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Recent content by chuck1

  1. chuck1

    Bushing Tolerances

    Two excellent sources for bushing tolerances/fits are ANSI B4.1, American National Standard for Preferred Limits and Fits for Cylindrical Parts, and, if you are working with British aircraft, BS 1916 (inch) or BS 4500 (metric).
  2. chuck1

    Substituting 2024-T42

    MIL-H-6088 is the heat treating spec used by the mills. For in-house heat treating of aluminum, the correct spec is AMS 2770. Chuck
  3. chuck1

    Knife Edge Countersinks

    Russ, I know that when I worked at McDonnell Douglas, the design allowables for aluminum flush head rivets installed in machine-countersunk sheet with greater than 70% depth of countersink were reduced. The reason was that head tilting will occur under relatively low loads, which adversely...
  4. chuck1

    Bucking of Rivets in Machined Parts

    Hi Gerryy! Solid rivets require high forces for installation which can, in some cases, damage rigid structure such as machined flanges. This is especially true for the vibration driving of titanium, A-286 and Monel solid rivets. The vibration driving of aluminum rivets require only moderate...
  5. chuck1

    Aluminum Bronze

    Thanks, Guys, for the info and thoughts. I've decided to use C63000 nickel aluminum bronze per AMS 4640 Condition TQ50 in lieu of the C63020 per ASTM B150. I'm assuming that Fcy=Fty (68 ksi, obtained from ASM Metals Handbook, Vol 2). I hope to convince the FAA that the C63000 is as strong as, or...
  6. chuck1

    Pressure Box Test

    Thanks, guys! I appreciate the reponses.
  7. chuck1

    Aluminum Bronze

    Will: I screwed up, they're Hawkers not Falcons (too many projects in my pile). Chuck
  8. chuck1

    Aluminum Bronze

    Hi Will! Thanks for the info. My problem is that I need a material that is equivalent to the British Spec DTD197. I had a couple of existing bushings (these are on Falcon aircraft, by the way) chemically analyzed. The result is that the chemical analysis showed that C63020 is the equivalent. My...
  9. chuck1

    Pressure Box Test

    We are looking at replacing a metal fairing with a fiberglass laminate and the FAA wants us to do a "Pressure Box Test." I can't find any literature on it. Is it a static test or fatigue test? I assume that it is associated with the dynamic pressure at altitude but I don't know if it...
  10. chuck1

    Wrought aluminium

    Jim: Have you looked at MIL-T-9046 and MIL-T-9047? They should give you strength values for both wrought and forged titanium.
  11. chuck1

    Aluminum Bronze

    I need the compressive yield strength for C63020 nickel aluminum bronze bar in order to calculate bushing yield. Does anyone know where I can find this information? MIL-HDBK-5 and any of the websites give only tensile properties. Also, is there any other way to calculate bushing yield strength...
  12. chuck1

    Spin Dimpling

    Hawker Siddeley specifies spin dimpling for their fuselage skins. Does anyone know what this process entails? Also, would hot dimpling be an acceptable substitute? Thanks, Chuck
  13. chuck1

    S154 Steel Die Forging

    Does anyone know if there is a US equivalent for British S154 steel die forgings? All I can find is that it's classified as 57 ton 2-1/2% nickel-chromium-molybdenum steel. What I really need to know is its properties: Ftu and Fsu. Also, is it weldable? Thanks, Chuck
  14. chuck1

    uns C67000 manganese bronze

    Brian: Have you looked at C86300 manganese bronze (AMPCO 66) per AMS 4862? It has a min tensile strength of 110 ksi and a min yield of 60 ksi. Ampco Metal, fax 414-645-3225 Chuck
  15. chuck1

    Torque Settings

    FAA Advisory Circular 43.13-1B provides a table of torque values for various bolt/nut combinations.
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