Hello,

I thank you for sparing time to my studies. Most of us are always aspired by the gulls by observing how they float in the air at seashore, how they manoeuver skillfully, how they play each other in the air. Then why mankind didn’t develop an individual vehicle for flying although in 21st century they could reach the moon and other planets, with the help of many composite materials they could increase the resistance of materials to a great extent by decreasing their unit weight, and they could decrease the weight/power ratio to 0.50-0,80 Kg/HP in piston engines.

As a result of my studies that began with an amateur interest, altough simple, I had knowledge about the flying principles of airplanes and helicopters and also about their power calculations to some extent. However the design of the airplanes with wings was not appropriate for my purpose. In helicopters, on the other hand, beside many mechanical confusions, it was necessary to extend their wing length in order to increase their lifting capacity, which brings about some aerodynamical problems. In the case that the wing lengths were selected as shorter, again some aerodynamical problems occured and the amount of power needed to lift the unit load was increased.

My objective, on the other hand, was to develop a design which is quite light and the load/lifting capacity ratio of which is low, by benefiting from the current technological developments. During this process, something caught my attention: the propellers used for the ships at the beginning were almost the same originally however one od its developed model was used for the first airplanes to fly, and again in the following years, a kind of water-jet looking like the ones used as power units especially of catamaran ships (same in principle) was started to be used also in the airplanes. Based on these examples, with the courage that the system which looks like my project in principle is used in ships I have carried out the study below,

Based on the formula, the lift in my design would be less by approximately 1/3 as compared to the aircraft wings, but would be more by 1/3 as compared to the lift capacity of the helicopter wings (meaning an increase of about 100% compared to the lift capacity of a helicopter). When all these formulae were considered based on the case of carrying only a single person, it would be sufficient for the system to have a capacity to carry a load of 150 kg including the pilot. If this system had worked, it could have been possible to form the mechanical parts of the system at a weight of around 50-60 kg through the use of the composite materials.

I began the tests with the prototype, the photos of which I have presented, and many revisions have been made to enable the system to operate. The formed prototype weighed approximately 60-70 kg, wherein the contact of the prototype with the ground would be provided by means of the rotating wheels and the extent of load it was able to lift would be measured when the system operated. According to this prototype thus arranged, the wing chord length was taken to be 6,5 cm, the wing length was taken to be 30 cm and the diameter of the circle passing through the wing moment centers was taken to be 57 cm and the system was expected to lift a load of 35-40 kg at a revolutionary speed of 1500 rpm. The wing angles in the system were set to be maximum 12˚ (α=12˚). The number of revolutions of the system was increased stepwise with a converter-controlled electric motor. The system was detected and identified to lift a load of 32 kg when the value of 1100 revolutions per minute was reached. Due to the fracture in an intermediate arm, which guided the wings, during the increase of the number of revolutions after this stage, it became necessary to break off the study. As I could not adjust the balance of the system in a robust manner in this prototype study, the system was already operating with partial oscillations and vibrations.

Upon the aerodynamic analyses and stability considerations undertaken after the studies, my belief that it could be possible to accomplish a result has considerably increased. If we provide such lifting efficiency, then the today’s technology, which has already resolved the aerodynamic issues for many air vehicles, could provide a solution to the aerodynamic problems of this system too. I am of the opinion that the system/vehicle, which could be designed with a rather light and stable structure by the use of the composite and reinforced materials, could be brought into use by the mankind.

As a result, it could be possible to obtain greater lift by further increasing the wing angle, which was given the maximum value of 12 degrees in the prototype, and at the same time, it could be possible to ensure the system stability via the currently known technological methods and to envisage and utilize the personal system layouts with very low weight, which would enable a person to fly as if they were a part of that person as in the case of an accessory or prosthesis and which would really resemble the one in the animation. Yes, it could definitely be possible. I believe this would only take a process that is based upon the belief, budget and effort.

I would like to thank you very much for sparing time for my studies.

ÖZER ÇAKIR