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Old 10-22-2009, 12:57 PM   #1
AVANTI R5
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Default British-made 260mph supercar to tour UK




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Supercar enthusiasts will get a look at the Keating TKR, recently clocked at a top speed of reported 260.1mph, which will be on show at this years MPH show.

The TKR , which reached the astonishing speed at the Elvington Airfield on the Salt Lake Flats in California, has now reportedly gone 3mph quicker than the fastest production car in the world, the Shelby Aero TT.

The Keating Group, which has been developing the 7-litre 2000 BHP car for more than 10 years years, took to the flats in October clocking the speed in front of a Guinness Book of World Records official.

Tony Keating, founder of Keating supercars said: Its fantastic that a UK company has now created a car that can go that fast. Were eager to get back to testing the speed of the car, because we only clocked 260.1mph in one direction, to be entered in to the Guinness Book of World Records it has to be in two.
http://www.timesonline.co.uk/tol/dri...SS&attr=796841
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Old 10-22-2009, 01:00 PM   #2
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2000HP?? so it took almost double Veyron's power to top out 7.1mph higher? interesting....
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Old 10-22-2009, 01:22 PM   #3
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Veyrons are reportedly more like 1300hp so not really double.
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Old 10-22-2009, 02:44 PM   #4
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That's nuts.
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Old 10-22-2009, 03:02 PM   #5
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Quote:
Originally Posted by jigga View Post
2000HP?? so it took almost double Veyron's power to top out 7.1mph higher? interesting....

It took nearly 5,000HP to make it past 350 mph.
Drag sucks.
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Old 10-22-2009, 03:56 PM   #6
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I bet that thing is just as easy to drive, filled with tech, and luxurious as the Veyron...
or it has an LS7 with a couple turbos. After the Veyron, I just don't care that much about the "Burnout: Revenge" styled top speed cars.
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Old 10-22-2009, 04:21 PM   #7
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Originally Posted by KoalaSlim View Post
Veyrons are reportedly more like 1300hp so not really double.
The power required goes up fast too, for a couple reasons. Power to overcome aerodynamic drag goes up with the cube of the speed. And then to keep that power hooked-up, you need progressively more downforce to generate traction, which causes more drag, which you then need more power to overcome...

You can get into a massively escalating spiral very quickly.
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Old 10-22-2009, 04:22 PM   #8
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Quote:
Originally Posted by jigga View Post
2000HP?? so it took almost double Veyron's power to top out 7.1mph higher? interesting....
Salt flats have a lot more drag on the tires.
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Old 10-22-2009, 04:25 PM   #9
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Quote:
Originally Posted by jigga View Post
2000HP?? so it took almost double Veyron's power to top out 7.1mph higher? interesting....
once you get up to about 240ish, each MPH requires about 8 more HP...
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Old 10-22-2009, 05:42 PM   #10
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Originally Posted by under5 View Post
once you get up to about 240ish, each MPH requires about 8 more HP...
What? It would be wise not to make a blanket statement such as that. Thank you.
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Old 10-22-2009, 05:47 PM   #11
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Originally Posted by Evil STI View Post
What? It would be wise not to make a blanket statement such as that. Thank you.
wasn't making it up, but I didn't have the stats in front of me so that's why I said 240 ISH and ABOUT 8 hp. I would get the information for you, but I'm not going to waste my time on you.
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Old 10-22-2009, 08:00 PM   #12
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Originally Posted by under5 View Post
wasn't making it up, but I didn't have the stats in front of me so that's why I said 240 ISH and ABOUT 8 hp. I would get the information for you, but I'm not going to waste my time on you.
Well, you're implying that the relationship is linear, which (even if you are estimating), is not a good reference point at all. If you're not going to waste your time looking at the validity of a stat then why post a stat at all?
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Old 10-22-2009, 08:25 PM   #13
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Originally Posted by under5 View Post
once you get up to about 240ish, each MPH requires about 8 more HP...
Agreed this is BS
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Old 10-22-2009, 08:50 PM   #14
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Quote:
Originally Posted by Evil STI View Post
What? It would be wise not to make a blanket statement such as that. Thank you.
Quote:
Originally Posted by manticus View Post
Well, you're implying that the relationship is linear, which (even if you are estimating), is not a good reference point at all. If you're not going to waste your time looking at the validity of a stat then why post a stat at all?
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Originally Posted by KoalaSlim View Post
Agreed this is BS
alright, someone tell me how much horsepower is required to increase top speed from 240 to 241 mph without changing the aerodynamics or tires.

