HEMI - Powered schrieb:
Hans Holbein added these comments in the current discussion du
jour ...

Beats me, I was making a joke. Since airplanes use nautical
miles, I thought maybe a cycle powered by a radial aircraft
engine might also. As to range, don't know how many
gallons/hour one of those old radials might consume.

On my combat simulator program (Sturmovik) I can choose Kmh, mph
or KIAS. Are nautical miles base for the latter?
I think it can mean knots indicated airspeed but am not sure
about it.

Had to Google KIAS, Knots Indicated Air Speed. I would say, yes,
nautical miles or knots would be the unit for this. Since I am not a
pilot nor do I play simulation games, I don't know if the one you
refer to differentiates between ground speed and indicated air speed
but whether it is in statute miles/hour or nautical miles/hour or
knots I don't know.

Im no pilot neither.

Im still learning all the things needed to go online for combat with
other weirdos. ;-)

The usual airspeed indicator is a tube on some undisturbed place at the
aircraft, the pitot-tube.
With lesser air pressure at increasing height you need more speed to
induce the pressure in this tube to indacate the airspeed.
So indacated airspeed IAS differs from true airspeed TAS which means the
speed realtively to the surface.
With no wind influence, as I recall the fomula is
TAS=IASx(1+ Heightx0,02/300)
But I might have forgotten something.
Its ~8% pus in 3000ft and ~44% in 20000ft
If I'm correct, in 20000ft you fly 540knots while your indicator shows
only 375knots.

Im not very comfortable with the anglo-saxon systems, but over a long
term I think the metric system will do the race.
Resistance is futile!
SCNR