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For you that have a 3D printer and think it is accurate. Mount a brush toy motor with a small drill of center point and mark up the Dividing plate. https://www.thingiverse.com/thing:4858421 That is the hardware. To get the printer to move correctly is what I have been looking for...

A way to get accurate holes to make your own plate is to realize that the error is the same when for a hole that are on a 6 inch disk or A 3 yard disk. Drill a hole through the three tightly aligned. Need to match a dowel center punch and dowels for alignment. Now with a dowel in a plug...

May not find this metal strip, however; printers that use punch holes to drive the paper would work also. Not very strong but accurate. Make your own strip with this as the template. Get a punch that matches the diameter of the hole lift it off the metal and punch on a bar of metal a group of...

Sand dunes work on the principle that as air rises the entrain heavy sand drops out. So the cyclone isn't needed for removing the sand. Much of the sand will settle out where the nozzle isn't pointing. Just putting a tee with a drop out closed leg out of the box. You see the same trap used...

Calculate the units for flow for this equation problem: Q <m^2*s>= (π * D^2 <m^2> * n<s^-1> * H<m>) / (4 * g)<s^2*m^-1> This isn't the unit for flow.

Another direct candidate is ASTRON'S OMEGA 1 ENGINE. https://www.slashgear.com/1576972/omega-1-engine-astron-real-everything-need-know/ Still has the three sides to seal and has the same rotors expansion problems The advantage of this engines is the length of the leak paths are very long...

The Wankel problem is sealing on the side faces and the walls of the chamber that creates the volume change. Thermal expansion of the hot rotor that can not be cooled to the housing temperatures and the vanes will always run hotter still. The "Liquid Piston" (flip of the Wankel) is even worse...

I have used used 3D cad when first moved from the mainframe running work stations to PCs. Have built model for employers as an engineer in ProE, Unigraphics, solid works. And at home free versions including Granite, Creteo (before in became paid), etc. Every single one does something poorly...

I was using 21.0. Updated to 21.2 just now. Read the text for A3 "attempt" stood out to me, and you still have to choose it from the tools menu for additional work benches, Only explode assembly is built in. The assemblies never were comparable. A3 if I remember was only in existence for a...

Have you looked in Mango Jelly you tube web site just search the workbench? I am still using 21. you can go back to 19 with the models. Assembly 4 has animation not assembly 3 example:

I help packaged a piece of equipment that measured corrosion in pipe for oil refineries. the problem mentioned here also occurs there. What was done was to attach in this case titanium wires in an array and measure the resistance between them and compare to the original. Very hot pipes...

Clearly a hobbyist will not consider anything above unless your casting huge things. Most home circuit breakers will be in the range of 220 VAC single phase and a 30 or 50 Amp breaker with the smaller one the most common. Assume 75% efficiency: power ~ 5 Kw and 8.25 Kw. Drop this down...

For the operation of a machine tool such as a lathe or milling machine. Induction motors have been the choice for a century. The reason is simple. They are robust and cheap compared to at the time brush DC motors. The machines use belts or gears to chance speed while maintaining all the power...

I have looked at the "liquid" piston engine. It is never going to reach the market in my opinion because it seems to ignored the reason why the Wankel engine never made it. Side leakage due to the gap needed to deal with the hotter rotor expansion. I could make a ceramic Wankel rotor or a...

The first internal combustion engines used "liquid" piston, water with a person operating the valve. These were used to pump water out of mines and later pumping water for irrigation. The largest that is still operational is in Australia that is a diesel water piston pump for irrigation out...

Have used hard coat aluminum for aerospace where steel is too heavy. Hard coat surface will not be as flat as the machined aluminum and gets worse with thickness. Rule of thumb is the aluminum is changed by a chemical reaction to make the ceramic, hard coat. and it goes about as deep into the...

One thing I know is that Aluminum oxidizes almost instantly. Oxidized aluminum is gray. So what your seeing is Aluminum oxide. You can not solder aluminum without either a flux that removes the oxide chemically and places a shield, liquid to prevent oxidation or melting a metal alloy and...

Dave, the model I posted for a bush DC motor which applies to all DC motors shows the relationship between speed and current. And the highest current occurs at zero rpm. So a fuse designed for motors will disconnect the motor when locked. Consumer product such as a garbage disposal that...

All windings are insulated from the laminations by the wire insulation, the insulation liner of the slot and the fact that the hottest wire are in the middle of the bundle in a slot. The only placement of the probe that will get even close to a good temperature is potted in the end turn...

This is the curves for the operation of a DC motor. It is for a PM stator and wounds rotor with brushes to control current flow. The curve for a brushless DC motor and a Universal brush motors will be similar unless the electronic limits current. A Brush motor is extremely robust. Do not...