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  1. A

    U/L airfoil selection

    I need an airfoil with the high C.L. @ R#s 1-2 million, very low pitching moments of the 5 digit airfoils, w/o the sharp stall. The only 5 digit airfoil with a mild stall is the 62021, but it is too thick [high drag], 15 % would be fine. Is there a newer than 80+ year old airfoils that has...
  2. A

    tube straightening

    I have an engine mount [chro-mo] for a 1/2 VW -2 tubes are bent about 45 degrees. I would like to straighten it with heat to use as a test stand. Feasible?
  3. A

    NIKASIL CYLINDERS ON A VW ENGINE

    I HAVE A NEW SET - ARE THEY OK?, WILL THEY LAST?, HAVE A GOOD HISTORY OF RELIABILITY? ANY PRECAUTIONS?
  4. A

    VW LIQUID COOLED

    LOOKING FOR INFO ON LIQUID COOLING THE HEADS OF A TYPE I VW [AIR COOLED] ENGINE. GREAT PLANES HAD ONE FOR A SHORT PERIOD OF TIME, BUT Steve Bennet said the engineer/designer wouldn't take the time to refine it.
  5. A

    thickening a 6-series airfoil

    Can a 6-sries airfoil be thickened by increasing @ co-ordinate by the % change in thickness? IE: 21% to a 24% is a 14.28% increase in thickness, so will multipling @ Y co-ordinate by .1428 yield an accurately thicker foil, or will the form be lost? [NOTE: the UIUI site doesn't list the...
  6. A

    Sonex titanium leg

    I want to r&r the 1.125"x25.5" 4lbs each, solid titanium main tri-gear legs with carbon fiber wraped alumium, solid rod or tubular carbon, to save lbs. gross weight is 1100lbs. I'm not an engineer. Help?
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