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Recent content by aviat

  1. aviat

    Roll of steel cleanliness in failure

    I have the same book that NickE has, and I have seen what he refers to. I have seen other books on Failure Analysis that repeat the same precaution as regarding mating the broken pieces together. Also the labs tell us not to assemble the pieces as in the site below that says under mechanical...
  2. aviat

    Triming Ti Honeycomb

    A router will probably work. Make some guides out of wood or similar material to use as a guide to get the correct angle. For more info see AC 65-15A – chapter 5 - page 202-203 at this site...
  3. aviat

    [b] Friction COefficients [/b]

    Rubber doess't have a single CF. It depends on temperature and other things. Here is a link that shows ways to compute it. Scroll down to friction measurement: http://www.tribology-abc.com/abc/default.htm
  4. aviat

    Corrosion in Al heat sinks with water channels

    The mixture should be checked yearly, even if only a PH test because the additives wear out. http://www.polarislabs1.com/source-water-levels.htm These sites are from an engine system but are applicable to other systems. If you have a bad ground or other electrical problem, it can set up stray...
  5. aviat

    How should I build the driveline?

    There is a vehicle called an Argo which is similar to your idea. It uses a skid steer and chain drive. You may be able to get some ideas from it. http://www.4x4mag.co.uk/marfeatures/magargo.html
  6. aviat

    cargo floor net

    Chapter 12 of AC 43.13-2A has some information.
  7. aviat

    Shaft fracturing

    RUFUS2K Have you considered the effects of accelerating or decelerating your compressor? Because the drive is geared up it makes it more than steady running. Aircraft components are designed with the idea to keep the mass down, more than commercial and automotive components. Even if you do not...
  8. aviat

    Exhaust gas Temperatures

    Your turbine is a restriction in your exhaust system (approx. 8” Hg). When the gases come down the pipe and encounter this restriction they slow down, and the pressure and temperature go up as per Bernoulli’s principle. How much pressure you get depends on the speed of the compressor, which...
  9. aviat

    Use of Banjo Fittings in Diesel Fuel systems

    Woodward has been making governors and fuel control units for many years using banjo fittings, but they don’t screw the steel fitting directly into aluminium. They use an insert that prevents the pick up you are concerned about. Steel screwed into aluminium acts like a tap and cuts its own...
  10. aviat

    FMVSS/CMVSS 302 - Flammability of Wooden Cabinets

    Here is one company that has a product, but they have a minimum order. If you can't find an automotive supplier to get smaller quantities, you could check with companies that do aircraft interiors, because they may be able to help you. http://www.acoustakleen.com/flamesorb.htm
  11. aviat

    Shear shaft on IO-550

    Yes the pulses of the engine may cause the problem. There is some info on the site below, but it would be better if you call them and ask for John. He know those engines really well. http://www.sacskyranch.com/vibm.htm
  12. aviat

    Shell Thickner (Doubler) Stress Concentration Effects

    jeffhmc: There is a failure mode called acoustic fatigue, which occurs in ducts. It has been known about for a long time, so you should be able to find some information. First. Have you determined that this is a fatigue failure? Does it have the beach marks? You say that your rod is a tie...
  13. aviat

    Solving for Wetbulb Temperature with Excel

    Someone has already done that at: http://www.4wx.com/wxcalc/rh.php
  14. aviat

    Volumetric flow rate for jet fuel

    To get your flow rate just set ups the pumps and valves the way you want to measure. After it pumps for a few seconds record fuel in #2 tank and start a stopwatch. Let it run for 5 to 10 minutes then record the quantity in #2 again. Find the difference between the two readings and divide by the...
  15. aviat

    Volumetric flow rate for jet fuel

    Those pumps are designed to slip when at pressure. As you know the way they are tested is to dead end in a manifold and read the pressure. As long as it meets the min pressure, it will provide the required flow for one engine. As pumps wear they are able to provide less flow. How much flow you...
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