Solenoid parameters at angular setting the length

Obvious presentation is considered in the form of diagrams of form factors, first odd members of magnetic field decomposition, optimum solenoids curves for cylindrical, trapeziform and conic coils using reduction to external radius and angle between radius and direction on a most remote from centre point of winding. One-type presentation, enveloping all typical dimensions of coils at constant density, simplifies the choice of the coil type or coils combinations