SkyReady 107: A Study App for the Drone Pilot Exam, and the Physics It Teaches
Flying a drone commercially in the United States requires an FAA Remote Pilot certificate under Part 107, which means passing a knowledge test on airspace, weather, regulations, and aircraft performance. SkyReady 107 is a study app for that test, built around short lessons, immediate feedback, and spaced repetition on the questions you miss.
The app
SkyReady is a static web app with no build step and no server. It installs to a phone's home screen, works offline through a service worker, and stores progress on the device. The course has 12 units and 207 questions in six formats, a 57-term glossary, and a mock exam that mirrors the real one: 60 questions, a 120-minute timer, and 70 percent to pass.
Every answer cites its source in the federal regulations, the Aeronautical Information Manual, or an FAA handbook. Study material for a regulated exam is only useful if it is correct, so the questions were written in September 2026 and checked one by one against current rules in October. That review found no question with a wrong answer and led to several corrected explanations, including a forecast-code example and a traffic-pattern detail updated in a recent change to the AIM.
The physics underneath
The performance unit is where the exam stops being memorization. In a level turn the wings tilt, and lift tilts with them. Only the vertical part of lift holds the aircraft up, so total lift has to grow until that vertical part still equals the weight. The multiplier is the load factor, 1 divided by the cosine of the bank angle.
Level turn · bank 45°
load factor 1.41 G · stall speed ×1.19
Rear view of an aircraft in a level, coordinated turn. Lift tilts with the wings, so it has to grow until its vertical part still holds up the weight. At 60° that takes 2 G, and stall speed rises by about 41 percent.
At 30 degrees of bank the load factor is only about 1.15. At 60 degrees it is exactly 2, and the curve steepens quickly after that. Stall speed rises with the square root of load factor, so the same aircraft stalls at a speed about 41 percent higher in a 60 degree turn than in level flight. That is why steep turns close to the ground are dangerous in any fixed-wing aircraft, and why the exam asks about it.
SkyReady 107 is not affiliated with or endorsed by the FAA.
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