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  1. gunsmith

    Thermodynamic Software

    I do not agree with You, IRstuff. The reports mentioned are "approved for public release", the source code is listed there and I can´t imagine what may be illegal on handing over these programs? BLAKE doesn´t calculate nothing else then CEA2 of the NASA - it only uses real gases instead of ideal...
  2. gunsmith

    Thermodynamic Software

    I am looking for two FORTRAN programs called BLAKE and BRLCB which were established by the ARL, Aberdeen Proving Ground, MD, to estimate propellant constants (BLAKE) and calculate the propellant´s dynamic vivacity from the pressure-time-data of a closed vessel experiment (BRLCB). The user...
  3. gunsmith

    how can i read values from excel into mathcad

    Did You ever try to change the settings in Excel 2003. It is possible to set the decimal separator to "point" instead of "comma". You can find it in "Extras" - "Optionen" - "International" in Excel 2003! Set it to "point" for the separator and disable "Trennzeichen vom Betriebssystem...
  4. gunsmith

    Eliminating Recoil

    To MLoew: This shows only standard design. For advanced users try http://www.roehrs.de/daempfungselemente.htm It is the best for gun-relevant demands! Andreas Nehme mail@waffentechnik.com
  5. gunsmith

    Exporting SW files

    Another information about the limits of CAD-data-transfer You can find at http://www.datenaustausch.com (German text) On sublevel "Produkte" you can find a link "Perfrormance Test" showing the horrible results of transferred geometry by different interchange formats...
  6. gunsmith

    Exporting SW files

    Go to http://www.elysiuminc.com/ there is an article about the theme You are searching for. Feature translating on CAD-systems is just in prototype-stadium! Andreas Nehme mail@waffentechnik.com
  7. gunsmith

    spring

    Do not relay on programs - set up Your own excel worksheets for spring calculation. All You need to know about springs is mentioned in Metallfedern (Meissner/Schorcht, Springer-Verlag 1997) ISBN 3-540-55892-6 (German text) There are 3 different K-Factors (Göhner, Wahl and Bergsträsser) given...
  8. gunsmith

    Which 3-D Cad Software is Best?

    I have tried Autocad with Mechanical Desktop, Inventor, ProE and SolidEdge and voted for the last. SolidEdge is very easy to use without reading the manual. Even complicated parts like pistol-receivers can be built up in a few hours. The tools You need are always in reach and you can concentrate...
  9. gunsmith

    Autocad Line Scale Setting - Centrelines

    I know that problem using Autocad a few years ago (we are using SOLID EDGE now). The only way to get rid of the point in a circle center is a lisp-macro which draws a pair of crossed lines (solid lines of the same width and color than the centerlines) on picking the circle. The marco is called...
  10. gunsmith

    Eliminating Recoil

    Only for the second part of Your questions: What kind of gun is it used for? A small arm or ...? What principle is used? Muzzle-break, Jet-chamber or ...? Give me some more information! Andreas Nehme mail@waffentechnik.com
  11. gunsmith

    Exporting SW files

    Try Transmagic from www.transmagic.com or 3D_Evolution from www.coretechnologie.de I tried Transmagic. It works fine for the standard formats like ACIS, PARASOLID etc. with the ability to repair the geometry. For the features of the construction try 3D_Evolution. They say, that they are able...
  12. gunsmith

    Is there a stable version of Windows?

    I have a THOSHIBA 3000-514 machine (1 GHz PIII, 512 MB Ram) with a Win 2000 Pro OS and a Solid Edge CAD-Program on it. It works perfect - CAD even on complicated 3d-parts like pistol-receivers etc. RAM (256 MB or higher) is most important on 3D-CAD. I had some trouble with Win XP (always...
  13. gunsmith

    Mcd to Pdf file conversion software

    Hi to all, pdfFactory from www.fineprint.com is an excellent tool. It is small and effective - installing nothing else than a printer which creates the pdf-files. Hyperlinks were recogniced and activated in the sheet. Good Luck Andreas
  14. gunsmith

    SAE 4140 thermal treatment

    I think we are tlaking 4140 (=42CrMo4) here with the material key number (German steel key) 1.7225 without additional sulphur content. 1.) You won´t reach 1531 N/mm^2 at any condition 2.) yield point or break point - what You are looking for 3.) mechanical property is also a function of...
  15. gunsmith

    How to calculate heat transfer from a solar energy?

    @ybjack We are talking about technical data here (Tables and so on). An English data-table is like a German - perhaps the units will be different. If there are problems to understand, You should download a free German-English (D->E) and English-German (E->D) wordbook (QuickDic 5.2) at...
  16. gunsmith

    Vacuum chamber heat transfer

    Hi Woody1, don´t look at the drum - the really problem is the nickel foil. Let´s have a look to the energy content of Lithium layer - at 600°C it is 2.03 J/mm foil when Li has specific heat of 3.58 kJ/(kg*K) and a density of 530 kg/m^3. The heat transfer coefficient of Ni is 89.99 W/(m*K), the...
  17. gunsmith

    specific heat of molten cast iron

    You are on the right way CoryPad. I found a table for class 40 gray iron at http://metalcasting.auburn.edu/data/Class_40_Iron/Class40Iron.html giving 912 J/(kg*K) for 1400°C. The table does not exeed to 1510°C we need here. But there won´t be a great difference to the number we are looking...
  18. gunsmith

    how to count the items in the drawings

    There is a way to do it. All parts have to be inserted as "block". A lisp-routing (I think it is under the support directory of ACAD) is able to count the "blocks" and write it to an ASCII-file which can be imported by EXCEL. If You add attributes to the blocks like price per...
  19. gunsmith

    How to measure wear resistance of sintered carbides for cutting tools

    I am not permanently involved in manufacturing processes but the thumb rule is soft carbide for hard material and hard carbide for soft materials. The coatings like TiAlN will cause longer lifetimes of the cutting tool but the tools should be deburred perfectly before coating. If not the coating...
  20. gunsmith

    How to calculate heat transfer from a solar energy?

    IRstuff is right the solar heat radiation at the ground is nearly 1000 W/m^2. For more information visit the German website http://www.solarkonstante.de/sonne getting a fine overwiew of the radiation spectrum of the sun and a top-50 solar-energy-link-site. Andreas

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