[FT] Orbit and FT ( + added trivia)

FWIW,

As a bit of trivia (and not directed at the original point of this thread),
the Harrier would only be able to sustain a hover over the pole (or any other
spot) for a few seconds. Under a minute, max.

The heat generated by the Harrier's engine is extreme while hovering (and
not having high-speed airflow to cool it down - as it has while the
aircraft is in flight), so it uses water injection to help stop things from
overheating (and melting). The water tank on a Harrier is relatively small,
and allows a very limited hover duration.

> Just look at the Harrier II...