I'm perfectly content with being wrong if I'm corrected so that I don't have to be wrong again. Don't just say BS without knowing the real answer.
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Old 10-22-2009, 09:06 PM   #15
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alright, someone tell me how much horsepower is required to increase top speed from 240 to 241 mph without changing the aerodynamics or tires.
For a javelin? Not much. For the U.N. Building? A lot!
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Old 10-22-2009, 09:12 PM   #16
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Quote:
Originally Posted by under5 View Post
alright, someone tell me how much horsepower is required to increase top speed from 240 to 241 mph without changing the aerodynamics or tires.

I'm perfectly content with being wrong if I'm corrected so that I don't have to be wrong again. Don't just say BS without knowing the real answer.
5hp, actually. At the wheels. And another 6 to get to 242. And another 7 to get to 243.

(Assuming Cd of 0.30 and frontal area of 1.5m^2, and a rho(air) of 1.2kg/m^3, and neglecting rolling resistance, which becomes non-trivial at high speeds.)

So actually, 8hp was a pretty fair guess.

Last edited by Chromer; 10-22-2009 at 09:19 PM.
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Old 10-22-2009, 09:18 PM   #17
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Originally Posted by Mach V Dan View Post
For a javelin? Not much. For the U.N. Building? A lot!
Hey! i buy stuff from you! Be nice here.

Quote:
Originally Posted by Chromer View Post
5hp, actually. And another 6 to get to 242. And another 7 to get to 243.

(Assuming Cd of 0.30 and frontal area of 1.5m^2, and a rho(air) of 1.2kg/m^3, and neglecting rolling resistance, which becomes non-trivial at high speeds.)

So actually, 8hp was a pretty fair guess.
Thank you sir for your educated and cordial response....
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Old 10-22-2009, 09:19 PM   #18
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Quote:
Originally Posted by Chromer View Post
The power required goes up fast too, for a couple reasons. Power to overcome aerodynamic drag goes up with the cube of the speed. And then to keep that power hooked-up, you need progressively more downforce to generate traction, which causes more drag, which you then need more power to overcome...

You can get into a massively escalating spiral very quickly.
squared, not cubed

Aerodynamic drag = 1/2 D x A x V ^2
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Old 10-22-2009, 09:26 PM   #19
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Quote:
Originally Posted by REX8 View Post
squared, not cubed
Thank you. I checked some alternate sources and apparently... Wrong. I've been doing it wrong.

Last edited by Chromer; 10-22-2009 at 09:38 PM.
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Old 10-22-2009, 09:34 PM   #20
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.....

Last edited by Chromer; 10-22-2009 at 09:39 PM. Reason: never mind...
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Old 10-22-2009, 09:37 PM   #21
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Cars, I love them
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Old 10-22-2009, 09:38 PM   #22
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still liking the cars...
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Old 10-22-2009, 09:47 PM   #23
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Another day, another British supercar with an American V8 that will never be seen or heard of again in a few short months.

There really is a shocking amount of these that die on the vine.

Wish they'd just bring back TVR instead...
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Old 10-23-2009, 12:27 PM   #24
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Quote:
Originally Posted by im2lazy789 View Post
Salt flats have a lot more drag on the tires.
+1

It's like hitting top speed on a dirt/gravel road.

Nick
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Old 10-23-2009, 02:29 PM   #25
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Quote:
Originally Posted by REX8 View Post
Aerodynamic drag = 1/2 D x A x V ^2
Drag roughly follows a square law. But drag is a force, and power requirement is force times velocity. So the power required to overcome drag increases with the cube of the velocity, not the square.
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