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  1. FranAle

    400 Hz GPU

    Hi Alansam: check http://www.hobartgpu.com/Hobart%20PDF%20files/GPU%20400.600%20309%20AGE.pdf We have on our facility floor some GPU 400 series units. These type of carts may be plugged onto electrical net of hangars or general standard aviation facilities. You avoid issues about batteries and...
  2. FranAle

    MTBUR/MTBF for variable populations

    Peter: Sometimes is quite useful to segregate (isolate) the sample or population by ranges (same or similar failure rates) or by types inside de configuration of the aircraft, for example by their ATA 100 codification if it is commercial or by WUC(work unit code) for military. Remember that...
  3. FranAle

    spinner drag

    Gerrigroot I'd try Roskam series. It contains a lot of drag estimations for shapes when you are in the design step. regards, FranAle
  4. FranAle

    Info on BAC Strikemaster MK-89

    Thanks Andries: I'm aware about the info you provided. In this case, cracks are located in the aft spar of the vertical fin and they show a typical fatigue pattern. I think that a restore the original strenght process is the most affordable approach to this problem. Off course SRM and standard...
  5. FranAle

    Info on BAC Strikemaster MK-89

    Thanks Kenat: By the way, you are right about BAe System, unfortunately knocking that door have not given the results I expect. The operator is requesting the support but the documentation they have about the repair, adresses to that dwg. I also checked the Civil Aviation Safety Authority...
  6. FranAle

    Info on BAC Strikemaster MK-89

    Hi to all: I'm working on a repair in old jet acft, the BAC Strikmaster MK 89 international version. After som research, SRM calls a drawing no longer available. Does anybody know the nomenclature DWG K-167-03-299? and if you have any clue how to step forward in order to retrieve more...
  7. FranAle

    free propeller efficiency (analytic)

    Check the Roskam'series books, they have good plots and data for propellers. I hope this works for you. FranAle
  8. FranAle

    Drag chute test

    Thanks IRstuff for your quick answer. now I have some homework to do. It was exactly what I have been looking for. Very helpful. Thanks again. FranAle
  9. FranAle

    Drag chute test

    I'm dealing with a 20000 pounds acft, single jet engine. I intended to set a complete test for a new drag chute for this acft. Does anybody know a MIL spec, NASA or FAA documents, etc about test procedures on drag chutes? Any clue will be appreciated.
  10. FranAle

    Turbine Engine Surge Stall

    Hi, guys Some devices to prevent surge is to allow the air flow go downstream trought the compressor. This systems are known like bleed air valves or air bleed port. They light the pressure in order to gain air momentum of the air mass flow downstream. Fran Ale
  11. FranAle

    crack growth data

    Groveri: Also try AFGROW, USAF reference data for fracture and fatigue analysis. Email me if you need this package. Good luck. Fran Ale
  12. FranAle

    king air undercarriage problem

    IMAC09: I´ve been working in a100 and be200 for a while. I recommend you, make a isolation check where the ground bonds are. Check the AC43-13B Electrical Systems provided by FAA. You will be surprised what you find.Good luck FranAle
  13. FranAle

    Landing Gear shock absorbing leg design

    Hi, I suggest you check "landing gear for light aircraft" written by Pazmany. It solve your doubts and give many clues about design and solutions. Francis
  14. FranAle

    Fuel Nozzle Coking

    I have some experience in TPE331 gas turbine engine.Coking is feature present in some fuels, but you should check the materials´s bearing aft the turbine stage, some are ceramics, it means you should examine the oil quality and of course check the inspection intervals. FranAle
  15. FranAle

    Aircraft Design Courses

    FastMouse I took the pregrade course taught by mister Raymer, and was great, mainly due to very simple Raymer´s approach. It was clear and easy to follow, but I found it a little bit slow, specialy regarding to graphs and data already displayed on the book and by himself. To clarify you, I...
  16. FranAle

    MIL PRF 5606 foam contamination

    Aviat We made tracking for oil hydraulics samples and correlated samples taken directly from aircraft, after landing and others taken from the same A/C with no engine running and guess. Lab was cheating us because they were using the method for ASTM D 892 as they think it may. We changed lab...
  17. FranAle

    The End of Mil-Hdbk-5

    Sparweb Thanks for "the light HBK-5 replacement" I have already checked out your version and of course, the question of my coleagues are : all the paperwork related with FAA documents (AC43.13B,ACs, etc)will be re edited to get a reference in the new AR-MMPDS-01? Thanks Francis
  18. FranAle

    MIL PRF 5606 foam contamination

    Hi Aviat Thanks for your comments. I'll let you know our findings when we track more samples with your approach. Francis
  19. FranAle

    Manhour estimation

    Hi Clun In my experience in a 20 a/c fleet and 18 helicopters you can estimate your labortime through 2 different ways: 1.- By crittical dues (your most esperienced mechanic time) 2.- By influence dues (nothing happens if you put some task before or after any) After you state one of this...
  20. FranAle

    MIL PRF 5606 foam contamination

    Hi everybody A 3000 psi hydraulic system of an aircraft don´t pass the test for foam occurrence (max 60 ml under certain crcunstances for testing) My company spent time and many MIL PRF 5606 drums trying to figure out what is happening. We covered several issues related like temperature...

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