Recent content by jrmichler

The extreme case of a clamp not conforming to the shaft would be two flat pieces clamped to the shaft as in the diagram below. Two bolts, each with clamp force F. The free body diagram (FBD) is on the right. The total normal force for each clamp piece is 2F. The maximum tangential force for...

Thermal mass flow sensors measure mass flow, normally of a gas such as air. The output has units of mass per time, such as kg/sec. Thermal flux sensors measure heat flow. The output has units of power per area, such as watts/cm##^2##. A good explanation is in the Thermogage User's Guide...

When I was a grad student teaching assistant in the early 1990's, I assigned a design problem for the gears and bearings class. The assignment: Design a brake disk for the Mini Baja Speed 45 MPH Gross weight 500 lbs It needs to make one stop from full speed Use materials from your textbook...

I walk slightly over 2000 steps per mile at 120 steps per minute. That's about 17 minutes per mile. Normal walking around is 1500 to 2000 steps per day, so a goal of 10,000 steps per day would require a walk of slightly over 4 miles, or slightly more than one hour. Only a few years ago, my...

The best vacuum pump depends on your needs. You need to specify two things - the amount of vacuum and the flow rate before we can give you useful advice. Amount of vacuum could be, for example: 1 inch of water, 20 inches of mercury, 10 torr, 1 torr, 1 millitorr, or other. You need to...

Hydraulic oil is compressible. The volume compressibility is about 0.5% per 1000 PSI, so the 2500 PSI mentioned would compress the oil by 1.25%. The volume of compressed oil is the total volume from the hydraulic cylinder piston back to the pump. The hydraulic hoses also stretch under...

A quote from the above quote: "Many of the mistakes Claudius made are very likely the result of the model needing additional scaffolding—that is, more careful prompts, ..." So Anthropic says that it's the user's fault for not getting the prompt exactly correct, but they don't know for sure...

The 7200 volt distribution line past my house has steel conductors without insulation. We had a big storm last year that closed the road in nine places around my house. I had a good look at the downed lines while helping the town road crew chainsaw trees. The wires did not break in one place...

Beginning mile 2 of my 4 mile morning run yesterday. Calm wind and comfortable at -7 deg F. The next 10 miles down this road are all public land.

My jobs have been mostly analyst, problem solver, mentoring young engineers, and project engineering. I have used MATLAB extensively. I have looked at other packages, but ended not using any of them. My actual calculations were mostly algebra and trigonometry, with some calculus. I have...

I used search terms 5052 aluminum annealing temperature, and got several good results. Some of the confusion might be due to the way that it starts to soften at 500 deg F, but needs 650 deg F to anneal. That's why some sites mention hot working at temperatures above 500 deg F, and annealing at...

Mine did it twice yesterday, but only twice. And not on this thread. Chrome, Windows 10.

I got the same, then cut and pasted just the https://www.pv-magazine-australia.com portion of the link. I clicked on the article, and cut and pasted the link of the article: https://www.pv-magazine-australia.com/2025/12/01/synchronous-condensers-to-play-key-role-in-system-security-says-aemo/...

The paper linked in Post #4 is a good discussion of bolted joints for a person with a background in the subject. It's not so good to learn about bolted joints. Search terms theory of bolted joints found this good hit: https://www.boltscience.com/pages/basics1.htm. The Wikipedia article at...

Windows 10 and Chrome.