RC Airplane Cowl | STL Files for 3D Printing There are 3 .STL files in total, compressed into a .zip file.
This is a full cowl and cowling flaps inspired by my work on a 1/12 scale A-20 Havoc light bomber from World War Two. My A-20 is electric powered and I wanted a cowl which I could remove without taking off the propeller. The best way to accomplish this was to split the cowl vertically and use neodymium magnets for attachment.
There are three STL files included. The left side of the cowl, the right side of the cowl, and the full ring of cowl flaps.
The cowl has a diameter of 5-1/4 inches at the trailing edge. The opening diameter at the leading edge is 3-1/2 inches. The cowl from leading edge to trailing edge is 3-1/2 inches deep. The cowl flaps are almost one inch long.
There are spaces for six 4mm x 2mm neodymium magnets on each half of the cowl, though I only used the forward four. There are spaces for three rear facing 6mm x 1.5mm neodymium magnets on each cowl half. Five minute epoxy is required to attach the magnets and wax paper is needed to separate the halves and magnets while doing epoxy work.
One of the pictures shows the wood framework of one nacelle on my model which the cowl will be attaching to. There are six 6mm x 1.5mm neodymium magnets total epoxied into this nacelle for the cowl to attach.
Use Bondo Glazing Putty to fill and smooth parts for finishing in preparation for painting. There are some good pictures of this process in the F6F Hellcat propeller ad.
Materials required to complete cowl: 3D printer with filament and a 7 x 7 inch print bed. (12) 4mm x 2mm neodymium magnets. (12) 6mm x 1.5mm neodymium magnets. Five Minute epoxy. Wax paper. Bondo Glazing Putty. 60 grit and 100 grit sandpaper or equivalent. Primer and paint of your choice.
This is an order for STL files to 3D print unlimited number of RC Airplane Cowls for your own personal use ONLY. Please don't give away or resell the files.