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  1. peaktop

    New engineer feeling like failure

    It's interesting how "teamwork" doesn't refute concerns about lowered standards. This is especially apparent when teamwork is combined with "balance," as if positive teamwork balances negative low standards. The argument is "We're not lowering standards, but, even if we were, you need to be a...
  2. peaktop

    New engineer feeling like failure

    "The hardest people to work with are the straight 'A' students that have no concept of balance" is not "talking about lowering your standards" as "My kid can beat up your honor student" is not talking about lowering your standards.
  3. peaktop

    New engineer feeling like failure

    None of us can *be* perfect. All of us can (should) *strive* to be perfect. There's a huge difference between a standard of perfection and recognizing that decisions made on incomplete information are necessarily imperfect. The question is how to make decisions given incomplete information...
  4. peaktop

    New engineer feeling like failure

    zdas is on target. Life is shades of gray (and I don't mean life is drab and dreary). Almost anything we do is done with incomplete information. This applies to "we" as human beings, not just as engineers. Acting on incomplete information has a rational aspect and an irrational aspect. On...
  5. peaktop

    New engineer feeling like failure

    Perhaps the OP could explain what types of decisions he's "forced to make." Is this a "project management" issue or an "engineering design" issue? He talks about "having to learn ALL of the state reporting/materials/documentation/specs all at once and try to pull the project together" and "any...
  6. peaktop

    mass flow rate test bench

    Here are some Eng-Tips threads that may be relevant: http://www.eng-tips.com/viewthread.cfm?qid=203947&page=17 http://www.eng-tips.com/viewthread.cfm?qid=220696&page=1 These threads touch on the basis for my question: what are you exhausting from? If you're exhausting an internal combustion...
  7. peaktop

    Error in "Handbook of Hydraulic Resistance," I.E. Idelchik

    Thanks. BTW, the graph in Diag 4-12 is taken from Idelchik's 1960 paper (Reference 30 on p. 537 of the 3rd edition). PT
  8. peaktop

    Error in "Handbook of Hydraulic Resistance," I.E. Idelchik

    Tabulated values for tau agree exactly among 2nd, 3rd, and 4th editions. 2nd edition does not give a formula for tau, but a graph is given in Diagram 4-12. Does that graph look like the red curve in my file, Idelchik_tau.jpg? PT
  9. peaktop

    Error in "Handbook of Hydraulic Resistance," I.E. Idelchik

    Moving files from flickr.com to engineering.com: http://files.engineering.com/getfile.aspx?folder=b7a16c07-c6d5-45fc-a125-1fe27eea578c&file=Idelchik_Diag8-3.jpg http://files.engineering.com/getfile.aspx?folder=56ec3d01-3383-4571-9b2c-a0f6f3e99f04&file=Idelchik_tau.jpg
  10. peaktop

    Error in "Handbook of Hydraulic Resistance," I.E. Idelchik

    You wrote, "the form of the equations has changed to that of the 2nd Edition." Do you mean the form has changed *from* that of the 2nd Edition? Can you provide the 2nd Edition form of the equations for tau and phi? Thanks. PT
  11. peaktop

    New engineer feeling like failure

    Forget about the perfectionism comment. Your goal is NOT to lower your standards, but, rather, to improve your knowledge and skills. I've been an engineer for over 25 years, and I still bristle whenever some old guy tries to tell anyone to "lower your standards." Sometimes you have to...
  12. peaktop

    Error in "Handbook of Hydraulic Resistance," I.E. Idelchik

    See images at http://www.flickr.com/photos/52974733@N08/ To avoid copyright issues, I'll remove these images once others have a chance to verify my claim. Regards, PT
  13. peaktop

    Error in "Handbook of Hydraulic Resistance," I.E. Idelchik

    I don't have 2nd edition. Can you compare the formula in the 2nd edition with the correct formula above? Also, can you use the formula in the 2nd edition to check the values in the corresponding table. Regards, PT
  14. peaktop

    Error in "Handbook of Hydraulic Resistance," I.E. Idelchik

    The formula for tau in Diagram 8.3 of the 3rd and 4th editions should be (2.4-l.bar)*10^(-phi(l.bar)). The values in the table are ok. Fudd's First Law of Opposition: "If you push something hard enough, it will fall over." Teslacle's Deviant to Fudd's Law: "It comes in, it must go out."
  15. peaktop

    mass flow rate test bench

    What are you exhausting from? Can you just measure the mass flow rate at a location upstream from (and cooler than) the test section? PT Fudd's First Law of Opposition: "If you push something hard enough, it will fall over." Teslacle's Deviant to Fudd's Law: "It comes in, it must go out."
  16. peaktop

    Unsteady state conduction of heat in a cylinder

    It appears that different authors have different nomenclature for Tinf, T0, Ti, etc., but all seem to agree that dimensionless temperature is final temperature excess divided by initial temperature excess. In your case: T0-Tinf == Final temperature - Ambient temperature = 30 - 32 Ti-Tinf ==...
  17. peaktop

    Security Clearance and Non Clearance Jobs

    Satchmo is right -- "As long as your record is clear... having family in Russia is [not] a show stopper." Where I work, MS is not necessary for entry level engineer, but an MS is very helpful to advance your career once hired. Also, for any prospective employer, check whether there are local...
  18. peaktop

    Unsteady state conduction of heat in a cylinder

    One more. http://www.me.umn.edu/education/courses/me8341/modules/Mod-10.pdf Also, lots of hits when googling 'Heisler Grober'. Good luck. PT Fudd's First Law of Opposition: "If you push something hard enough, it will fall over." Teslacle's Deviant to Fudd's Law: "It comes in, it must go...
  19. peaktop

    Unsteady state conduction of heat in a cylinder

    Also: http://en.wikipedia.org/wiki/Heisler_Chart Fudd's First Law of Opposition: "If you push something hard enough, it will fall over." Teslacle's Deviant to Fudd's Law: "It comes in, it must go out."
  20. peaktop

    Unsteady state conduction of heat in a cylinder

    Take a look at this: http://www.mhtl.uwaterloo.ca/pdf_papers/mhtl96-8.pdf Regards, PT Fudd's First Law of Opposition: "If you push something hard enough, it will fall over." Teslacle's Deviant to Fudd's Law: "It comes in, it must go out."

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