Interesting Aerodynamic Cars (Mike Vetter's ETV, also Avion)

[aerohead]

yeah,there's no extant wind tunnel or CFD data to suggest that the air could possibly remain attached to that upswept contour.
I don't know how they turn the front wheels,while experiencing a bump,and not tear the front fenders off the car either.

[freebeard]

Possibly the whole pontoon is hinged at the rear?



It's also possible that there is enough plan taper in the underside to allow the steeper slope? Or would that have it backward.

I trimmed the video title, but I think this was an early study for the Edison2:

[aerohead]

Originally Posted by freebeard

Possibly the whole pontoon is hinged at the rear?



It's also possible that there is enough plan taper in the underside to allow the steeper slope? Or would that have it backward.

I trimmed the video title, but I think this was an early study for the Edison2:

*I don't see any evidence that R-R could turn its front wheels.Even if vertical displacement is accommodated by a telescopic strut on the inside of the wheel and hidden within the fairing,they've given no facility for wheel flop,especially during a coincident vertical displacement without it colliding with the fender.The whole assembly would have to center pivot like a Soapbox Derby car,and there's no fore or aft clearance from the body to allow that kind of movement.

I suspect that there isn't even a powerplant in the car.Just a glider,static display.
*As to the diffuser,we know that 2.5-4-degrees is best for low drag.Above 11-degrees,all streamlining benefit is lost completely.As an inverted wing section,at this kind of angle of attack,the lower face would be beyond burble point,and into full stall.

What is shown will produce strong delta-wing vortices,like the Concorde or Space Shuttle used for crucial lift.(downforce in this case [ induced drag])
If the cars were capable of high speeds,these dirty diffusers would help them during cornering and prevent aquaplaning.

[NeilBlanchard]

If anything, there could be electric hub motors in the RR? Or, chain drive in the rear.

[aerohead]

yeah,seems like they did the minimum beyond just pushing the thing,to get some dynamics for the video shoot.Straight-line,no bumps.
(the secret is hiding in plain view)
Maybe that's all 1%-ers need for excitement.

[freebeard]

“As the Rolls-Royce Vision Next 100 gracefully comes to a halt, something magnificent occurs,” the company said. The glass roof rises to allow the occupant to stand, while a step emerges from below the running board and a red light is projected, “carpet-like” to announce their arrival.

“Thus, as in Botticelli’s ‘Birth of Venus’, our guest is framed and ready to step gracefully into the limelight and greet their audience … This is automotive haute couture,” the company added.

Amid the fanfare accompanying its unveiling, Rolls-Royce did not say how the vehicle, due to hit the streets in the 2040s, would be powered or how it would cope with speed bumps.

https://www.theguardian.com/business...ision-next-100

Trailer queen. But I think a dropped and inverted I-beam axle with 'split wishbone' arms pivoting on the top of the cowl could work. But it would need Edison2 inwheel steering to remove the steering knuckle from the airstream.

Enough pictures on Jalopnik to make you gag:

The Rolls-Royce 103EX Is A Bizarre Retro Gaze Into A Square-Wheeled Future*

[kach22i]

Originally Posted by NeilBlanchard

If anything, there could be electric hub motors in the RR? Or, chain drive in the rear.

The "Electric Drive" mentioned in the video could also be an electric pump for hydraulic drive. Several of the proposed small airplanes which convert into automobiles feature such systems. Not the most efficient way to go, but as these creations are more aircraft than car they get a pass - I guess.

The Rolls-Royce 103EX Is A Bizarre Retro Gaze Into A Square-Wheeled Future


I was imagining four wheel steering which could lessen the protruding angle of the turn radius for each wheel. However the snippets above seem to indicate front turning wheels only - despite the similarities fore and aft in the wheel arch configurations and detailing.

Lots of smoke and mirrors, but that's what a far fetched concept is all about, use your imagination to fill in the blanks - have some fun with it.

As mentioned by others, the vertical travel of the wheel would be near zero. Meaning the wheel spokes themselves would have to accommodate the shock absorption and travel. We have seen such wheels proposed in Popular Mechanics, Popular Science and for the run flat military for decades now.

One recent example:
http://jalwah.blogspot.com/2010/12/f...wheel-car.html

[aerohead]

Originally Posted by freebeard

https://www.theguardian.com/business...ision-next-100

Trailer queen. But I think a dropped and inverted I-beam axle with 'split wishbone' arms pivoting on the top of the cowl could work. But it would need Edison2 inwheel steering to remove the steering knuckle from the airstream.

Enough pictures on Jalopnik to make you gag:

The Rolls-Royce 103EX Is A Bizarre Retro Gaze Into A Square-Wheeled Future*

The Edison II front architecture would be the way for them to go.They'd lose some of the aesthetics,but at least the car would be driveable.

[samwichse]

Originally Posted by aerohead

The Edison II front architecture would be the way for them to go.They'd lose some of the aesthetics,but at least the car would be driveable.

Speaking of... they came out with some lovely renderings of their next gen VLC, then their blog hasn't been updated since 2013. Is Edison2 dead? Gone the way of Aptera (and soon to be Elio, I'm guessing)?

[aerohead]

Originally Posted by samwichse

Speaking of... they came out with some lovely renderings of their next gen VLC, then their blog hasn't been updated since 2013. Is Edison2 dead? Gone the way of Aptera (and soon to be Elio, I'm guessing)?

I think that if they aren't,it won't be long.
$150,000,000 and what crowd-sourcing Aptera could get wasn't enough capital to develop,manufacture,market,provide parts and labor support,make payroll,rent,insurance,government regulations,etc.,which are fixed costs for a manufacturer.
Tesla is losing $15,000 on every car they sell and the only income they get is from selling pollution trading credits to other corporations,which will all change very soon,when they all dump their EV 'compliance cars',as Bob Lutz has referred to them,on the market; and Tesla loses this profitable 'market.'
One might be looking at a minimum of $3,000,000,000 cash,to be able to successfully launch a single car.
Here's a little article about Aptera