The structure of the tail boom is three-dimensional frame fabricated with thin CFRP pipes with small inner diameter. The body weight is two third of conventional one.
The rigidity is about ten times bigger in vertical direction and five to six times bigger in horizontal direction.
The torsinal rigidity is three times bigger. Consequently,
the steering response of elevator and ladder surpasses
the system soarer.

The structure of the cockpit is two-dimensional frame fabricated with square CFRP pipes. Square shape pipes made rigidity of the inside and the outside twice bigger than circle pipes, because steadiness in junction parts was improved. Styrene foam is divided into some parts and sticked on the fairing. The fairing is monocoque structure covered with GFRP.

Super high aspect ratio of main wings reduces Reynolds number because in the same area the chord of wings becomes short. Reduction of Reynolds number causes worse aeronautic performance. In a circuitous flight, there is an air-speed gradient between both edges of main wings. Similarly, there is a Reynolds number gradient. The level flight speed is kept 8 m/s for over 250,000 Reynolds number. The speed is tops in Japan, however required horsepower decreases. This particular problem has happened instead of that we can lose the weight of an aircraft for women unlike one for men. From this reason, optimizing the weight, the flight speed and Reynolds number is required in the design of an aircraft for women.

On an aircraft with a long span and fast flight speed, inertia moment becomes big and ladder response tends to be worse. We developed the above-mentioned tail booms and achieved high rigidity and well steering.