CHT/EGT Baseline Log
CHT/EGT Baseline Log with structured readings per session — build the longitudinal trend record that single measurements can't provide.
380°F can be normal for your #3 in climb and alarming for your #5 in cruise: only a recorded baseline tells you which.
No entries yet — add your first one above. Data stays in your browser.
⚠️ Not for operational decisions. This is a record-keeping and planning aid only — not certified avionics, not a source of regulatory truth. Always verify against official sources (FAA) and your operator's approved documents before flying.
Free cht/egt baseline log: structured per-session readings that build the trend record — because 380°f can be normal for your #3 in climb and alarming for your #5 in cruise.
About CHT/EGT Baseline Log
Every engine/airframe combination has a thermal personality — which cylinder runs hottest, normal spreads by phase, summer vs winter deltas — and deviations from that personal baseline are the earliest mechanical warnings. The corollary: 380°F can be normal for your #3 in climb and alarming for your #5 in cruise: only a recorded baseline tells you which. This log enforces the structure that makes trends readable — the same fields every session, dated, per aircraft — so the comparison that diagnosis depends on is a glance at the table instead of a dig through shop invoices and memory. Export the CSV before any maintenance conversation and your mechanic starts from data.
How to use CHT/EGT Baseline Log
- 1Log the structured readings after each flight, sample or service event.
- 2Scan the table for drift against your own baseline before reacting to single values.
- 3Export the trend record for your mechanic, engine shop or analysis lab.
Why use CHT/EGT Baseline Log?
- ✓Identical structured fields every session — trends stay comparable
- ✓Per-aircraft/engine separation for multi-aircraft owners
- ✓12-month activity tile shows whether the record is staying alive
- ✓Captures the signal that matters: 380°f can be normal for your #3 in climb and alarming for your #5 in cruise
- ✓CSV export turns maintenance conversations into data reviews
Frequently asked questions
What baseline should I record for CHT/EGT monitoring?+
Per phase of flight (climb, LOP cruise, ROP cruise) record: the hottest cylinder's identity and value, the spread across cylinders, and the OAT context. Do that across a dozen flights spanning seasons and you own the reference that turns engine-monitor data diagnostic: when #3 — historically your coolest — becomes the hottest at unchanged settings, you've caught a baffle, probe or induction issue while it's still a ground item.
How often should these readings be logged to be useful?+
Often enough that the series outweighs the noise: every oil change for analysis-type records, every flight or weekly for monitor-derived numbers, every annual for inspection-type checks. The honest rule is consistency over frequency — six identical-format entries a year beat sporadic bursts, because trend reading depends on comparable conditions and unbroken sequence more than on raw volume.
Why doesn't this tool sync to the cloud?+
By design: operational records are sensitive, and the simplest privacy guarantee is never transmitting them. Local-only storage means zero servers, zero breach surface and zero subscription. If you work from several devices, keep one as the master record and move snapshots with the CSV export.
How do I back up or print these records?+
Use the Export CSV button below the table: it downloads your full engine condition record as a spreadsheet-ready file. From there you can print a clean copy, archive it with your records folder, or import it into any other system. Exporting monthly is a good habit since the working data lives only in your browser.
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