Pusher prop forward spinner flow guide for 8-inch extension

thingiverse

NOTE: updated because the basis of my prop extension is now accurately defined as 5 and 15/16 inches, not six inches. This revised mold requires one-eighth inch thick material instead of three thirty-seconds inch thick. This is just one half of a mold for a spinner flow guide specifically designed for use with pusher prop airplanes that employ Lightspeed Engineering's spinner. The flow guide itself is engineered to accommodate multiple layers of carbon fiber or fiberglass, each measuring 0.3 millimeters in thickness per layer. Where the guide extends beyond the spinner at its bulkhead, it consists of three distinct layers, whereas at its base, it requires only two layers, necessitating the addition of a single strip of fabric between these layers at the larger end. The base of the guide slip is crafted to fit snugly around an eight-inch Saber prop extension, with a layer of three thirty-seconds inch silicone baffle material serving as the interface, carefully bonded to the guide using RTV. Consequently, the internal diameter of the mold's base is determined by adding six inches (the extension base), four times 0.3 millimeters, two times one-eighth inch, and an additional 0.1 millimeter for clearance and bond line purposes. Please refer to additional models available here for a balancing rig and gluing form tailored for the base. The connector pins are precisely modeled at three sixteenths of an inch in diameter, making eight half-inch long wood dowel pins an ideal choice. To ensure smooth mold release, apply several rounds of this substance.