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  1. Benbarca7

    Preload additive to flight loads?

    Hi everybody, I have a question regarding the preload, for Nacelle latches for example. We usually preload the latches by compressing two surfaces against each other. The flight loads have to overcome the preload and then the load in the latch increases. the new fatigue spectrum would be...
  2. Benbarca7

    747-8 aborted take-off test

    thanks for the link, this is impressive Ben Nacelle Stress Engineer (repair on Civil Aircraft)
  3. Benbarca7

    Stress engineer in the US

    ahah I just translated it literally from how it is said in my country. but thanks for the correction. Ben Nacelle Stress Engineer (repair on Civil Aircraft)
  4. Benbarca7

    NDT of large surface area thick laminates

    Can you find in the SRM what control to apply to find delamination on the panel? I was thinking that tap test was for disbond, not delamination. For delamination of plies the first thing that comes to my mind is a Ultra sonic inspection, I think you can do it on large structure but it can take...
  5. Benbarca7

    Stress engineer in the US

    lol ok I stop! I am located in the north east... I am pretty sure California and Washington would pay more. I finally got the job I am very excited to begin! Thanks for your contribution you all Ben Nacelle Stress Engineer (repair on Civil Aircraft)
  6. Benbarca7

    Stress engineer in the US

    Thank a lot everybody, the interview went well, I am waiting for a response now. Your info were really helpful, we just talked about a range which was what everybody proposed here. If they choose me we will be discussing salary. Hope I am gonna have an offer. And rb1957, I dont want to look...
  7. Benbarca7

    Stress engineer in the US

    Hi, I have a question for aircraft engineers, but it's not question about analysis this time. I am new in this country (US) and I just applied to a job. I have an interview this week. The job fits perfectly with my work experience. It is a position of a stress engineer on aircraft nacelle. I...
  8. Benbarca7

    Bearing load augmented due to a shim

    Looking at your first post rb1957, I think this is what has been done. 2.33 is 1t+2*2/3 t. o I think this is done because the shim is not structural and the stress distribution should be only in the external plies, and nothing in the shim. It is a triangular distribution with an offset due to...
  9. Benbarca7

    Bearing load augmented due to a shim

    Hi guys, thanks for the replies. Before responding, I will provide the previous page, I think it can help. http://files.engineering.com/getfile.aspx?folder=bd507cfe-1445-4b05-bb24-2ecfffcd3852&file=bearing_load_pg1.jpg Then, I will add that this is a training, so it is not exactly very...
  10. Benbarca7

    Bearing load augmented due to a shim

    Hi all, I am doing a repair engineering training for civil aircraft repairs and I am not sure to understand what is exactly done here. It is an example to show the influence of a shim between two joined members. The example assumes a P=2000lbf load transfered from one plate to the other by two...
  11. Benbarca7

    US Airforce new tanker

    The tanker will be equiped by P&W engines. Is it the PW 4000 serie engine or the JT9D, or both? Ben Nacelle Stress Engineer (repair on Civil Aircraft)
  12. Benbarca7

    US Airforce new tanker

    Airbus would also have been good for the country I think as they would have created a lot of job here (building a FAL, they have an engineering center here and would have a lot of american partners). Ben Nacelle Stress Engineer (repair on Civil Aircraft)
  13. Benbarca7

    US Airforce new tanker

    Is this the LAST decision or can Airbus appeal again? Ben Nacelle Stress Engineer (repair on Civil Aircraft)
  14. Benbarca7

    Airbus dent dress-out

    And if you still doubt, you can always ask to the SRM owner, and discuss with him if it is contradictory or unclear. The SRM is updated several times in a year, so if a mistake is found they can correct it. Ben Nacelle Stress Engineer (repair on Civil Aircraft)
  15. Benbarca7

    Is modifying a PW4000 T/R from a 767 to a 747 possible?

    T/R are rotable parts. What is the engine? I suppose that if it is an GE 80C2. Middle River is doing the T/R. If it is a PW 94" I suppose it would be Goodrich. You should ask to boeing or the T/R manufacturer to know the interchangeability. As cd27idw said, the manufacturer or boeing should...
  16. Benbarca7

    FCBS/FCAS handling

    I agree with rb1957 FCBS Items are subjected to far 25.571 so if a MRO does a repair on a FCBS location they have to satisfy the regulation, meaning providing the Dam Tol Analysis. It is operator's responsability to make sure that the DTA for repairs on FCBS location done by the MRO. And no...
  17. Benbarca7

    US Airforce new tanker

    Oops sorry for making a double. thanks IRstuff, I'll try to find the previous thread. lol mike! Ben Nacelle Stress Engineer (repair on Civil Aircraft)
  18. Benbarca7

    Airbus dent dress-out

    Not all dents are depth dependent. Usually, we consider a dent as a hole. so the depth has no influence. but some analysis can consider a real dent, modeled with finite element, where a depth/diameter ratio is taken. It really depends on the method that has been used to justify the dent. As...
  19. Benbarca7

    US Airforce new tanker

    The U.S. Air Force announced Thursday that it has selected Boeing’s NewGen Tanker to be its new KC-46A air refueling jet. It will be based on the B767. it was in concurrence with the A330 of Airbus. The contract is about 35 billions dollar. What do you guys think of it? Do you think Boeing...
  20. Benbarca7

    Airbus dent dress-out

    Where is the damage located? Are you in areodynamic flowpath I would say, it is not explicitly saying that you have to dress out. The definition of an allowable damage is that you dont need a repair, but if a small repair it is explicitly said, like in a requirement column where it is written...

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