Delta

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 Flattened ring-wing (coleopter) in „delta” arrangement - experimental aircraft

The presented airplane arrangement combines features of an oblate coleopter with a “delta” wing. The oblate coleopter, together with the built-in propellers, enables the reduction of induced resistance. The “delta” type plane provides for arrangement integration. A characteristic feature of this arrangement lies in the fact that all the elements of the airframe, every fragment of its surface, participate in generating aerodynamic lift. The integrity of the arrangement and the large volume of the lower plane space enables a favorable placement of the crew, engine and all the remaining equipment. In the presented example an arrangement has been dimensioned to enable the creation of an experimental, one-person “microplane”. The purpose of executing this design is to study an extremely atypical aerodynamic arrangement in practice. Later in the description an unconventional control system has been presented — one that takes advantage of the characteristics of the arrangement to the largest extent possible.



Control system
The controls are comprised of four moving segments placed on arched fragments connecting the lower and upper plane,
and a “trimmer” constituting a fragment of the rear part of the upper plane’s straight section.  Displacement of the “trimmer” provides airplane balancing in the set flight conditions. The correlated deflection of individual moving segments provides control around all the spatial axes.  The placement of these segments near the propeller streams enhances maneuvering dynamics.
In the demonstrated example deflecting the “lower right” and “upper left” segments will cause the airplane to bank to the left.

„
Screenplane” „DELTA” in the form of a flattened ring-wing (coleopter)
General view – basic dimensions
- The "Delta" system, in the proposed version, is exceptionally predestined for use in "screenplane". This is due to the large size of the aerodynamic chord of the lower wing - it significantly improves the aerodynamic properties when approaching the ground (land surface or water surface).

-What is very important, the proposed aerodynamic system is effective both as a "screenplane" and as
a classic aircraft
- it allows to move quickly at higher altitudes.

The presented concept has been submitted to the Patent Office of the Republic of Poland (Application no. Wp.31493 dated March 21, 2023)























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Copyright by Marek FoltyƄski 2023