[lojban-beginners] How long can we stay aloft?

[Cortesi <dcortesi@mindspring.com>]

Trying to translate the question

How long can/will we stay aloft?

Perhaps it is being asked by a pilot, of a flight engineer.
Or by a passenger in a hot-air balloon of its pilot.

Where I've gotten so far:

	zu'o ma'a stali le tsani kei

		the activity of us-all remaining in the sky

	zu'o ma'a vofli kei

		the activity of us-all flying

	le nu ma'a ru'i vofli kei

		the event of us continuatively flying

Whichever, I want to ask, how long does that continue?

temci is no good because its place structure is x1=duration,
x2=start, x3=end; there's no place in it for the activity phrase.

The only alternative I see is renvi,

	zu'o ma'a stali le tsani kei renvi te ma

		(activity) survives/endures for x3 duration what?

Seems a bit dramatic; but other time gismu are specific as to units,
cacra=hours, djedi=days, etc. I don't want to force
an answer specifically in hours, e.g.

	le nu ma'a ru'i vofli kei cacra ma

but rather a general "how long?"

Any suggestions?

Thanks,
	Dave Cortesi