One thing I maybe should add to the doc is that the order of operation is
always:
1. scale (multiplication)
2. offset (addition)
3. truncate (truncation)
This will matter when, for instance, converting from Fahrenheit to Celsius.
The normal formula is C = (F - 32) * 0.55555556. The operator precedence
above requires a new formula, C = (F * 0.555555556) - 17.777777777.
controls in the cockpit vs. which wheels they apply to. FlightGear now
sets /controls/gear/brake-left, /controls/gear/brake-right, and
/controls/gear/brake-parking. It should be up to the FDM to sort out
which wheels under which circumstances are affected by these controls
and ultimately what happens to the physical motion of the aircraft.
