NOVELTY - The kit of parts includes a set of support sections (6a-6d) joined end to end to form a support member (6), and lightweight rotor sections (3a-3d) of roto-molded plastics or lightweight metal e.g. aluminum, assembled together to form a rotor. The support supports the rotor so as to spin about an upright axis to produce drive force using Magnus effect. Each support section has support components including uprights (7), braces (8) and joining plates (9). An upper bearing (14) allows part of the rotor weight to be supported at lower and upper sections.    USE - Kit of parts for Magnus effect apparatus (claimed), particularly a Magnus effect rotor apparatus (claimed) or wind engine for driving a vessel, such as a ship, or vehicle, operable to generate drive force from wind.    ADVANTAGE - The kit of parts including the rotor and support sections allows the Magnus effect rotor apparatus to be shipped as a kit of disassembled parts. The support structure of the rotor apparatus can be assembled in-situ, since the lightweight framework structure can be assembled by adding parts individually or in small subassemblies. The assembling process can be performed by one or two operators who need only handle the individual parts or relatively small subassemblies and avoid need for liquid equipment or specialized heavy equipment. The parts can be connected together by e.g. bolting, welding, snap-fitting. The support is formed of support sections connected end to end, realizing a simple modular construction. The rotor formed from rotor sections is rigid lengthwise to allow the rotor weight to supported at two or more of the sections. The weight of the rotor can be distributed between upper and lower sections of the same rotor, allowing the rotor to be made from lightweight material as the compression of the lower sections is reduced, and reducing tendency of the sections to buckle under load. Both rotor and support are lightweight and inexpensive, facilitating shipping, handling, and assembly. The use of lightweight rotor allows use of light duty drive motors for the rotor apparatus. With one rotor section placed under tension, the same section can assist in resisting buckling forces produced by wind power.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a method of assembling a Magnus effect rotor apparatus;    (2) a method of manufacture of a deployable Magnus effect rotor apparatus operable to generate a drive force from wind; and    (3) a method of loading or unloading a vessel.    DESCRIPTION OF DRAWING(S) - The drawing shows the schematic view of the internal structure of a Magnus effect rotor apparatus.    Rotor sections (3a-3d)    Support member (6)    Support sections (6a-6d)    Uprights (7)    Braces (8)    Joining plates (9)    Upper bearing (14)