https://emberfieldrockets.com/Flight cards, build notes and launch-day logs from a small model rocketry club in Pirkanmaa: fin alignment, recovery wadding, wind limits, altimeter readings and the range rules we fly under.enhttps://emberfieldrockets.com/journal/altimeter-readings-and-one-lost-airframe/https://emberfieldrockets.com/journal/altimeter-readings-and-one-lost-airframe/What two seasons of barometric altimeter data told us about our own estimates, and the flight in May 2026 that ended eighteen metres up a pine tree.Sun, 24 May 2026 12:00:00 GMThttps://emberfieldrockets.com/journal/wind-limits-and-how-the-range-runs/https://emberfieldrockets.com/journal/wind-limits-and-how-the-range-runs/The written procedure we use for a club launch day near Tampere: measured pad and spectator distances, a wind limit we do not argue with, and the log that comes off it.Sun, 17 Nov 2024 12:00:00 GMThttps://emberfieldrockets.com/journal/wadding-streamers-and-late-deployment/https://emberfieldrockets.com/journal/wadding-streamers-and-late-deployment/Scorched parachutes, a nose cone that never came off, and the recovery checks we added to the flight card after a poor season in 2023.Sun, 21 Apr 2024 12:00:00 GMThttps://emberfieldrockets.com/journal/fin-alignment-on-a-kitchen-table/https://emberfieldrockets.com/journal/fin-alignment-on-a-kitchen-table/Four seasons of rockets that flew crooked, the measurements we started taking, and the cardboard jig that made our launch angles repeatable.Sun, 24 Sep 2023 12:00:00 GMT