Coilgun Propulsion Chamber (Bobbin Spool)

Create a 3D printable CAD model of a cylindrical propulsion chamber for an electromagnetic coilgun, shaped like a spool or bobbin. Specifications: - Total length: 90 mm (9 cm). - Rear end: Completely closed (flat solid wall at the back). - Inner diameter (bore): exactly 12 mm straight through, allowing a 10 mm diameter hex key (Allen wrench) to slide smoothly. - Wall thickness: Fixed at exactly 1 mm throughout the entire cylinder (resulting in a 14 mm outer diameter for the main body). - Spool design (Bobbin flanges): A 50 mm (5 cm) long section dedicated to the wire coil, flanked and delimited on both ends by two circular retaining flanges (disks/walls) like a thread spool. - Positioning of the coil section: The 50 mm spool section must be located specifically at the rear/end part of the 90 mm cylinder. - Front end connector: The front tip of the cylinder must feature an extra 5 mm of plain cylindrical extension (without flanges). - Internal features: Completely remove any internal mechanical stoppers or lips inside the bore; the inner diameter must be an unobstructed 12 mm straight through from end to end.

Parameters

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.