RE: Aston Martin Rapide E details
Discussion
Mackofthejungle said:
The technology was about the same. These are just electric motors and batteries - it's as basic as it gets. Sticking a TV inside it does not make it the future.
Yes, because today’s Lithium Ion batteries are literally just like the Lead Acid ones they had in the 70s and the microprocessor contorolled battery management systems that were 1,000,000 times more powerful than the moon landing computers were already in production. Basically it’s just government oil conspiracies that kept them back....RacerMike said:
Mackofthejungle said:
The technology was about the same. These are just electric motors and batteries - it's as basic as it gets. Sticking a TV inside it does not make it the future.
Yes, because today’s Lithium Ion batteries are literally just like the Lead Acid ones they had in the 70s and the microprocessor contorolled battery management systems that were 1,000,000 times more powerful than the moon landing computers were already in production. Basically it’s just government oil conspiracies that kept them back....RobDickinson said:
Not true, rimac have in their latest car no batteries where you sit, really well packaged.
Tbh the skateboard layout is fine for most cars though, who knows with the new Tesla roasster
Is the Rimac in a front engined gt layout though? I thought they were in the classical mid engined mould. I'm not sure that the example you have provided has disproved the point that was made but I'm happy to learn otherwise if it does. Tbh the skateboard layout is fine for most cars though, who knows with the new Tesla roasster
RobDickinson said:
Where the engine might have been is pretty irrelevant...
It is far from irrelevant as electric cars still follow the forms of established ICE cars, be it front engined or mid engined. The Rimac, being in a typical mid engined layout, can use up the majority of the available space behind the passenger cell for the batteries as it doesn't have to concern itself with a) rear seat passengers and b) any boot space at the rear of the car. A GT car would certainly have to provide for one, if not both of these requirements. This is the battery of the Rimac concept 2;
Works perfectly in its given application as the weight has been maintained within the cars wheelbase and has no effect on the passenger space.
Now this Aston doesn't have any batteries under the passenger compartment either, it is essentially the same as the Rimac's reversed, but in doing so, and in keeping it's passenger and boot space intact, has had to resort to moving a considerable amount of the battery to the very front of the car which, as Max Torque has pointed out, is far from ideal.
I do feel as if I am just repeating what Max Torque has already pointed out to be honest.
Where would you suggest that a clean sheet design for a four seat GT car would move the batteries to if not under the passengers or thrown over the front axle?
The Rimac just isn't a valid comparison I'm afraid.
Max_Torque said:
The pictures in this article are of the prototype demonstrator, and not the actual production model. To avoid issues with crash re-cert, the ePowertain is a direct, mount-for-mount swap for the ICE one! ie the battery and motor are hung, just like the V12 and gearbox off four "soft" mounts, 2 front, 2 rear. The 'battery' with modules housed in a carbon fibre backbone box fills the entire front, middle and most of the back of the vehicle, and the motors are hung off the back of the battery pack and drive the rear wheels!
Pictures on AndyP's twitter feed:
The layout is a total nightmare in terms of design, build and packaging, but is the only way to cram enough range into a car not designed to take an EV architecture, without a complete tear up of the BIW!
Waw, thanks for that, fantastic to see how they've managed to squeeze everything in and get around the regs!Pictures on AndyP's twitter feed:
The layout is a total nightmare in terms of design, build and packaging, but is the only way to cram enough range into a car not designed to take an EV architecture, without a complete tear up of the BIW!
RobDickinson said:
Where the engine might have been is pretty irrelevant...
But where the centre of mass is located IS very relevant to how your car feels dynamically. Aston's entire history and niche is large, front engined GT cars. These trade ultimate performance for benign road manners. By using a rear gearbox linked with a rigid torque tube to a front engine, they try to get the best compromise of traction and handling, and the high polar moment of inertia of that layout brings a very stable dynamic envelope.A "mid engined" Aston, be that an actual engine in the middle or a large battery isn't (yet) part of their core niche.....
Max_Torque said:
RobDickinson said:
Where the engine might have been is pretty irrelevant...
But where the centre of mass is located IS very relevant to how your car feels dynamically. Aston's entire history and niche is large, front engined GT cars. These trade ultimate performance for benign road manners. By using a rear gearbox linked with a rigid torque tube to a front engine, they try to get the best compromise of traction and handling, and the high polar moment of inertia of that layout brings a very stable dynamic envelope.A "mid engined" Aston, be that an actual engine in the middle or a large battery isn't (yet) part of their core niche.....
So regardless where the weight is distributed it could be an utter tank for all we know, making the distribution of weight very much secondary.
julian64 said:
As I asked some way back none of this is an important as its weight. Having searched all over I can't find a single all up weight reported.
So regardless where the weight is distributed it could be an utter tank for all we know, making the distribution of weight very much secondary.
sorry to be contrary, but i disagree!So regardless where the weight is distributed it could be an utter tank for all we know, making the distribution of weight very much secondary.
Astons are not lightweight, never have been. Modern tech can to a large degree disguise mass, but what you can't do is disguise the cars ultimate distribution of that mass.
(actually, thanks to technologies like rear wheel steering, you can also start to disguise the mass distribution, but eventually it catches up with you)
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