Examples
Examples
Try the starting example
- Stroke (mm)
- 86
- Engine speed (RPM)
- 6000
- Mean piston travel speed (m/s)
- 17.2
- Mean piston travel speed (feet/minute)
- 3,385.826772
- Total piston travel per crankshaft revolution (m)
- 0.172
Try another scenario
- Stroke (mm)
- 86
- Engine speed (RPM)
- 3000
- Mean piston travel speed (m/s)
- 8.6
- Mean piston travel speed (feet/minute)
- 1,692.913386
- Total piston travel per crankshaft revolution (m)
- 0.172
Calculation method
Calculation method
Mean piston travel speed (m/s)
Two strokes of travel per revolution: 2×stroke/1000×RPM/60.
Mean piston travel speed (feet/minute)
Mean m/s×60/0.3048, using exact foot conversion.
Total piston travel per crankshaft revolution (m)
2×stroke/1000; this is path travel, not net piston displacement after a revolution.
Symbols and units
- a
- Stroke (mm)
- b
- Engine speed (RPM)
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
- Mean geometric piston path speed, not peak speed, acceleration, connecting-rod geometry, an engine RPM limit or a component suitability judgment.
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.