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NACE Corrosion Engineer’s Reference Book, 4th Edition https://www.amazon.com/NACE-Corrosion-Engineers-Reference-Book/dp/1575903210 Books like this may be available for reference thru local libraries or corporate libraries... but 'free downloads' probably NOT.

TUG... Musk wants to de-orbit the ISS... to get it out of the way... and place his station in-orbit, instead. AND then simply by-pass the return-to-the-moon to focus on man-to-Mars.. his objective. To do all this NASA simply has to be taken apart and placed in the trash-can of history NOTE that...

Perhaps use a hydrogen-helium mix to conserve helium... without blowing-stuff-up? Sorry... I'm over-thinking this...

Tug, IR... You have hit the nail, squarely on the head! ozanooz's question lacks enough facts and candor for us to address.

We stand-on... and all progress of our world builds-on... the shoulders and 'workings of... the giants who came before us... and most of us are willing/humble enough to admit it.

AIAA has many related/technical articles/documents on most elements of 'wind turbine design'. Seriously. OH... and there are many tech books on wind turbine design... Related... NASA-STD-8719.28 WIND TUNNEL MODEL SYSTEMS CRITERIA

This is a 'complex' question wrapped-up in a KIS presentation. 'Lots to know... before You go.' Making aerospace grade fasteners is a commitment. Exactly what 'high quality' grade fasteners are you currently making... dimensional controls, alloys, metallurgy, finishes, testing, fab methods...

Explain to us WHAT you are proof-pressure testing with Helium... and what kind of pressure-loss sensor you are using... Your question is a bit 'off'... perhaps You mean: "if you are supposed to pressure test with helium... and all of the pressure test 'plumbing/valves' are designed for...

What is the min/max operating temperatures at the dissimilar metals contact points. Inconel and aluminums have grossly different expansion/contractions coefficients... and service temperatures RE: SAE AIR809 Metal Dimensional Change with Temperature Run some calculations and see how closely...

Trump announces Boeing wins contract for next-generation fighter jet... F-47??? Say-What???? This is likely unmanned...

Perhaps... this is a bit more realistic... for high speed/interstellar flight... The 100 Year Journey to Proxima Centauri B (Sci-Fi Documentary)... The First 10,000 Days on Proxima Centauri B (Sci-Fi Documentary)

Unmanned [optionally manned?] Fighter drones are coming. Current planning would place a manned fighter at the core of a 'team' of IA driven unmanned air-to-air, ground attack, SAM suppression, deep interdiction, etc drones. The majority would be considered force-multipliers for continuous high...

o_O

rb... You did it again! :p I will add this one to my list of Latin sayings... 'Caveat Erector!'

FYI ONLY... Composite tubes professionally manufactured... https://exelcomposites.com/composite-solutions/composite-tubes/ https://www.rockwestcomposites.com/tubes https://acpcomposites.com/category/tubes-rods https://dragonplate.com/carbon-fiber-tubes and so-on ...

In the fuel crisis of the mid 1970s airlines were scrambling for max fuel efficiency from the old legacy jets... such as 707s, 727s, 737-200s, etc... so the call went out.. find ways to conserve fuel! Example: Taxi with [1, twin] or [2 of four] engine where possible. Spool-up/check/rev-up the...

MAYBE MIL-STD-1 [and thru MIL-STD-24] might help interpretation... The MIL and the drawing are about the same era. also NAS30 and NAS31 [surface roughness C/Os might help. What company's name is on the drawing?

The UK has a few alloy s in common usage that are virtually unknown in the USA... and might have to be specially imported, such as Alloys 6063 [and now] 6082...

Hope this make sense... I am not 'dialed into all the analysis/testing', etc for eVTOL.. but here are a few thots to chew over... especially for human flight... and e-power-train issues... that don't seemed to have any 'honorable mention'... Every prop, gear box and motor and their use in...