RE: How do you solve a problem like Evija

RE: How do you solve a problem like Evija

Author
Discussion

mwstewart

7,554 posts

187 months

Tuesday 30th July 2019
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oilit said:
tr3a said:


This picture, with middle-aged men in blue and grey suits around a wildly overpriced, look-at-me EV, turns me off. It makes me yearn for a Tesla even more than before.
Oh come on - in a nod to metoo they do have a token caucasian woman hidden at the back - seriously I agree this image makes me think they are dinosaurs - but this is what happens when the Asian corporate culture bumps into the west.

wtf !


Edited by oilit on Thursday 25th July 07:04
Age tends to bring experience and better judgement. It should be more respected in the west IMO.

PantsFire

519 posts

79 months

Tuesday 30th July 2019
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If they pocket that money then make a £100k Evora that looks 90% like the Evija I'm sold, I think it's the best looking car ever, period.

PS2018

323 posts

72 months

Wednesday 31st July 2019
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I’m sure this has been mentioned already but if this Evija can do 0-186 in 9 seconds are we starting to get to levels of acceleration that are actually uncomfortable to experience?
I’d certainly love to try it- from the drivers seat- but in the passenger seat I’m not so sure


John145

2,447 posts

155 months

Wednesday 31st July 2019
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PS2018 said:
I’m sure this has been mentioned already but if this Evija can do 0-186 in 9 seconds are we starting to get to levels of acceleration that are actually uncomfortable to experience?
I’d certainly love to try it- from the drivers seat- but in the passenger seat I’m not so sure
0.95g average acceleration for 9 seconds, shouldn't be anything painful in that especially as your body and head is supported by the seat. I rather enjoy the sensation of 1g acceleration.

Lateral and deceleration at these high levels gets tiring though, especially as a passenger.

CABC

5,533 posts

100 months

Wednesday 31st July 2019
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PS2018 said:
I’m sure this has been mentioned already but if this Evija can do 0-186 in 9 seconds are we starting to get to levels of acceleration that are actually uncomfortable to experience?
I’d certainly love to try it- from the drivers seat- but in the passenger seat I’m not so sure
i'm *guessing* the ballistic mode is 5 - 80mph and then eases, of feeling of acceleration eases.
a airplane doesn't seem that fast either, yet once it's at 60mph (relatively slow to do so) it starts to take off, so to speak, but doesn't feel like it.
physicists will provide the maths..

Oilchange

8,421 posts

259 months

Wednesday 31st July 2019
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Having all this power sounds amazing but it’ll be limited by tyres and the odd tree on the corner that you wont make so largely pointless in the real world.
Nevertheless, I do love the thing for all it’s excessiveness and beautiful is an understatement, so much a product of a company that always seems to design gorgeous cars.

LG9k

443 posts

221 months

Wednesday 31st July 2019
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I recently went to a theme park in California (Six Flags Magic Mountain).

The "Superman" ride there does 0-100 in 7 secs or so, with a peak acceleration of 4.5g, 6 seconds of weightlessness and all over in less than 30 seconds.

It cost a few dollars for the day, much better value for money than this Lotus biggrin

https://en.wikipedia.org/wiki/Superman:_Escape_fro...

otolith

55,899 posts

203 months

Wednesday 31st July 2019
quotequote all
CABC said:
PS2018 said:
I’m sure this has been mentioned already but if this Evija can do 0-186 in 9 seconds are we starting to get to levels of acceleration that are actually uncomfortable to experience?
I’d certainly love to try it- from the drivers seat- but in the passenger seat I’m not so sure
i'm *guessing* the ballistic mode is 5 - 80mph and then eases, of feeling of acceleration eases.
a airplane doesn't seem that fast either, yet once it's at 60mph (relatively slow to do so) it starts to take off, so to speak, but doesn't feel like it.
physicists will provide the maths..
I think it's going to feel like a Tesla in ludicrous mode well into three figures. With 2000bhp it's going to be traction limited to very high speeds.

The thing with passenger jets is that they just keep relentlessly accelerating down the runway. They've only got to get to 150 or so and they have a long way in which to do it. Take offs from short runways like Funchal are interesting...

PS2018

323 posts

72 months

Wednesday 31st July 2019
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Interesting. So at what point do we think (current) tyre technology can cope? If this Evija could do let’s say 0-186 in 8 seconds, or 7 seconds, what is the mathematics on where the tyres wouldn’t cooperate anymore?

otolith

55,899 posts

203 months

Wednesday 31st July 2019
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PS2018 said:
Interesting. So at what point do we think (current) tyre technology can cope? If this Evija could do let’s say 0-186 in 8 seconds, or 7 seconds, what is the mathematics on where the tyres wouldn’t cooperate anymore?
186 in 9 seconds is averaging 0.93g. A Tesla Model S averages 1.18g from 0-60.

I wouldn't like to guess what the acceleration profile of this thing will be, because it's got massive power, a massive power to weight ratio, and it's also likely to have significant aero which will increase with speed. It's also going to have drag, but because the aero is active, who knows how much.

Sticky tyres will pull in excess of 1.2g, but once you add downforce to that, you multiply it. If you had enough power and grip to pull 1.2g to 186, you'd do it in ~ 7 seconds.

PS2018

323 posts

72 months

Wednesday 31st July 2019
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Thanks @otolith. Interesting.
So you are saying that current tyre tech on a car like this means 0-186 in 7 seconds is in theory possible. Quicker than that and tyres become the limiting factor.


otolith

55,899 posts

203 months

Wednesday 31st July 2019
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Yep, roughly. There are tyres with more grip than that (drag tyres for example), but for a high end street tyre I'd say that's about it.

RobDickinson

31,343 posts

253 months

Wednesday 31st July 2019
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That's without down force though just mechanical grip

otolith

55,899 posts

203 months

Wednesday 31st July 2019
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RobDickinson said:
That's without down force though just mechanical grip
Indeed, though at the speeds where significant downforce is generated, in a high downforce/high drag car, you’d need an awful lot of power to be pulling much more.

PS2018

323 posts

72 months

Thursday 1st August 2019
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This is not my area of specialty but the more downforce you add, the more you are asking the tyres - tyre walls? to cope with too?

otolith

55,899 posts

203 months

Thursday 1st August 2019
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There is that. They’d need to be up to it, but then there are tyres which will deal with the 2000kg, 260mph Chiron - the tyre doesn’t know whether it’s being squished by 1600kg of mass and 400kg of downforce or 2000kg of mass.

PS2018

323 posts

72 months

Thursday 1st August 2019
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That’s a good point. So would the Chiron tyres would cope with a 0-186mph in 7 seconds if it were the case it had that performance? (In reality I think it’s a tardy 13 seconds or so)
I guess these are the kind of tyres/similar that Lotus will stick on the Evija

otolith

55,899 posts

203 months

Thursday 1st August 2019
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Probably slightly different requirements, less weight, active aero, don't know what the top speed will be, but yeah, I expect it will also get something bespoke.