This tool takes a list of relative forces along a span (unit-less load distribution), and finds a smaller set of absolute forces to simulate that distribution. The goal is to determine the geometry of a whipple-tree or find locations to place weights for a load test.

It may also be useful to find a good location for a wing strut, or calculate the torque at a specific span location.



The input load distribution consists of a list of numbers separated by white space (eg. space, tab or newline). The first entry in the list is the load at the wing root, then progressing toward the wing tip. These numbers can be real-world units but do not need to be. Distributions with both positive and negative values (eg. high twist wings at zero lift angle) are not supported.

Desired load distribution
16.661639 16.631629 16.570796 16.5015 16.407382 16.323118 16.222729 16.179678 16.099531 16.038286 15.983139 15.925627 15.849621 15.7969 15.759977 15.653011 15.647219 15.619788 15.517883 15.482964 15.372189 15.266224 15.210352 15.12375 15.017896 14.921223 14.819727 14.695768 14.573897 14.461116 14.341623 14.221504 14.089613 13.961188 13.822885 13.685213 13.532167 13.385685 13.229231 13.075881 12.906891 12.745503 12.574677 12.405923 12.218298 12.03902 11.852997 11.671377 11.470518 11.2813 11.074742 10.869712 10.641308 10.433008 10.20491 9.972902 9.714053 9.476749 9.2132 8.953135 8.671745 8.386444 8.056534 7.731604 7.370623 6.99866 6.57601 6.089262 5.533574 4.847675 3.985589 2.740591



In order to calculate real-world units of force for loading, the weight to be supported by this single wing must be provided. For a typical plane, this will be half the total weight of the aircraft.

To calculate real-world positions, the span of this single wing must be provided. This is the span across which load will be applied.

Weight: (units are only used for display in the results below)
Span:
G load:

Sandbag weight:
Sandbag width:
Center clearance: (Portion of span at wing root where bags cannot be placed, eg. on a high-wing plane. Uusually half fuselage width)




Whipple levels: