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Recent content by Tom584

  1. Tom584

    Tapped Holes

    Troy,<br> <br> You can find the book at Barnes and Noble. The book can be shipped within 24 hours. It cost nearly $200.00. I know it is worth it. It is a large book and a very good treatment of bolted joints. I have pasted the book listing below. Look at <A...
  2. Tom584

    Tapped Holes

    Have you tried Barnes and Noble online. Most engineering books I look for I find through them. You may also find it through the ASME book club. You can always contact Dekker, the publisher.<br> <br> I will search the Barnes and Noble site tonight. <p>Tom Worthington<br><a...
  3. Tom584

    Tapped Holes

    trallee,<br> <br> There is a publication that answers your question. The book is &quot;Introduction to the Design and Behavior of Bolted Joints&quot; by Bickford. It is published by Dekker. You can also find it through ASME. They use Bickford's book in their Bolted Joint training coures. I...
  4. Tom584

    Fixed power with different ambient temperature

    CurtisMTK,<br> <br> If I understand your problem statement, as the ambient or heat sink temperature increases, the differential temperature between the temperature of the surface of the resistor (T) and ambient temperature (Ta) goes down.<br> <br> As Ta increases, what effect does this have on...
  5. Tom584

    TELESCOPE LASER ALIGNMENT SYSTEM

    I need to design/build/buy a laser alignment system for a 9.2 meter telescope. The primary mirror consists of 91 mirror segments. 90 segments are adjustable in tip, tilt and piston. The laser alignment system is for building and maintaining the telescope mount model. The assembly must fit at...
  6. Tom584

    losses from valves/bends

    Hey Paul,<br> <br> I agree with Ralph. Another source of information is the Crane Technical Paper 410. It can be obtained from Crane. They also have a Windows based program for solving such problems. The software looks up all the information based on your input of fluid, fluid temperature...
  7. Tom584

    Moisture on Final Filters in Blow-through AHU's

    LeaderP,<br> <br> The air leaving your cooling coils is at 100% relative humidity (saturated) if there is any condensation occuring in the cooling coil. If the air handler cooling coil valve is modulating, the filters will be colder than coil discharge air when the cooling coil valve closes...
  8. Tom584

    PRESSURE DISTRIBUTION (Cp) AROUND A TELESCOPE DOME

    I'm attemping to model the air pressure distribution around a spherical telescope dome due to wind.<br> <br> Air flow through the dome improves &quot;seeing&quot;. By modeling the air pressure distribution at given wind speeds, we may be able to optomize the dome to improve air flow and...
  9. Tom584

    Cryogenic Lens Mounts

    William,<br> <br> Have you considered using invar as a material for your mounts? It has a very low coefficient of thermal expansion; however, it does corrode with moisture so it will have to have a surface treatment. <p>Tom Worthington<br><a...
  10. Tom584

    Leaking head gaskets in a large heat exchanger with high delta-T's

    The ASME offers a bolted joint course based on a book called &quot;Introduction to the Design and Behavior of Bolted Joints&quot; written by a gentleman named Bickford who spent his working lifetime studying bolted joints. He has solved many problems for the nuclear industry sealing difficult...
  11. Tom584

    Failure of Mechanical Seals

    I am in engineer now, but spent over 20 years as a knuckle buster. The main causes of seal failure that I have seen, assuming the pump and seal designers did a good job, are improper handling of the seal at installation, improper installation of the seal or improper operation of the seal...
  12. Tom584

    Allowable Stresses

    MikeVV is correct. Additionally, you will have to increase the inspection of your material for manufacturing flaws and add stress concentration factors for flaws that may escape detection. ASME, based on code dictated inspections, accounts for flaws that may have escaped detection. The...
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