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It's not a very good design. Hard to assemble, and will almost certainly leak.

Assuming that the original alternator and the turbine were well matched....... Then you'll need to look at the turbine performance charts and the controls to see how happy it will be running at about 75% of its "design" rating. The turbine efficiency will likely drop a few percentage points...

And here you are asking strangers on the internet what to do. It's your life. You need to take control of it. Stop waiting for others to do it for you.

The assessment for IP ratings is "protected against the harmful effects of....". So if the valve "Worked perfectly before and after the test" then it passed, didn't it.

It might be really helpful for you to have a set of well defined design requirements and constraints.

zirconium nitride can be sputtered. zirconium oxide and zirconium carbide can be applied by CVD. Do you need the thickness implied by weld overlay? Do you need the ERZr-2 composition?

It's a fine mess. I doubt that the applying new galvanized sheet over the existing rust would have worked. As 3DDave noted, it just becomes a place for mold to grow and other crap to accumulate. Did whoever actually did the spraying wear any sort of respirator? Toxic nasty stuff in an...

In my many years of experience I've never heard the term "barycentric". I had to look it up. The geometry leads to self-energization, which contributes to both the "crushing load", and if we guess that T0 is tension somewhere, that as well. I guess that "construction drawing" is somewhere...

If we believe your earlier link, then I don't see any hydraulic backup for TE flaps. I guess the mitigation is "you'll be landing fast, deal with it." From the excellent b737 site http://www.b737.org.uk/hydraulics.htm

An interesting read. https://arstechnica.com/space/2025/04/the-harrowing-story-of-what-flying-starliner-was-like-when-its-thrusters-failed/

I don't follow. Up is off, down is on for both sets of switches. I'd guess that convention is applied for all switches. If so, I'd expect that to be ingrained. How do you mistakenly turn a system off when you're intending to turn something on.

Something derived from barnacles couldn't be used on Muslims or devote Jews.

You're not giving us much to go on. How much design freedom do you have? What speed? What forces? Are you just moving the thing, or do you need to accurately position it? If so, to what precision? Does it ***absolutely have to be*** a rack and pinion? Does the motor ***absolutely have to...

Are the rollers rubber? The problem you're trying to solve isn't clear. Set the engagement once, how does it change?

That's a constant acceleration. It results in a linear speed v. time profile.

I hope you mean "linear speed profile", not linearly increasing acceleration. But that requires constant acceleration, which you probably don't want to do. Basically, you want the left half of this (from: https://www.digikey.jp/en/blog/motion-control-profiles-good-better-and-best)

Everything you need is here: https://phys.libretexts.org/Bookshelves/University_Physics/University_Physics_(OpenStax)/Book%3A_University_Physics_I_-_Mechanics_Sound_Oscillations_and_Waves_(OpenStax)/10%3A_Fixed-Axis_Rotation__Introduction/10.09%3A_Work_and_Power_for_Rotational_Motion

Huh? That's not relevant. Anyways, how much clamping force do you need? How to select fasteners: Define the clamping force. Decide the number of fasteners. Decide material. Decide diameter. Decide if torque control is good enough. If yes, calculate torque.