The Netflix documentary was interesting but I believe distorted by former employees blaming the dead boss to CYA. Ultimately yes, SR was responsible for the culture and safety but the employees turned a blind eye, enabling it as long as possible. The original engineering team was largely...
1. Trailer chassis and suspension are both cost-driven commodities. Hopefully you have a good purchasing manager bc your business case is likely either a purchase or purchase&modify, not a custom design.
2. If you're designing/modifying, none of the ignorant assumptions or analysis above are...
The decision wasn't NASA's, McDonald claimed that he refused to signoff on the launch and that Thiokol execs overruled him.
His claim doesnt pass the sniff test tho, nor do others he's made. He was the Chief Engineer for a mega-corp, a 27-year employee, physically at Cape Canaveral for the...
Something worth remembering about the space program is that historically it hasnt viewed risk the same as other industries. During the Apollo program it was simply accepted that hundreds of critical components would fail during each mission, and redundancy wasnt built-in for safety but rather...
Warranty data proves their reliability, hence the reason they've been one of the top-selling engines for 15 years.
As mentioned previously, most of the top "influencers" on YouTube famously fake their videos for views and either mislead or blatantly lie about having professional experience...
Why reduce it?
With BJA you're primarily juggling the 1. number of fasteners, 2. diameter of fasteners, and 3. diameter of washers to ensure you're A. stretching fasteners to 75-90% for durability, B. without yielding material underneath your bolt head, and C. providing the necessary clamp...
Those are tough questions.
I took the PMP after a decade designing vehicles and industrial equipment with multiple PM certs in both Lean-Six and Agile Scrum.
Rather than simply taking the test, I signed up for what PMI billed as a 40-hour "refresher" bc the course+test was only slightly more...
Yup, its used on infrastructure projects the same as others. Some dont use it, some use it purely as a database for CAD & prints, and others also use it for process control and other purposes. Infrastructure development is the same as manufactured products in most ways. Large, complex, and/or...
You wont find many fuel systems without hoses, nor many made in recent decades without redundant safety shutoffs. Tugs are also predominantly large diesels, so there's little risk of fire.
A minor issue on a few years of one variant, of one engine, in one of the most-produced engine families...
IME most companies use a PDM/PLM app to automate engineering QC via standardized workflows and approvals. For example, the app typically doesnt allow engineers to roll their parts' CAD/print status to "released" until analysis/test/other reports have been uploaded and approved. Likewise, until...
Keyways are great for quick, cheap, but not particularly precise alignment and are downright lousy for transmitting torque. If you need to transmit any significant amount of torque you're usually better with a spline, taper, or bolted/clamped faces.
Potentially ignorant question from a non-mariner, but if a decent sized boat like this is motoring right along and the anchor suddenly drops&snags, is the line likely to survive? I'd assume there's an awful lot more energy in an emergency stop/snag than simply preventing movement when parked...
Yes, that's true of every bolted joint regardless of thread type. Your highest load, highest stress, and therefore largest thread concern is always in that first thread.
The difference between straight and tapered threads of identical major diameters in that circumstances isnt the loading, its...
Containing combustion is the easy part. The reason 90%+ of aftermarket liners are bought from a few specialty manufacturers is bc the rest of the aftermarket is famous for durability issues. When you change liner or block geometry, fit/press, or coolant passages you run a real risk of cracking...
Here in the rust belt, 20+ years ago the death of vehicles was split pretty evenly between blown head gaskets, automatic transmissions, clutches, or rust. Today, unless the vehicle's been severely abused its overwhelmingly rust.
Quality and design failures happen no doubt, but I would be careful to research and understand them before making decisions. Misinformation is getting more common and realistic between AI, staged YouTube "repair" videos, and other nonsense. I've honestly started to wonder if some arent...
The important variable is valve to seat contact area. To check it, apply a bit of dykem to the seats and rotate a valve 10* back&forth is both direction 2-3x. You want a consistent, wide contact area all the way around.
Recalls arent a meaningful quality metric. Most are to check for issues causing minor annoyances, not critical failures, and no repair is needed. The large volumes are likewise deceiving, often driven by the fact that the OE or supplier cant identify whether one individual skipped an assembly...
