Botmite 1 has thin high performance wings ready for fast flight. Calculations show, however, this first sleek (Eppler - 374) 8 foot wingspan, 510 square inch area wing requires a different (read larger and stronger) airfoil and wing for long distance and heavy flight. The point is to provide a wider speed envelope while maintaining a low drag and power efficient wing.
So, Botmite 1A is a redesign of the initial set of wings. After testing the new wings will be shown here. The 1A wing consists of a higher lift airfoil, a 10 inch root chord and a 10 foot wingspan with approximately triple the plan area of the original wing. To keep it simple, this wing has a hershey bar or rectangle shape geometry. Further, this wing should not require struts and can function fully in 10g aerobatic flying.
A shorter Botmite 1.1 six foot wingspan yet wider twelve inch chord in a rectangle planform is desiged to fly in a flight envelope from human powered bicycle speeds to the 100 mph plus area further providing an introductory 20 g force dynamic range of mobility. Wingspan for this version presently stands in the 6 foot length, aspect ratio 6. While the rectangle wing geometry and chord ratios are not optimum, it presents a useful and practical testing platform for further study. Successful airfoils for this experimentation include Clark-Y and E-205. So while tail geometry and wing area ratios (typically range from .09 to .2 of the wing area) for proven designs, this approach does not consider expanding dynamic range beyond human endurance.
As a result, the botmite 1.1 version aircraft turn helix now targeted begins at 720 degrees per second at top speed. To attain this goal, testing of lightweight carbon fiber mixed with various cores (balsa, birch, foams and flexible structures) to form a lightweight composite sandwich to improve airfoil resilient qualities and then to incorporate this into a new design. Further enhancements include increasing tensile skin strength materials and structural design epoxy fused to core structures which serve to limit wing flex. Boundary layer airfoil drag enhancements are being considered and evaluated along with control surfaces and mechanisms.
Botmite 1.1 New Wings
One pound foam core, Clark-Y and E-205, initiate the testing program to enhance the performance of Botmite.