Viton/FKM chemistry is...weird. The base polymer for FKM is not well controlled, and the chemistry for Viton A is a vinyl backbone which can be problematic with oxygen rich environments and high temperatures. People specify Viton or FKM for high temperature water and steam, when both...
It's more of a time at temperature thing - polyester in cold or lukewarm water will hold up for a long time and is used as a wet filter fabric in those conditions, but as the temperature climbs it can suffer hydrolysis more and more rapidly. 180F is the general long-term use limit in submerged...
Yes, a higher tensile strength will mean more spring back. Fully annealed wire will spring back less than 1/2 hard or full hard or spring temper wire. As Ed said, stainless wire also springs back more than carbon steel wire due to differences in work hardening between the two materials.
"Are tax dollars being used to supplment Katy Perry and other celebrities who are paying to ride into 'space'?"
I don't know, are they?
Virgin Space has been doing tourism launches as well. I doubt much in the way of tax dollars, other than FAA, and local and state taxes to maintain airspace...
Taicho, it's possible if only using the HART or similar digital communication over the loop, rather than the analog value of the current (standard 4-20ma output)
Sounded to me like the OP wants to measure a flowing pressure drop (total pressure loss) across an open or partially open valve, i.e. a Cv curve. But, as Wil said, you need to be more specific about what testing you are contemplating.
It is still tricky to measure with nitrogen and then...
"I have my doubts as well, which is why I will continue to QUIETLY sit back, watch, and wait."
Except for the QUIETLY part?
Nothing Musk and his team have done is innovative, it is derivative, at least in the rocket biz. Tesla has done some cool stuff, but they were doing that before Musk...
"How many of these projects were funded by the US government? Here is another collapsing. It seems that there has been a massive collapse of the global green energy initiatives once DOGE started looking under the covers."
The one you posted is in Wales, which despite what our president might...
You didn't read the article, his numbers are inflation adjusted. Your quoted numbers are for manned lunar missions (including ground support), not payload delivery to LEO. He's using the cost of just the first and second Apollo stages (boosters), not the much more complex and costly Command...
Not sure why the cylinder needs to be stainless steel, but if it's for corrosion resistance more than strength, there are alternatives. An alternative corrosion resistant material would be glass tubing. It's formed to very tight (.001 mm) axial i.d. tolerances (shrink fit from the melt over...
A sketch of the seal geometry might help.
That said, the seal (presumably made from an elastomer?) will likely deform from the applied hydro test pressure and the internal air will equalize to be substantially the same as the hydro pressure.
"Well that is a really terribly written article. It consists only of assumptions."
No, there are some quoted facts - like Starship being more expensive per ton to orbit vs. Apollo. Refute the facts? No, a Tubgoat engineer can only make troll comments.
Um, I'm behind the times I guess. I have never heard of EPDM used as a thermoplastic elastomer (TPE), usually these are styrenic block or urethane based copolymers.
But I can't find mention of an EPDM-block TPE in a casual search. For instance...
