Units of distance travelled per hour

[Derek Warner]

Paddledudcks - a little bemused with comment to date - my little book on
Paddlers of the Australian waterways note speed in "knots" - yes the Oxford
concise confirmed the definition to me as I had acknowledged

I have always remembered that I walk at about 4 miles per hour, however this
is quite different to "knots" and so my understanding of my speed of walking
has little bearing in comparing that to an actual nautical mile per hour or
scale portions for a model

Pray tell, how are we to try & establish scale speeds without understanding
actuals or conversions?

I would be far more interested if a fellow paddler came back & suggested
that a scale unit of xxxxxxxxxxxxxx should be the qube root of the actual -
and not the square etc, rather than talk of egg timers (which to my
understanding have yet to be defined as imperial or metric) - Derek

[HBelflower]

Derek,

I believe that what David was saying is that there is no such thing as
"knots per hour." A nautical mile per hour is a knot. Period. That's it.
No miles or meters connected to that term. If you walk at four miles per
hour, you are walking at about 3.5+ or so knots. In rough measurements. A
Knot is equal to about 1,125 or 1 1/8 miles. The unit is derived from the
length of one second of longitude at the earth's equator.

While it is true that a ship that is traveling at 4 knots would travel four
nautical miles in an hour, we do not say that it is traveling at four knots
per hour. Simply four knots.

Regards,

Harry B.

[Dallinson]

Derek.
Don't be bemused by knots!!! Just walk 3.476 knots instead of 4 miles per
hour!!
4 X 1760 / 2025 = 3.476.

Incidentally my dictionary defines a "knot", and I quote "Unit of speed used
by ships and aircraft, equal to one nautical mile per hour" .

The rest of the mathematics, as to whether it is a square root or a cube
root, is quite beyond me, that is why I applauded your input. I just threw
in my twopennyworth about the definition of the knot!!

Keep up the good work regarding the scaling of the models!! I find it very
interesting, but regret that I am unable to contribute to the maths.
Regards
David

[Derek Warner]

Harry/David

Thank you & I acknowledge your correction - I should not have refered to
the unit "knot" as qualified (per hour), however simply restate we must
understand the relationship between "knots" and speed or distance travelled
per unit ("hour" or "minute") speed?

Again as noted I am more interested in understanding the scale calculations
etc

regards Derek