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Recent content by mohr

  1. mohr

    RAF-6 Aerodynamics data

    Hi spar web: Tanks for your reply. The reason for this data requirement was because I made a computer. program based on the ARC-R&M 1674 for the aerodynamic characteristics calculation of propellers blades and I wish to validate the results i.e. using the naca tr-378 specific for two-blade...
  2. mohr

    RAF-6 Aerodynamics data

    Hi... I'm looking for aerodynamic data of the old RAF-6 airfoil, used in the propeller blade sections. The only information source I have are the Naca TR-319 and TR-207. Does anyone have knowledge of any more modern source of information to obtain data for different relative thicknesses? The...
  3. mohr

    Using a turbulence model in a numerical wake modeling technique

    From NREL (NATIONAL RENEWABLE ENERGY LABORATORY) Wind Turbine Modeling for Computational Fluid Dynamics December 2010 — December 2012 L.A. Martinez Tossas and S. Leonardi University of Puerto Rico Mayaguez, Puerto Rico NREL Technical Monitor: Pat Moriarty It may help you. Cheers
  4. mohr

    effect of ribs position on aerodynamic behavior

    Hi...the canning probably affects the structural stability and rigidity....allowing more deformation, and the elastic deformation is not a good friend of aeroelasticity phenomenon. Cheers
  5. mohr

    Vertical Speed?

    Hi Berkshire... My explain was intended to be easy to understand. You are right about gliders. The variometer on gliders is a Total Energy Variometer type in order to read the real rate of ascending on thermals. Best regards
  6. mohr

    Vertical Speed?

    To measure the airplane descent or climb velocity. I.E...if you are flying by instrument approach such as VOR LOC, you must fly the plane from one point to another with a specific descent vertical speed until reach the point at required altitude and distance specified in instrument approach...
  7. mohr

    Converging Nozzle Ideal Ratios

    Hi Tripsahoi : A0/A1 may be 1.2 / 1.3 (with gamma 1.4) and watching the back pressure to avoid Mach chocking as GregLocock said. Cheers
  8. mohr

    Perching Glider

    Hi rds1g13 : Entering recently this forum (long time absent) I found your question. Read about airfoil POST STALL phenomenon...this occurs more frequently on HAWT (Horizontal Axis Wind Turbines). But you will pay a price of a tremendous rises in airfoil CD beyond "normal" AoA... Try with...
  9. mohr

    Rotor shaking

    <hi goldcountry : Chadwick for blade trak & balance....or Chadwick / Honeywell systems. Cheers
  10. mohr

    Technical Paper

    Hi Anthoni 71 : "Unfortunately the paper "Matrix Analysis of Fuselage Structures", Bristol Aircraft Ltd, is not present in Library." you said. Try to find the book " Modern Fuselage Analisis , J.H.Agyris,Sydney Kelsey " it may help you in your yob ( Many,Many years ago I read the book )...
  11. mohr

    Slow graphics movement

    Hi: If you are installing a new G.Card (ATI Firepro)You have to disabled the integrated graphics on the motherboard setup. This may result in an system incompatibility in your machine. Also check if the drivers of the ATI Firepro are are the last version and properly installed. Cheers
  12. mohr

    crash when trying to print?

    When you want to print any drawing the window of printer control appears (i.e HP 2510 series or whatever)? With configuration option button in manual mode should appear on the printer / plotter box the identification of your printer properties and usb port connection in use. If these data do...
  13. mohr

    Troubles with dimension text

    Hi: In order to take advantage of the full width of a printer for plotting drawings I turn 90 degrees to positioning vertically (i.e. A3 and A2 together in vertical position). Some dimension texts reverse their position. Someone please could help me to avoid this unwanted effect? Best Regards...
  14. mohr

    Blade Element Momentum Theory

    Hi bd411: My reply and suggestion may be late....try with WIND ENERGY HANDBOOK, Burton,Sharpe,Jenkins,Bossanyi...it is a very complete book. Cheers
  15. mohr

    Weissinger's Method

    Hinitish93... NACA TR-921 is a bit hard to read under mathematical point of view. Here the Weissinger L influence coefficients singularities was explained unclear (pag. 14 aft A7 equation). An application of Weissinger L method can be found on NACA TR-1228 on computing procedure for L functions...
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