FlyBy E6B aviation calculator by SkyWriter Software:
FlyBy E6B is an essential flight computer application for all pilots. Designed by a professional airline pilot it includes many features not found in other E6B programs. 
Always improving: 
FlyBy E6B was one of the very first applications of its kind published for the Palm OS. Used by thousands of pilots the world over, it has evolved from the suggestions and feedback we have received. 
FlyBy E6B Features: 
Airspeed Calculations: 
- True Airspeed using Calibrated Airspeed 
- True Airspeed using Mach# 
- Calibrated Airspeed using TAS 
- IAS Using MACH# 
- Equivalent Airspeed using CAS 
- Mach# Using TAS 
- Mach Crossover Altitude
- Planned MACH#
- Planned TAS
Wind Calculation: 
- Find Wind Direction and Speed 
- Find Wind Component (headwind and crosswind) 
Heading and Ground Speed: 
- Find Heading, Ground Speed, ETE and Fuel Burned 
Compass Heading:
- Find Compass Heading using True Heading, Magnetic Variation and Deviation
Time-Speed-Distance: 
- Find Estimated Time Enroute 
- Find Ground Speed 
- Find Distance 
- Find Fuel Time 
- Find Fuel Flow 
- Find Fuel Burned 
- Find Estimated Time of Arrival 
- Fixed GroundSpeed (Find required TAS given a Track, Groundspeed, and wind)
Altitude Calculations: 
- Density Altitude 
- Pressure Altitude 
- True Altitude 
- Cold Temperature Approach Altitude Correction 
Vertical Navigation Calculations: 
- Distance and Time using Altitude Change, Ground Speed, Vertical Speed 
- Rate of Descent using Altitude Change, Ground Speed, Distance 
- Rate of Descent using Altitude Change, Ground Speed, Descent Angle 
- Feet/Nm using Vertical Speed, Ground Speed 
- Feet/Nm (%) using Gradient %, Ground Speed 
- Rate of Climb using Required Climb Gradient and Ground Speed 
- SCDA (Constant Descent Angle) 
- VDP (Visual Descent Point) 
- VPA (Vertical Path Angle) Deviation
Navigation Calculations: 
- Critical Point 
- Point of No Return 
- Time to Minimum Descent Altitude 
- Navigation Track and Distance between two points with plotted map view
- Rate One Turn 
- Radius of Turn 
- Turning Stall Speed 
- DME Arc
Conversions: 
- Distance: 
Nautical Miles/ Knots 
Statute Miles/ Mph 
Kilometers/ Kph 
Feet 
Meters 
Meters/Second 
Feet/Second
- Volume: 
US Gallons 
Imperial Gallons 
Liters 
- Temperature: 
Celsius 
Fahrenheit 
- Weight: 
Pounds 
Kilograms 
- Altimeter: 
Inches Hg 
Millibars/Hectopascals 
mmHg 
- Fuel, Temperature Corrected, JetA, JetB, AvGas: 
US Gallons 
Imperial Gallons 
Liters 
Pounds 
Kilograms 
- QFE/QNH airfield altitude conversion 
- DMS/D-M.m/DM.m and D.d coordinate conversion
- VNAV
Gradient %
Feet per NM
Angle
Weather: 
- Relative Humidity, Heat Index, Cumulus cloud base, Wind Chill 
- NOAA METAR and TAF aviation weather access 
Other Functions: 
- Linear Interpolation 
- Minimum Floor Load Limit (Cargo) 
- Maximum Cargo Weight
- Runway Slope
- Sunrise/Sunset plus sun Azimuth and Elevation