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  1. rapidshot

    Wing skin deformations

    When designing the skin metal plates of a light aircraft under pressure we get relatively high deformations, apart from aerodynamic considerations and shear buckling due to shear flow can we just use one of the design philosophy approximations to reduce deflections and avoid narrow rib spacing...
  2. rapidshot

    Simplified chord-wise pressure distribution

    Hi All, I saw this approach in Denis Howe’s “Aircraft Loading and Structural Layout”, i think it is very convenient for computerized calculations,
  3. rapidshot

    Shear flow in wing box and single strut

    Hi all, I have been thinking on the subject for a while but couldn’t make an approach for hand calculations, Any recommendations are welcome, how does a single strut attached to front spar affect the shear flow in the box due to torsion, Do you think that shifting the elastic axis linearly...
  4. rapidshot

    Two of my excel files which you may find useful,

    Hi all, File: Aircraft Performance, limited with rectangular wings and 2 bladed props, no taper at all, contains Basic aerodynamics , Static thrust, In flight thrust Tail preliminary sizing Takeoff ground roll Rate of climb Range Neutral point, power effect is not considered because it shifts...
  5. rapidshot

    Attitude indicator , need help

    I am looking for an AI which should fit in my Stearman's rear seat panel, regular ones are long , can anyone recommend a brand and/or a shop for an AI which is shorter, Thank you
  6. rapidshot

    Excel file, Performance, Longitudinal Stability, prop curves

    Hi, If not against site policy i want to share an excel file i prepared couple of years ago, (No macros), if this is considered as a violation of the community rules pls delete this thread, https://www.dropbox.com/s/4h19f9l08zw7500/experimental.xlsx?dl=0 1st Sheet: Power rqd curves, stability...
  7. rapidshot

    Schrenk's basic lift distribution,

    Hi, I really wonder where does the 1/2 factor come from in the basic lift distribution expression, dA/dx= Additional lift + 1/2 * q * lift curve slope * delta twist angle * chord Thank you
  8. rapidshot

    Shear Center, single spar, torsionally stiff box, a design philosopy question

    Hi, Think of a single spar wing where this spar is located at almost AC, 25% of the MAC, Your assumption is, the skin takes no stresses from bending of the wing but only resist pressure bending and torsional shear stresses , Now, when its time to check the torsional divergence, should you...
  9. rapidshot

    Questions from material specs to skin thickness

    Hi, New here and this is going to be my first message, by the way English is not my native language, so from time to time it may sound weird, sorry for that, Half retired structural engineer designed tall and/or wide steel structures all life long, basically aeronautical engineer, amateur...
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