cowan and Jim reed battles .....Rachelle Spatt - Darren DiFillipo -Rapisardo - Terry Sainty -Roy Smith -Romeo Capitanio and the giant killer Robin Kirby
A blast from the past

Offline Tim754

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Re: Acceleration Defined
« Reply #2 on: January 02, 2009, 11:13:23 pm »
Agree 100% Oldfart!!!! Shame that a few on that list have retired. Still got my daughters Rachelle Splatt autographed poster hanging up, that tiny woman showed all what guts and go she could muster. Docs post is actually a few years out of date, the Top Fuel Rail V8 Dragsters can top 8000hp now !!!!!!!!!................ :o
« Last Edit: January 02, 2009, 11:15:44 pm by Tim754 »
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TooFastTim

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Re: Acceleration Defined
« Reply #3 on: January 03, 2009, 10:20:26 pm »
Thanks Doc. I've been looking for that for a while.

More accelleration: http://www.youtube.com/watch?v=a2JkMCzjTVE

number 87

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Re: Acceleration Defined
« Reply #4 on: January 04, 2009, 01:16:20 pm »
That is really cool sh#t!!!

TooFastTim

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Re: Acceleration Defined
« Reply #5 on: January 04, 2009, 05:59:30 pm »
Still got my daughters Rachelle Splatt autographed poster hanging up,

You CANNOT be serious? I can't think of a more apt name for a drag racer.

Offline Tim754

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Re: Acceleration Defined
« Reply #6 on: January 04, 2009, 11:27:51 pm »
Is for real . Her father Ian Splatt made still very sort after magnesium alloy wheels for cars in the 70s,80s and 90s here in Victoria. ('Dragways' brand) Rachelle was for sometime the worlds fastest woman top fuel drag racer. :)

Australia’s fastest mum, Rachelle Splatt is making a comeback to racing.

Dubbed the “Queen of Speed”, Splatt will make her return in a state-of-the-art Top Fuel dragster at the Snap-On Tools Nitro Championships event being held at the Western Sydney International Dragway on 13-15 May.


Splatt set the drag racing world alight in the early 1990s, winning the Australian Nationals on debut, setting both national and international records, along with also becoming the first female driver in the world to break the 300mph (480km/h) barrier.

She retired from racing in early 2000 to concentrate on her family and now she and husband Wayne Lusk are the proud parents of three children – daughter Kayla (6) and sons, Jayden (4) and Dylan (1).

“Racing has always been a part of my life, but Wayne and I needed some time to concentrate on our family. Everything at home is now the way it should be, our family is complete, so the time is right to return to racing,” Splatt said.

In addition to motherhood, Splatt also has a career as general manager of Dragway Performance Engineering, a business established by her father, champion drag racing veteran Ian Splatt in the late 1960s.

“Juggling work and family can be difficult, but it is made easier by being organised, having systems in place and having great support from our family and staff members,” Splatt said.

“Now that I’m racing again there’s something else to juggle, but any mother will tell you if you can handle three kids then anything else is a breeze, especially a 300mph race car!”

Splatt first rose to prominence in late 1992 when, despite calls of protest from her male peers, she bypassed drag racing’s lower, ‘learning’ categories and jumped straight into the seat of a Top Fuel dragster to earn her racing licence.

Just a few months later in March 1993, Splatt set the drag racing world on its ear when she not only redefined the performance standards for the sport in this country with a quickest ever pass of 5.20 seconds for the standing quarter-mile at a national record-setting speed of 273 miles per hour, but for also winning the prestigious Australian National Championships on debut.

Splatt’s stunning performance earned worldwide praise and caught the attention of a major professional team in the U.S., earning her a full-time and fully sponsored drive in the Luxor Casino dragster on the lucrative NHRA drag racing tour for the 1994 season.

While there, Splatt became the first woman to crack the 300mph barrier (480km/h) with a ‘spot on’ terminal speed of 300.00mph while racing in Houston, Texas; the achievement earning her membership in the elite Slick 50 300mph Club.

“To have my name listed with some of the greats of the sport in the U.S. remains the highlight of my career; there were only 16 spots available in the club and I am the only Australian and only female member – it was something I’d never dreamed possible,” Splatt said.

Splatt says that her acceptance by her male counterparts back home changed following her historic performance.

“From the beginning I was accepted I suppose, but I was still always ‘the girl’. When I broke the 300mph barrier it all changed for the better after that.”

In 1995, Splatt returned home to set up her own team and contest the Australian Top Fuel Championship Series. She continued racing until 2000 before retiring.

In a brief, one-off appearance at the Quit Motorplex near Perth in 2003, she recorded the track’s first ever four-second pass, setting the track record to 4.96 seconds.

Splatt’s comeback will be made at the wheel of a state-of-the-art Top Fuel dragster which recently landed in Australia. The car produces approximately 7,000 horsepower and has recorded a best time of 4.57 seconds for the standing quarter-mile with a best terminal speed of 325 miles per hour (523km/h).

While a major sponsor is yet to be signed, associate sponsorship will come from Dragway Performance Engineering, Bob Jane T-Marts, Smart Aluminium, Dickies and The Creative Ones.
« Last Edit: January 04, 2009, 11:32:47 pm by Tim754 »
I may not agree with what you have to say, but I'll defend to the death your right to say it.
                                                   Voltaire.