Aston Martin's Cosworth 6.5L 1000 hp V12 is NATURALLY ASPIRATED

Yes there is enough H2O around the planet to raise sea levels by 20m.  Probably 200, even 400. coo.

In the last 15000 years sea levels have risen by 110m, as the ice caps melted. The current rate, 3m per 1000 years, would be an indiscernible blip on this graph.

Edited by Greg Locock, 04 October 2019 - 21:58.

Sea ice is little of a problem since it displaces 90% of its volume so melting it would make only a small variation.

Sea ice actually is no problem. When it melts it shrinks to fit into the 90% space that was already underwater.

Sea level is rising at 0.3m per century. New research suggests it could be 3.0m per century by the end of this century.

https://theconversat...rrifying-126017

 

The Earth is presently in an interglacial period which began about 10,000 years ago. But greenhouse gas emissions over the past 200 years have caused climate changes that are faster and more extreme than experienced during the last interglacial. This means past rates of sea level rise provide only low-end predictions of what might happen in future.

 

We examined data from the last interglacial, which occurred 125,000 to 118,000 years ago. Temperatures were up to 1℃ higher than today - similar to those projected for the near future.

 

Our research reveals that ice melt in the last interglacial period caused global seas to rise about 10 metres above the present level. The ice melted first in Antarctica, then a few thousand years later in Greenland.

 

Sea levels rose at up to 3 metres per century, far exceeding the roughly 0.3-metre rise observed over the past 150 years.

Edited by gruntguru, 03 April 2020 - 03:41.

I wonder what it is like to work at Cosworth right now designing a pair of V12s for probably the greatest Formula 1 designers since Chapman.  What a time.  I hope stories get shared one day soon.

A little piece on that "other" V12 Cosworth is building.

https://newatlas.com...9b6e5d-90270322

  Car/engine seem OK - but fan appears to be a gimmick.  What drives it?  How much power is it?  Single 16 inch fan seems very small etc.  

I worked on a ducted fan supercar. The idea was that on the road you didn't run it, and on the track you switched it on. I was using two fans. The ducting is ENORMOUS. Never went anywhere. The files are somewhere in the bit bucket, but yahoo has kept the discussion.

The 2J's fan was powered by a 250cc twin cylinder snowmobile engine rated at a nominal 40bhp, so that gives a sense of what is needed to usefully evacuate a skirted undercar. And yes, a 40bhp driven fan will need some pretty big ductwork I'd imagine to handle the flow without blockage. The math to calculate it should be straightforward enough.

I have a suspicion that Gordon Murray has this covered.

https://newatlas.com...68f9d8-90270322

Some interesting stuff on the 12,000 rpm Gordon Murray Cosworth V12. Does idle - 12,000 rpm in 0.3 seconds.

Not much flywheel then. You might want more on a street car.

gg - I would class the Honda S2000 as being pretty much a "race engine" on the road. More than any other factor a "race engine" differs from an "road" engine in its cam timing. The S2000 has in its upper cam VTEC timing mode a duration that is distinctly "race" - thus I don't think it would be fair to compare it to an "road" engine with a much milder cam. I would imagine that the Cossie V12 probably has a cam duration even longer than the upper range of the VTEC. I don't see how it could be possibly be driven on the road. If your Granny doesn't mind an extremely rough 3,000RPM idle, no power and rough running below about 6,000RPM, just about impossible to get moving from a standstill without stalling etc. - good luck to her. What an engine like the V12 needs is a VTEC-type system or (dare I mention it) a Helical Cam. Much as I dislike turbo engines - if you really want 1000BHP on the road - turbo is the answer.
 

Any engine with variable cam timing is not a race engine! I'd be surprised if the Valkyrie doesn't use some sort of variable cam timing

I wonder why variable cam timing is not permitted in the F1 rules? Perhaps they only want teams to use "race engines".

@KC - from the link to the Gordon Murray Cosworth. https://newatlas.com...68f9d8-90270322

"The resulting 3.9-liter, naturally aspirated V12 delivers a peak of 654 horsepower at 11,500 rpm. Maximum torque is 467 Nm (344 lb-ft) at 9,000 rpm, but true to the flexibility mandate, it makes at least 332 Nm (245 lb-ft) of twisting force from as low as 2,500 rpm. You won't have to rev it like a goon to get away at the lights."

There are also many examples of road motorcycle engines that are very docile at low revs yet pull to ridiculous revs.

Edited by gruntguru, 23 July 2020 - 21:28.

the fan looks to work and boost existing aerodynamic ground effect designs unlike on the brabham bt46 which has the entire floor sealed and then negative pressure is by fan. the GMA T.50 will run a 48v electrical system entirely to provide as much power to operate its ground effect fan..the fan is also used for cooling

Nice post Pierre.

The pressure plots don't reveal much. If you analyse them in terms of pressure on upper and lower surfaces of the car, you would say it has more downforce with the fan off. The only positive is better flow attachment to both upper and lower surfaces.

The airfoil is not shown - what is the effect of the fan on it?

Looks like a model with not very good similarity to the car itself.

Edited by gruntguru, 29 July 2020 - 05:47.

Per the Colorful Fancy Diagram, the fan doesn't seem to do much in terms of pressures. I think the seriousness of a fan-concept car can be pretty easily determined by how much power it can absorb, something we don't know here.

Aston Martin Valkyie exploits the y-250 vortex?