NavySync vs Rocket Calculator

NavySync is an agenda/planner app designed to streamline an NJROTC unit and its activities. NavySync connects NSIs, cadets, and parents in one place. Firstly, NavySync contains a calendar which can be updated with unit activities, team events, and volunteer opportunities, for the entire unit, and specific to individual cadets. Within the “teams” tab, cadets can view announcements and upcoming events, with all details. This allows parents to view what their students are doing within NJROTC as well. Cadets can use this app to keep track of their future events, keeping them organized and punctual. NavySync contains study material and information for advancements, general NJROTC information, AMI preparation, and more. Additional features such as a ribbon rack builder and videos to learn how to shine shoes or perform drill movements make the complexities of NJROTC more manageable for cadets. In conclusion, with the implementation of this app, the many questions about “what’s going on” or “how should I” will have one answer. Check NavySync.”

ApogeeField is an offline flight calculator for low and mid-power model rocketry. Enter your rocket (dry mass, body diameter, drag coefficient, launch-guide length) and pick a motor, and it predicts your apogee, the best ejection delay, max velocity, and rail-exit velocity right at the pad — with no signal, no account, and no tracking. WHAT IT DOES - Apogee, max velocity and full altitude / velocity / acceleration flight curves — free. - Recommended ejection delay: ideal coast time mapped to the nearest delay you can actually buy, with the offset in seconds. - Rail-exit velocity with a configurable safety threshold, so you can judge whether the rocket will leave the rail under control. - Compare motors side by side and export your flight card and saved rockets. - Built-in motor database (thrust curves and certified statistics) plus import of your own .eng / .rse files. - Switch freely between metric and imperial units. HOW THE MODEL WORKS (and its limits) ApogeeField runs a deterministic 1-DOF (vertical, point-mass, with launch-angle cosine) flight integration: thrust-curve integration, variable-mass burn (propellant mass is subtracted as impulse is consumed), quadratic drag, and an ISA standard-atmosphere density model, coasting to apogee at the velocity zero-crossing. Every assumption is shown on the results screen so you can line your inputs up against OpenRocket or your own altimeter data. It is an engineering estimate for hobby use — a starting point, not a guarantee. The model does not account for wind, airframe stability, roll, or weathercocking, so real flights will differ. Always verify with an altimeter. This is not a safety, airworthiness, or legal document, and it does not replace the NAR / Tripoli safety code or local airspace rules — follow them. PRIVACY & PRICING 100% offline. No account, no network requests, no analytics, no ads. Your rockets and imported motor files stay on your device. One-time unlock — no subscription. Motor data are numerical facts drawn from publicly submitted thrust-curve files and NAR / Tripoli / CAR certification statistics, stored in our own format with the source and database version shown in the app.