Wave Drag Explained — What Happens to Your HPR Rocket at Mach 1
If you have ever looked at the Aerodynamics tab in Project APEX after simulating a fast flight, you have seen it: a sharp rise in the Cd curve somewhere between Mach 0.8 and Mach 1.2, then a gradual fall as speed climbs further. That spike is wave drag, and for any rocket fast enough to […]
OpenRocket vs Project APEX — Which HPR Flight Simulator Should You Use?
Most HPR flyers discover OpenRocket first. It has been the community standard since 2008 — free, desktop-based, rigorously validated against thousands of flights, and backed by a large active forum. If you’re reading this, you probably already have it installed. So where does Project APEX fit? The short answer is: alongside OpenRocket, not instead of […]