Forum: Reliability & Maintainability Questions and Answers

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Posted by: Julien Nico (jnico@zodiac-group.com )
Organization:Aérazur - Zodiac group
Date posted: Mon Mar 27 10:56:52 US/Eastern 2000
Subject: Reliability for a missile equipment
Message:
We are currently designing a fuel cell for a missile (fuel cell made with rubber).
The missile shall be store during 20 years then launched. Our fuel cell is filled of fuel at the begining. The missile can be subject to underwing carried flights and be launched after 20 years. Time during launched phase is 10 minutes. I have to define the MTBF for the fuel cell. I don't know how to express the MTBF for the component. I can express a MTBF for the 10 operationals minutes but I don't know how to take into account the storage period. Is there a reliability means to express the storage period in the final calculation (fuel cell properties can changed during storage period).

Replies:
Fuel Cell Storage
Bruce Dudley Tue Mar 28 14:05:34 US/Eastern 2000

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Posted by: Jean Marie Cloarec (Jean-Marie.cloarec@ligeron.com )
Date posted: Thu Mar 23 12:23:13 US/Eastern 2000
Subject: Reliability data
Message:
I'm searching reliability information about optical components : lens, mirror, .... failure mode and failure data.
If you websites or if you have some informations .... thank you

Replies:
Lens/Mirror Reliability
Bruce Dudley Tue Mar 28 12:51:11 US/Eastern 2000

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Posted by: Bob Valerius (robert_m_valerius@md.northgrum.com )
Organization:Northrop-Grumman Oceanic Systems
Date posted: Wed Mar 15 9:25:07 US/Eastern 2000
Subject: reliability of crimp vs. solder type connections
Message:
Does anyone have any data on the reliability of crimp vs. solder type connections that is NOT from 217F? Thanks in advance.

Replies:
Crimp and Solder Failure Data
Bruce Dudley Mon Mar 20 15:42:17 US/Eastern 2000

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Posted by: Clay Davis
Date posted: Fri Mar 10 13:53:16 US/Eastern 2000
Subject: System Availability
Message:
Can anyone tell me of any good reference material on how to design and calculate availability (esp for a computer server)?
Thank you.

Replies:
Computer Server Availability
Bruce Dudley Tue Mar 14 14:46:47 US/Eastern 2000

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Posted by: Henry Davis (henry.davis@das.honeywell.com )
Organization:Honeywell DAS
Date posted: Tue Mar 7 15:46:55 US/Eastern 2000
Subject: Failure rate for mosfets
Message:
There was a previous question regarding failure rate models for MOSFETs. Does the prism tool support this now? I was unable to tell from a download of the sample. Is it necessary to purchase the prism tool to develop the failure rate for industrial temp range MOSFETs? What have others done when working with MOSFETs?
Thanks

Replies:
MOSFET Failure Rate
Bruce Dudley Thu Mar 9 8:43:40 US/Eastern 2000

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