- Webster 4 Stroke EngineThis is a single cylinder 4-stroke engine based off of the design from Webster Engine Works. There is the main cylinder housing the piston, and cams that control the exhaust valves. All components are designed using either steel, aluminum, or bronze for manufacturing purposes.
- Aquino thermal chamberWorking on making a 3d-printable thermal chamber that uses forced air convection to distribute the heat. The idea to overcome the poor thermal conductivity of plastic by using complex geometry... Of course, we're limited by the max temp the plastic can manage, but with high-end FDM materials, that's over 200°C!
- Helicopter rotor head desk toyA handsome little desk toy demonstrating how cyclic and collective pitch control work on a helicopter rotor head. Probably both the prettiest CAD model I've ever made and the most severely overengineered casual design project I've ever done. Modeled 100% from scratch in Fusion 360, down to the last bearing ball. Demonstration only. Not for flight use. The three levers don't represent pilot controls; they're direct inputs to the swashplate. Together they control the pitch of the rotor blades in both "collective" (constant throughout the rotation of the head) and "cyclic" (going up and down as the head rotates) components. You get to do the control mixing in your head. Move the outer levers together and the middle lever in the opposite direction, and you get roll. Hold the middle lever still and move the outer levers in opposing directions, and you get pitch ("pitch" in this instance referring to a "pitching" motion of the vehicle, not to blade pitch). Move all three levers together to drive the collective pitch, which controls overall lift. While it would have been neat to model the sort of rotor head you might find on a full-size helicopter, those things just don't scale very well. Most of the neat dynamic features on a full-size rotor head wouldn't really work on a small static model. Blade pitch control (or "feathering") is arguably the most important part anyway -- the other degrees of freedom in a "real" rotor head (and their associated control and damping mechanisms) are mostly there to make the aircraft more stable and less likely to be destroyed immediately by unbalanced dynamic forces. Anyway, the short of it is that this is much closer to what you'd find on a modern RC helicopter than on a full-size one. In the model aircraft world, this would be called a "DFC" rotor head because the upper part of the swashplate is rotationally coupled to the shaft by the pitch links, rather than by a separate scissor mechanism. It would also be called a "flybarless" head because it lacks the mechanical stabilization system found on conventional heads, instead relying on electronics and software to do the job. It would probably also be called a "dangerous" head because the feathering shafts just thread directly into the hub without any damping. Did I mention this is not for flight use? Lend me a 5-axis machining center and I'll build you one.
- Thompson Coupling Desk ModelA demonstration model of the Thompson constant-velocity joint mechanism on a nice wooden base. Based on Patent # US7442126. I've never seen one of these in a real-world application, but it's a pretty clever mechanism. It's like a double Cardan joint folded inside itself and uses a weird spherical pantograph arrangement to maintain phase between the input and output shafts. Note: This is a "toy" implementation and the dimensions are all arbitrary and non-optimal.
- Folding 250 Class FPV Quad-CopterI designed this quadcopter as something that can be entirely 3D printed and laser cut. I needed an FPV (first person view) capable frame that had enough room to mount all the equipment, as well as some extra space for a nice camera. The frame layers can be machined from carbon fiber plate, laser cut, or printed in ABS plastic. The arms should be printed in ABS. It will accept up to 5" props, large 20A ESC, and a pretty large battery. Finally, the arms fold inwards for portability. Feel free to use this design for your next build.