The Effects of Density Altitude in Racing

Density Altitude is a way to describe the ambient air density (the amount of air molecules per volume of air) and relate it to the altitude where that density would be found in a “normal” atmosphere. This sounds pretty technical, but think of it as a way to standardize how we measure air density, specifically for performance calculations. In racing, the density altitude affects the power output by the engine, its cooling, and also the aerodynamic drag on the car. Continue reading

Everything You've Ever Wanted to Know about Zulu Time

Zulu time, also known as Coordinated Universal Time (UTC), is a standard time reference used in aviation, military, and other industries around the world. The history of Zulu time can be traced back to the development of modern timekeeping methods in the 19th century. In the early days of navigation, sailors used local time to determine their position at sea. However, this method proved to be unreliable due to the fact that each location had its own unique time zone, and the differences in time between locations could be difficult to calculate accurately. Continue reading

Weather Apps and Privacy

Thanks to Apple’s recent rule changes on the App Store, app developers must disclose if they collect and/or share your location data and other information. Have you ever looked at the privacy disclosures for your favorite weather apps? If not, you may be in for an eye-opening experience. Many Popular Weather Apps Track and Sell your Location Data and More Here is an example from one of the most popular weather apps on the App Store. Continue reading

Instantly Find the Density Altitude (And Much More)

Density Altitude affects everything from the power an engine can make, the lift of a wing, the flight of a golfball or the bite of a propeller. For racers, the ideal jetting of the carburetor is highly dependent on DA. It can easily mean the difference of a being on or off the podium. For pilots, Density Altitude is even more crucial as it can determine whether an aircraft can safely take off from a given airfield or bush strip. Continue reading

Zulu Time: Using the New Timer Features in the Apple Watch, iPhone and iPad App

The Apple Watch version of our app Zulu Time Widget GMT/UTC has incorporated a timer feature with a wide range of functions for over a year now. Some of these features were inspired by feedback from customers who work in space flight, others by flight instructors, yet others by airline captains. All the great timer features from the Watch version of the app are now also available on the iPhone and iPad. Continue reading

Rate of Climb Founder Interview

Interview with Kristian Ljungkvist, Founder of Rate of Climb Industries Hi there, great to speak with you today. Could you tell me about how you ended up starting your own app development company? Yes, well I’ve worked in the software industry since the early 1990’s. I started out developing Windows applications, then web-based applications for various companies. When the iPhone came out I was super excited! Ever since I was a kid hacking on my Commodore 64 I’d dreamt of having a computer I could carry in my pocket, and here it was! Continue reading