calculate Density Altitude

[charlylima]

I would like to suggest that the app calculates and shows density altitude next to the Weather data.

Is your feature request related to a problem? Please describe. As a Pilot you should calculate Density Altitude before flight to decide if the runway length is sufficient for a safe takeoff. It might be that in the morning when it is still cold from the night, you can easily start from a runway in the alps, later on a sunny day with high temperate it is getting critical because the engine is loosing power with increased temperature and lower density altitude. It is often surprising for pilots when you got used to the weaker engine power in summer and then start on a cold day how much better it performs. So to do a good flight preparation you would have to calculate density altitude and estimate the takeoff distance using the tables in the aircrafts manual. But in reality, calculating Density Altitude manually is too much effort, Hobby Pilots often dont do it.

Describe the solution you'd like The App should calculate Density Altitude, based on Elevation, QNH and Temperature. It could show it below METAR data.

Describe alternatives you've considered Alternatives:

• Manually extract weather data from Enroute and input it into a web based density altitude calculator
• Write an extra app for flight preparation. It would also need to download METAR data and have the elevation data of the airfields.
• Add the functionality to calc Density Altitude to Metaf Library and then add it to Enroute

Additional context A good explanation of the formulas is on this page: https://aerotoolbox.com/density-altitude/

It could look like this:

What do you think? And where would you add it in the UI?

My branch, first try: https://github.com/charlylima/enroute/tree/feature/densityAltitude