Six if it is sideways.

Batteries under the flat floor. This is suitable for EV conversion. The battery can also run whatever you want the van to do.

First thing i thought of when I saw the flat floor. Battery pack.

Just to be clear.

That is why we measure its mass and not its weight.

While I get your point, I still believe you are way off.

I have never built anything like this, and I am not an automotive or general mechanical engineer. But common sense tells me:

Aliens actually wanted to exterminate the human race back in the late 70'.

“urban defensive cycling”

I have friends who work for Ford, and they say that they do twice as many engine rebuilds and replacements as they do at Kia and Hyundai. Twice, can you imagine!

Your government has set up procedures to control whistle blowing.

Thank you for your correction. (Is this correct?)

(Your are using the wrong word “principals”, I think it should be “principles” but I get your meaning.)

We will not see self driving cars in regular traffic in this century.

Not saying it will be easy, to begin with, but do remember that you can effortlessly travel around the world in a heavier than air machine due to material sciences.

“our own space station”

So let me get this straight.

Nothing that cannot be solved by mass.

This is a great example for why we need feet and hands on the ground.

Where is Mr Willis when we need him.