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Recent content by Nigel

  1. Nigel

    Strength of lugs in fatigue

    Thanks amorrison4, but I don't believe that is the correct report. I have already found that one. Nigel Waterhouse B Eng (Hon's) Can-Am Aerospace,LLC, Canadian Aircraft Certification Centre www.canamaero.com
  2. Nigel

    Strength of lugs in fatigue

    RB1957, I am not seeing the hit on Yahoo, perhaps you can post the link? Thanks, Nigel Waterhouse B Eng (Hon's) Can-Am Aerospace,LLC, Canadian Aircraft Certification Centre www.canamaero.com
  3. Nigel

    Strength of lugs in fatigue

    Mantiticore, Well I least I know it WAS available, thanks for letting me know. When you are next sat at your other machine perhaps you could send it to me or at least post the link. Thanks, Nigel Waterhouse B Eng (Hon's) Can-Am Aerospace,LLC, Canadian Aircraft Certification Centre...
  4. Nigel

    Strength of lugs in fatigue

    RP, I wont hold my breath, but I would certainly appreciate it if would have a quick look for it. Nigel Waterhouse B Eng (Hon's) Can-Am Aerospace,LLC, Canadian Aircraft Certification Centre www.canamaero.com
  5. Nigel

    Design "g" for commercial helicopter

    Depends on the flight condition. Ultimate positive maneuvering load factor is 5.25g. Emergancy landing is 20g down. http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgFAR.nsf/0/9DEF90770C26A3EC85256613006B2A8B?OpenDocument...
  6. Nigel

    Strength of lugs in fatigue

    I am trying to find a copy of, "The Strength of Lugs in Fatigue" by R.B Heywood, Technical Note No. Structures 182, Jan 1956, Royal Aircraft Establishment. Can anyone help? Thanks in advance. Nigel Waterhouse B Eng (Hon's) Can-Am Aerospace,LLC, Canadian Aircraft Certification Centre...
  7. Nigel

    Civil AirRegulations CAR's

    Handy to have it all organised like that. It is all available on the FAA website also. http://dotlibrary.specialcollection.net/ Nigel Waterhouse B Eng (Hon's) Can-Am Aerospace,LLC, Canadian Aircraft Certification Centre www.canamaero.com
  8. Nigel

    1.5 factor of safety?

    All these comments are good, but they don't answer the question. I have been through all the early regulations, all the way back to the late 30's, and 1.5 has always been there. I cannot believe they started at 1.5, since most common factors of safety are around 4 to 5. Nigel Waterhouse B Eng...
  9. Nigel

    1.5 factor of safety?

    Ok, here is a question. How did the FAA settle on the 1.5 factor of safety? Did it come from the proposed handbook for airplane design Oct 1927? Or does it even have it's origins in aircraft design? Anyone have any idea? Nigel Waterhouse B Eng (Hon's) Can-Am Aerospace,LLC, Canadian Aircraft...
  10. Nigel

    Equivalent elastic modulus

    Why is the plate coated in lead? Nigel Waterhouse B Eng (Hon's) Can-Am Aerospace,LLC, Canadian Aircraft Certification Centre www.canamaero.com
  11. Nigel

    Non-Disclosure Agreements

    NDA's are like locks, they keep honest people honest. They also ensure an understanding has been reached before business is conducted. If you don't feel you can trust someone with your IP, an NDA is not going to help you. Remember, you can't fence in a snake! Nigel Waterhouse B Eng (Hon's)...
  12. Nigel

    FYI - Flutter videos here

    Great flutter shots, I especially like the Twin Com'. Nigel Waterhouse B Eng (Hon's) Can-Am Aerospace,LLC, Canadian Aircraft Certification Centre www.canamaero.com
  13. Nigel

    The End of Mil-Hdbk-5

    Is anyone going to protest by purchasing it and making it available for download? Nigel Waterhouse B Eng (Hon's) Can-Am Aerospace,LLC, Canadian Aircraft Certification Centre www.canamaero.com
  14. Nigel

    c.g. shift on freighter aircraft

    There are no regulations relating to this that I know of. You need to be conservative and take into account the potential for shifting. This depends a lot on the design of the restriant systems and the loading instructions. I am aware of an FAA rule of thumb being 5%. At the end of the day...
  15. Nigel

    cargo floor net

    If the net is attached to the floor at 4 points, the reactions are going to be related the nets deflected shape and the angle of the individual straps, which will differ depending on their location, either fwde or aft. You will need to come up with a worst case for the net and the straps and...

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