 Did altitude just blow out 2 MPS's?, Put the in my checked baggage...now won't hold vac. |
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| ChrisFoley |
 Aug 29 2025, 08:00 AM
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#101
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I am Tangerine Racing  Group: Members Posts: 8,004 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None 
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QUOTE(Superhawk996 @ Aug 28 2025, 06:59 PM)  QUOTE(wonkipop @ Aug 28 2025, 07:39 PM) Whew!! I was getting worried about where to find mechanical properties of copper berrylium and having to measure the thickness. (IMG:style_emoticons/default/lol-2.gif) .0029" is close enough. Fully hardened. (IMG:style_emoticons/default/biggrin.gif) |
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| Superhawk996 |
Aug 29 2025, 08:30 AM
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#102
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914 Guru Group: Members Posts: 7,329 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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QUOTE(ChrisFoley @ Aug 29 2025, 10:00 AM) QUOTE(Superhawk996 @ Aug 28 2025, 06:59 PM) QUOTE(wonkipop @ Aug 28 2025, 07:39 PM) Whew!! I was getting worried about where to find mechanical properties of copper berrylium and having to measure the thickness. (IMG:style_emoticons/default/lol-2.gif) .0029" is close enough. Fully hardened. (IMG:style_emoticons/default/biggrin.gif) (IMG:style_emoticons/default/WTF.gif) Chris wants the maff (IMG:style_emoticons/default/happy11.gif) I found mechanical properties for UNS C17200 beryllium copper alloys @chrisfoley Can you give me the inside diameter of the MPS housing and/or the ring that secures the diaphragm? (Sorry I don’t want to tear MPS down to get this dimension). Marked up in green. We can do a simple shear case to see what psi it would take on the diaphragm to start to shear it. That’s an easy one. The reality is that beryllium is brittle (as an element) and copper work hardens as it flexes back and forth. No easy calculation to work out how it fatigues but l’ll give it a go to see how much differential pressure it would take in theory to blow out a diaphragm.  |
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| FlacaProductions |
Aug 29 2025, 02:17 PM
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#103
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Advanced Member Group: Members Posts: 2,019 Joined: 24-November 17 From: LA Member No.: 21,628 Region Association: Southern California
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Here's the AI-assisted plot @emerygt350
First time messing with feeding AI some data points so it's not very refined because neither am I.  |
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| emerygt350 |
Aug 29 2025, 04:13 PM
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#104
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Advanced Member Group: Members Posts: 3,177 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
QUOTE(FlacaProductions @ Aug 29 2025, 02:17 PM) Here's the AI-assisted plot @emerygt350 First time messing with feeding AI some data points so it's not very refined because neither am I. Looks good. I would prefer to see the bump a little earlier than 2 but I have seen that in others. Can't find my own curves at the moment ( only have my phone). I suspect you are going to be rich at wot. Bringing in the full load stop and leaning the inner will probably change some stuff when you get there. |
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