Examples
Examples
Try the starting example
- Pressure records: ID, reference pressure, cylinder pressure on same gauge basis
- A,90,81 B,100,80
- Displayed nominal convention: loss or retained
- loss
- Nominal reported pressure ratio by record (%)
- A: 10; B: 20
- Reference-minus-cylinder pressure by record
- A: 9; B: 20
- Complement ratio by record (%)
- A: 90; B: 80
Try another scenario
- Pressure records: ID, reference pressure, cylinder pressure on same gauge basis
- A,90,81 B,100,80
- Displayed nominal convention: loss or retained
- retained
- Nominal reported pressure ratio by record (%)
- A: 90; B: 80
- Reference-minus-cylinder pressure by record
- A: 9; B: 20
- Complement ratio by record (%)
- A: 10; B: 20
Calculation method
Calculation method
Nominal reported pressure ratio by record (%)
Loss=100×(reference−cylinder)/reference; retained=100×cylinder/reference. Preserve signed values outside usual range.
Reference-minus-cylinder pressure by record
Subtract readings in the same supplied pressure unit.
Complement ratio by record (%)
100−displayed nominal percentage; it is a pressure relation, not a calibrated leakage flow.
Symbols and units
- a
- Pressure records: ID, reference pressure, cylinder pressure on same gauge basis
- b
- Displayed nominal convention: loss or retained
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Supplied nominal pressure-ratio arithmetic only. A leak-down tester’s actual flow/orifice calibration and manufacturer convention are external; this does not measure leakage flow or diagnose an engine.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
OpenStax: ratios, unit rates and supplied measurement arithmetic ↗
Background reading; this does not imply endorsement or independent review of SumFizz.