teardrop shaped cars for lower drag.

D: this is post WWII car that used a 10hp moped motor initially.
The rear axle is recessed. This
1) saves much weight
2) improves drag profile
3) means no differential drive is needed.
I'd like to see this updated. Every now and then, a 3-wheeled car comes out.
See the Trimagnum for example. 3 wheels are not quite as stable.
It also requires carefully designing the car to keep the mass low and between the tires.
We've all seen the Prius drag profile. That is about as good as it gets- if we are trapped with the 'box on wheels' design. It cannot taper horizontally at the rear.
Aside: many cars that look low drag are not. Without a big spoiler, the rear window on most sedans ends laminar flow and has the eddies/vortex of turbulence.
Ideally, the rear cross section before turbulence should be 1/2 the front.
I propose:
1) we switch from box on wheels. i.e. 2 bucket seats front/ 3 on sofa rear.
2) at first, we switch to 2 and 2.
3) then 2 and 1/ or 2 kids.
I would also like to see:
1) electric motors mounted on the front wheels. For regenerative braking.
2) an axle rear mounted engine. BUT place the whole narrow rear axle on a pivot.
The result? The ability to move SIDEWAYS for parallel parking.
As well as very narrow turn radius.
The Isetta-style rear axle allows the wheels to pass under the rear passenger seats.

I thought this would work for highway commutes.
For in the city, a Vive-style profile is adequate. Or SmartCar.

The 3-wheeler died when Buckminster's 3 wheeler crashed and caused a fatality.
People are irrationally afraid of it in the same way the Hindenberg crash scared them of hydrogen.
Perhaps we can use a 'boiled frog' approach to sneak it up on them though...