Scope
Overview
This document will analyze the flight of Hermes 1 at Friends of Amateur Rocketry in July of 2018. The document will outline the flight performance of the vehicle, calling specific attention to any deviances. These flight events will be discussed in roughly chronological order, by subsystem. Under-characterized or poorly understood behaviors will be noted for future efforts. A section at the end of this document will discuss lessons learned.
Methodologies
Times are indicated as T+ or T- from the first vertical motion on the rail (liftoff). Times are indexed off of the Telemetrum data.
| Time [s] | Flight Event |
|---|---|
| T-3.83 | Ignition |
| T+0.00 | Liftoff |
| 0.27 | Tower Cleared |
| Pierced Cloud Ceiling | |
| 6.75 | Burnout |
| 43.79 | Apogee |
| 48.60 | Drogue Inflation |
| 298.20 | Main Release |
| 300.5 | Main Inflation |
| 363.00 | Touchdown |
...
Avionics
Payload
Propulsion
...
- Having a good checklist would have been beneficial, even though we likely wouldn't have been able to integrate the rocket in the amount of time that we were given before the end of the launch window if we had been following a strict checklist.
- Regular batteries are NOT enough to fire 2 e-matches in parallel. We ran into this problem during the ground test, as well as a previous static fire.
Times are indicated as T+ or T- from the first vertical motion on the rail (liftoff). Times are indexed off of the nadir (aft) facing Mobius camera. The zenith camera timestamps lag by 4.076s. Values are taken from either Pyxida or TeleMetrum data. Most StratoLogger data was unavailable to the author of this document.