Development of a cone hood

Development-pattern of an exhaust hood in the shape of a truncated cone

A - Diameter of the upper base.
D - Bottom base diameter.
H - Height.

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The calculator allows you to calculate the parameters of a truncated cone. This is useful for calculating exhaust hoods for ventilation, or an umbrella for a chimney pipe.

How to use the calculation.

Indicate the known dimensions of the exhaust hood. Click the Calculate button. As a result of the calculation, drawings of the exhaust hood pattern are generated.
The drawings show the dimensions for cutting a truncated cone.
Side view drawings are also generated.

As a result of the calculation, you can find out:

The angle of inclination of the cone walls.
Cutting angles on the development.
Upper and lower cutting diameters.
Workpiece sheet dimensions.

Attention. Don't forget to add allowances for the folds to connect the parts of the hood.