On Jun 19, 3:16*pm, "BDS" wrote:
"Le Chaud Lapin" wrote

[I am an electrical engineer]

Don't take this wrong but do you have any practical experience?

About average.

[simple diode fixes the problem.]

Not necessarily.

[My first thought when hearing stories like this is...."that engineer
should have known that."]

My first thought is "the engineers probably knew this, so why didn't they
use a diode?"

Good question. I would be curious to hear what the engineer
responsible for employing the diode has to say.

[Sometimes this does not happen,
and the result is a missing diode because s/he did not think about
kickback induction, something would immediately come to mind of
experienced, bright, electrical engineer.]

Right, and we all know that the auto manufacturers do not have any
experienced and bright electrical engineers.

Well, certainly they have enough to know when to employ a 10-cent
diode to prevent massive recall 1000's of vehicles.

[If you had told a mother of 3 that, in the year 1700, she would be
flying at 10,000 meters, in a machine pressurized with air, at 500kts,
propelled by two devices that burn a combustible liquid at
temperatures exceeding 4000F....snip......she might reasonably claim
that the whole idea is just too risky]

Well of course she would - that didn't become possible until the 1960s...

Which is the crux of the question:

What makes something possible in the future, but not the present?

-Le Chaud Lapin-