Support for imperial units #15
Description
Currently, the SI unit system and the yard-pound system are mixed. Change the handling of these so that they can be flexibly switched between the different units.
- Distance: toggle between meters and yards
- Mass: toggle between grains and grams
- Diameter: toggle between inches and millimeters
- Velocity: toggle between fps and mps
- Altitude: toggle between feet and meters
- Wind Speed: toggle between mps, mph and knots
- Energy: toggle between joules and ft-lbs