The engine lifetime report
The full analysis, with plain-English introductions, graphs, methodology and priorities for Loren Ahrens.
Download the reports, the measurements behind the findings, or the original Garmin logs. Every route and trend on this site comes from these recordings.
The full analysis, with plain-English introductions, graphs, methodology and priorities for Loren Ahrens.
The October 11 lean test, the July comparison and concise findings prepared for Ahrens Aviation.
775 usable timed native Garmin logs, preserved byte-for-byte. Includes ground sessions and the 541 flight-bearing recordings used in the analysis.
All 24 usable timed files from February and March 2025: 17 flight-bearing logs and seven ground-only sessions.
Per-recording engine summaries, observed hours, region classifications and condition-matched comparisons.
The original main GAMI test-flight file, ready to upload to Savvy. Its native format and bytes are preserved.
| Dataset | What it contains | Size |
|---|---|---|
| Journey index ↓ | Dates, airport pairs, recorded duration, track distance and departure readings. | 6 KB |
| GPS routes · GeoJSON ↓ | Recorded route geometry for use in a GIS or another mapping tool. | 419 KB |
| Comparable high-field departures ↓ | All 47 departure windows: 20 earlier, 13 in the low-flow period and 14 later. | 45 KB |
| Departure measurements ↓ | Power, fuel, temperature and altitude summaries for selected departure windows. | 500 KB |
| Event evidence ↓ | Original filenames, times and measurements for events selected for review. | 12 KB |
| Comparisons with fixed 2024 references ↓ | Later-flight comparisons with a consistent historical reference pool. | 2 KB |
| Lean-test candidate review ↓ | Accepted and rejected mixture sweeps and review notes. | 6 KB |
| Source manifest & hashes ↓ | Original relative filenames, file fingerprints and ingestion audit information. | 437 KB |
The complete archive contains the 775 usable timed source files retained by the analysis; duplicate and empty files are excluded. Native CSVs retain their original Garmin formatting. Derived durations are based on recorded samples and are separate from tach or Hobbs time. All website dates are UTC.