Having never encountered this (but with my mechanical-design autocad work pre-dating publication of this standard), I took a look at the Wikipedia page for ISO 13857, and it seems that this is oriented very strongly towards building-construction applications as opposed to mechanical design.
We haven't a legal requirement for winter tires, but past experience has been that so-called all-season tires are hopeless in snow. For the last several cars, I've put snow tires on the stock rims for use in winter, and bought a nice set of summer rims and tires.
Some tire manufacturers are now...
Did you account for the quality (mass fraction of vapour in the vapour-liquid mixture) through to the end of the expansion phase?
(If your expansion starts with saturated steam, a portion of it is going to condense to water, in the form of mist dispersed in the remaining vapour, during the...
Re-read posts 55 and 59, and explain with sound thermodynamic reasoning and P-V diagrams why this should be the case. I maintain that it will not. The combustion chamber doesn't care about the design of the mechanism that turns up-and-down into round-and-round aside from its mechanical...
Having just done the winter-tire swap on my car (GM), it has M14 studs also, and I just ran downstairs to check. The aftermarket wheels and matched wheel nuts (not OEM) have a conical interface and the holes in the wheels are 14.8mm diameter, which is what one would expect for M14 fasteners to...
It would sure help us in the rest of the world if we knew what sort of trailer this is, where the wheels came from, where the axle came from, where the nuts came from, whether the wheels are the correct ones to be used on that axle, whether the nuts are the correct ones to use with those wheels...
By gut feel this sounds about right.
Just out of curiosity ... Steel disk 400mm diameter and 20mm thick has a volume of 2513 cm3 and at 7.8 g/cm3 density of steel, that's about 19 kg, and considering that those dimensions are ruff approximations and I know the centre of the disk isn't full...
When doing calculations in proper SI units, "g" has no business anywhere unless the force of gravity is actually involved in whatever you are interested in, which is not the case here.
Engaging what is effectively a dog clutch when there is a large difference in rotational speed between them, breaks stuff.
You're doing your calculations in imperial units, which are gibberish to me. I have no feel for whether that old-English imperial number is rational.
The inertia of the brake rotor is small compared to the inertia of the wheel and tire assembly. Reason: the tread of the tire has the full radius of the assembly contributing to the moment of inertia, and the sidewalls of the tire have most of it contributing. And at least on any of my vehicles...
Fiat 500e is roughly the same size as a BYD Seagull, and does decently in Euro NCAP. https://cdn.euroncap.com/media/66921/euroncap-2021-fiat-500e-datasheet.pdf
Obviously it is not the same car, but it's about the same size and weight (the Fiat is a little smaller), and the Fiat 500e is sold in...
The BYD Seagull is not (yet) sold in Australia and hasn't been tested (or perhaps it has, but results are not yet published), but all of its companion models including the marginally-bigger Dolphin have been tested, and have good NCAP ratings (5 stars).
Testing within China to their own...
"EVs have fewer parts so less to integrate and test."
Well, I wouldn't say "fewer", just "different". The motor is simpler than an engine, the gear-reducer is simpler than a transmission, there's no exhaust system or fuel system, but the battery and electronic controls and thermal management...
We have a students forum section, and this really belongs there!
Things you're going to need to know.
What's the instantaneous and longer-term-average charge and discharge rates. How much (a) peak, and (b) longer-term-average are you going to have to deal with?
What's the efficiency of...
My crystal ball is cloudy, but I see layoffs ahead in almost anything that involves manufacturing and retailing, and unskilled jobs in USA going unfilled in most any outdoor work ... and gruntguru has a fair point about hospitality, as well.
I'm happy to be retired, but it doesn't mean I don't...
It WILL have all sorts of problems during operation, too. I just chose not to get into that discussion, aside from (as per previous post) mentioning that you've got an indeterminate structural situation that it will pass through twice on each and every crankshaft revolution, which will manifest...
There is no such thing as a frictionless mechanism. If this mechanism comes to a stop within a few degrees of the piston-halfway point, it WILL bind, and you will NOT get out of this bind by "turning the shaft manually" (or via starting motor).
A properly assembled conventional-layout...
