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  1. SAITAETGrad

    What's Your Favorite Out of Print Reference Book

    What book do you think the world needs back in print? (Other than Bruhn)
  2. SAITAETGrad

    Canadian Iron Ring Ceremony Under Review

    This was the inflection point: Link Commentary: Link Under Review: Link Engineers Canada: Link I don't understand the philosophy. If the current ritual is not inclusive enough, what ritual would be? It is a ring intended to be worn on a hand. For those without hands should they see...
  3. SAITAETGrad

    State of Art Technology for Lug Bushings

    I was recently talking to somebody who claimed the US Navy was using ceramic bushings in bushed a/c lugs to prevent corrosion in a marine environment. But I wasn't able to dig the details up for this. Seems like few ceramics would be up to the task. Ceramic coatings maybe. Question: what would...
  4. SAITAETGrad

    Service History Based Approach to Damage Tolerance

    Does anyone know a good reference for developing an inspection interval based on found cracks? I had one suggested to me recently with a lot of obvious problems. It's not an approach I'm familiar with as I have minimal experience with correcting service difficulty it DT structures. If possible...
  5. SAITAETGrad

    Austenitic Stainless Steel with Aluminum Extrusions in Aircraft Structure Subject to Cyclic Loads

    Has anyone here seen 1/2 hard 301 SS used for crack or corrosion related repairs to aluminum extrusions subject to cyclic loads? Seems to me this is high risk for corrosion fatigue and maybe even SCC with any clamp-up issues. Scares me. Not sure where to start with a life knockdown. I see a...
  6. SAITAETGrad

    Color Wire Code Abbreviations

    We have our own internal wire code code abbreviations that our team is standardized about. This has been questioned. A very brief review shows that there are electrical industry standards that vary from the basic Y14.38 abbreviations for colors. See attached ("internal" is ours). I'm sure there...
  7. SAITAETGrad

    Significant Standard and Part Numbers - Provisions of Alternates by Under-Definition

    Hi CM experts. I tried to search out a solution to my problem but came up dry. For standard and commercial parts with significant part numbers, is it ever reasonable to not fully define the part number to imply alternates? One example would be discrete fasteners which are available with...
  8. SAITAETGrad

    Maximum Inertial Load

    See image. The blue & orange curves represent + ultimate load factor curves for the shorter, lighter model of a type. The grey and yellow is for the longer, heavier model of the same type for which I just have some tabulated data. Both derivatives share common cg (x394). The shorter model...
  9. SAITAETGrad

    Panel Discussion on Whistleblowing

    Worth a listen: Link Real stories in engineering and other professions.
  10. SAITAETGrad

    Laser Cutting Aluminum Parts

    Pardon my ignorance. How do you get to .605 and .613 compliance with laser cut holes on aluminum parts? Is there any commercial or military process specifications that others use? My application is strictly static strength with 6000 and 7000 series aluminum. The capabilities of a local...
  11. SAITAETGrad

    Wing to Fuselage Fairing Composite Panel - Loads

    So a wing to fuselage fairing has many loads - if it is a high wing, you will have technicians standing on it - there's bird strike and other discrete damage - air loads naturally. What about rapid decompression? What effect does a single bay failure have on these panels? Presumably that blows...
  12. SAITAETGrad

    Slight Moisture Ingress into Sandwich Panel

    Is this a method of sandwich panel cutting people are familiar with? Link
  13. SAITAETGrad

    Ideas on Environmental Assessment in the Mining Industry

    An interesting topic. Link
  14. SAITAETGrad

    Training - Aircraft Structural Analysis

    This course will be of interest to many: https://www.linkedin.com/pulse/training-aircraft-structural-analysis-asa-i-ed-doetzel?trk=hp-feed-article-title-publish
  15. SAITAETGrad

    Parallella

    Does anyone have an opinion on how difficult it would be to route a Nastran solution through this board? Link
  16. SAITAETGrad

    Easy Jet Speed Tape Story

    I'm curious to hear what others think of this story: [link http://www.inquisitr.com/2130781/engineer-snapped-fixing-broken-plane-with-tape-minutes-before-take-off/]Link[/url] Paint erosion is suggested, then concern about a gap due to mechanical damage is suggested. Does this pass the sniff...
  17. SAITAETGrad

    Most Popular Metric Fasteners

    Some avionics guy decided to install metric nut plates inside his box for mounting... What are the most popular metric fasteners used on aircraft? Would a DIN standard be suitable for meeting 25.613(e) at Amdt 112? Which NA00 fasteners are most popular and are LN series more available in North...
  18. SAITAETGrad

    PSOLID "Integration Network"

    What is an "integration network" and specifically how is this implemented with FEMAP? Can't find much in any of the FEMAP/NX/NEi documentation. This information is not translated for the NASTRANs (per FEMAP documentation) which I use. Some suggestion this is related to contact analysis? I'd...
  19. SAITAETGrad

    Fail 12 Second Vertical Test, Pass 60 Second Vertical

    Just experienced some interesting feedback from our flammability engineer. A 12 second vertical test (FAR 25 Appendix F Part 1 (a)(1)(ii)) burned a couple inches and failed to self extinguish in 15 seconds and therefore failed the criteria. Another sample was applied to the 60 second test (FAR...
  20. SAITAETGrad

    Jiro Horikoshi - Japanese Aeronautical Engineer - Biopic Animated Film "The Wind Rises"

    I thought many people on Eng-Tips would enjoy this: Link

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