Building off of my earlier sliding valve air engine( https://www.thingiverse.com/thing:2492963), here is a 2 cylinder version. This design runs well, but it needs lots of air.
Included in the files is a list of parts and hardware - See BOM_list.pdf. There are also pictures to help set the eccentric orientation during assembly.
Also a .step file is included if you want to make changes.
Slider_3 was optimized for the single cylinder engine and may be a better option for this engine too. It works well with Slider_2
Here are a couple videos of the engine in action.
| air_box_cover.stl | 264.7KB | |
| air_dist_box.stl | 422.2KB | |
| base_new.stl | 341.7KB | |
| bearing_cover.stl | 881.4KB | |
| BOM_List.pdf | 232.3KB | |
| cylinder_center.stl | 2.3MB | |
| eccentric.stl | 651.8KB | |
| end_1.stl | 380.7KB | |
| end_2.stl | 524.3KB | |
| engine_asm_asm.stp | 5.8MB | |
| flange_bearing_tall.stl | 544.0KB | |
| fly_wheel_thin.stl | 844.6KB | |
| hose_barb.stl | 690.7KB | |
| piston_new.stl | 730.6KB | |
| piston_rod.stl | 958.1KB | |
| piston_rod_1.stl | 301.6KB | |
| shaft_main.stl | 46.6KB | |
| slider_2.stl | 76.3KB | |
| slider_3.stl | 76.3KB | |
| slider_rod.stl | 626.4KB | |
| spacer.stl | 384.7KB | |
| support_rear.stl | 697.1KB |
