- vCalc Catalog Home
- rotary engine equivalent displacement

# rotary engine equivalent displacement

vCalc Reviewed

Equation / Last modified by Administrator on 2018/11/29 07:06
`D = `

Tags:

Rating

ID

vCalc.rotary engine equivalent displacement

UUID

32708ad6-18b3-11e4-b7aa-bc764e2038f2

The **Rotary Engine Equivalent Displacement** calculator computes an approximate equivalent engine displacement value (volume) for non-reciprocating engines based on the swept volume of a rotary engine (e.g. Maza rotary, Wankel) .

**INSTRUCTIONS:** Choose your units (default is cubic inches) and enter the following:

- (
**SV**) Swept Volume - (
**n**) Number of pistons

**Engine Displacement** The calculator returns the engine volume in cubic inches. However, the volume can be automatically converted to other volume units (e.g. cubic centimeters) via the pull-down menu. For the Total Displacement (volume) of Piston Engine, CLICK HERE.

#### The Math / Science

The formula for the Rotary Equivalent Displacement is:

D = (SV/3) • n

where:

- D is the Rotary Equivalent Displacement
- SV is the swept volume
- n is the number of pistons.

#### Related Combustion Engine Calculators:

**RATIOS AND LENGTHS:**- Bore Diameter based on the engine displacement, number of cylinders and the stroke length.
- Bore Stroke Ratio based on the diameter of the bore and the length of the stroke.
- Combustion Ratio base on the minimum and maximum displacements of the cylinder at the beginning (1-Induction) and compressed (3-Power) portions of the combustion cycle (see animation)
- Displacement Ratio based on the volumes at the beginning and end of the stroke.
- Rod and Stroke Length Ratio base on the two lengths.
- Stroke Length based on the total engine displacement, number of cylinders and the bore.

**VOLUMES:**- Total Volume (displacement) of a Combustion Engine based on the bore, stroke and number of cylinders.
- Volume (displacement) of a Engine Cylinder based on the bore and stroke.
- Volume (displacement) of an Engine with an Overbore based on the stroke, bore, overbore and number of cylinders.
- Compressed Volume of a Cylinder when the piston is at the end of the stroke and the chamber is at its smallest (and most compressed) volume, based on the chamber, deck, crevice, chamfer, gasket, valve relief and dome/dish volumes. This is the second volume (V2) in the Compression Ratio calculation.
- Volume of a Gasket based on the inner and outer diameters and the gasket's thickness.
- Volume of a Cylinder Deck based on the deck height and the bore.
- Volume of a Cylinder Crevice based on the piston diameter, cylinder bore and the crevice height.
- Volume of a Cylinder Chamfer based on the cylinder diameter and the chamfer height and width.

**SPEEDS AND RPMS:**

This equation,

**rotary engine equivalent displacement**, is used in 1 calculator.**Calculators**