dragster écolo

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dragster écolo

Messagepar JM65 » 29 Avr 2020, 22:58

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Re: dragster écolo

Messagepar Leroy 17 » 30 Avr 2020, 07:10

Ouais... Et après les 400 mètres en moins de 8 secondes il faut une dépanneuse pour la ramener à la prise de recharge ....
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Re: dragster écolo

Messagepar phil64 » 30 Avr 2020, 08:31

Mauvaise langue :D :D :D :D

(...) Les autres détails concernant la batterie électrique ou encore l’autonomie n’ont pas encore été mentionnés par la marque américaine.
Phil "Running",
Imperial 1957 Crown convertible
Dodge 1973 Monaco station wagon
Mercury 1957 Voyager 4dr/HT wagon

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Re: dragster écolo

Messagepar Leroy 17 » 30 Avr 2020, 11:18

L'autonomie ?
C'est simple: 1000 kms à l'allure d'une Fiesta et 10 kms à fond les ballons en étant optimiste ... :lol: :lol:
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Re: dragster écolo

Messagepar phil64 » 30 Avr 2020, 12:55

Bon c'est quand même loin des temps de Schumacher (Tony, pas Michael) qui est de 4"44 au 1/4 mile. A ce sujet ça n'existe plus parait-il en NHRA, à cause des vitesses atteintes, maintenant c'est le 1000 ft (305 m).
Et ceci pour des top fuel, on ne parle pas des rocket cars qui sont autour de 3"3 au 1/4 mile !!!

A lire (top fuel)

- Dragsters reach over 300 miles per hour before you have completed reading this sentence.
- 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 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 Hemi V8 engine cannot produce enough power to drive the dragster 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 (stoichiometry: methodology and technology by which quantities of reactants and products in chemical reactions are determined) 1.7:1 air/fuel mixture for nitromethane the flame front temperature measures 7050 degrees F.
- Nitromethane 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 ½ 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 an average of over 4G's. In order to reach 200 mph well before half-track, the launch acceleration approaches 8G'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 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).
- 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 $1,000.00 per second.

Le texte cité date de 2005....

Et une petite comparaison (je traduirai s'il faut) erntre une Z06 twin turbo et un drag'.

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 & 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 & pass the dragster at an honest 200 MPH. The 'tree' goes green for both of you at that moment.

The dragster launches & starts after you. You keep your foot down hard, but you hear an incredibly brutal whine that sears your eardrums & within 3 seconds the dragster catches & 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 & not only cau ght, but nearly blasted you off the road when he passed you within a mere 1000 foot long race!


Je ne crois pas que l'électrique est prêt pour ça ....
Phil "Running",
Imperial 1957 Crown convertible
Dodge 1973 Monaco station wagon
Mercury 1957 Voyager 4dr/HT wagon

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Re: dragster écolo

Messagepar Chrome58 » 30 Avr 2020, 20:37

Extraordinaires, ces statistiques !!
:shock: :shock: :shock:
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