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Recent content by 1917Alby

  1. 1917Alby

    centre of preasure/lift for bi-plane wings

    jqcf1 Negative NZ as shown in my greeting
  2. 1917Alby

    centre of preasure/lift for bi-plane wings

    Hi RB1957 Thanks for your suggestions. As I want to recalculate the static margin I need to establish the centre of lift as a start. Thanks again
  3. 1917Alby

    centre of preasure/lift for bi-plane wings

    Just to give the complete Diehl reference details "Relative Loading on Biplane Wings" "Relative Loading on Biplane Wings of Uneaqual Chords" Diehl, Walter S., NACA Report 458 & 501 Both NACA reports can be found at http://NTRS.NASA.gov/search.jsp.
  4. 1917Alby

    centre of preasure/lift for bi-plane wings

    Sorry to mess you about but further correction to stagger now 19 degrees after more accurate measuring of aircraft already rigged, and redrawing to scale. Thank you all for you for your further notes, I had looked to some of these sites but the formula are far beyond my capabilities. I have...
  5. 1917Alby

    centre of preasure/lift for bi-plane wings

    Correction. It is STAGGER that is 15 deg. Wings are parallel of equal span. Thanks
  6. 1917Alby

    centre of preasure/lift for bi-plane wings

    Hi from NZ.Could some kind knowledgeable member calculate for me where the centre of lift should be for unequal cords on a bi-plane. Measurements: Top wing span 7100 cord 1230 millimeters, Bottom 6600 x770 not including fuse. Gap 1140. Stagger 525 measured at leading edges. MAC 15 degrees at...
  7. 1917Alby

    PLASTIC COVERING ON 2024T3 SHEET

    Can the plastic coating sheet alloy be left on the inside of a leading edge? My thoughts are that it is not correct to destroy the aluminuium coating by scuffing it before treating it with alodine. Alby
  8. 1917Alby

    spinner backplate

    Hello from NZ I am constructing a 1917 German Albatros DIII 3/4 size replica,hopefully under 1200 lbs all up. I am at a loss to know the thickness of a backplate to carry the spinner. The spinner has been constructed of fibreglass 1/16 thick reinforced to 3/32 at outer edge, is 24"dia. 12" deep...
  9. 1917Alby

    biplane wing CP

    Hello from NZ. I am designing and building a 1917 Albatros DVa 3/4 scale replica and need to know how to find the centre of preasure of the wings. The top wing has 18ft 5'' lifting span and 42 inch cord. Bottom wing 20ft X 27inch cord,gap 48inches, stagger to be 30 degrees I am not formula...
  10. 1917Alby

    aircraft

    How do I layout the components of a biplane in their proportions 1917 alby

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