We were prompted to design and build an object that either flew or gave the appearence of flight. After a lot of brainstorming, we decided to make wearable wings that did not fly, but did extend and flap. After much consideration, we discarded the idea that they would extend, and instead decided to make them flap like actual bird's wings.
Our final design was a laser-cut wing made of thin wood that had leaf-like designs on it. The whole thing was made of wood, and it was not covered by a fabric of any sort. This design added aesthetic and reduced drag. It was slightly heavier, but that was not a problem as it did not need to acutally fly.
Our goal for this studio was to create a flying object,and our group decided to create a flying manta ray ,a flying object which has the appearance and the movement of a manta ray. We would like to make it fly in the sky with the motion of flapping just like what a real manta does. After a long time brainstorming and giving up of several schemes, we designed the structure of our manta and used two propellers to make it fly. However, the result of the scheme to use two propeller to support it did not work well, our manta could not fly since the center of gravity is too keep forward. As the result, we change the strategy of using heavy motor to provide it energy,instead, we decide to make a manta kite.
Our design is based off the idea that every girl wanted to be a princess with fairy wings sometime in their childhood. And with this project, we want to give them this experience. By making these wings that you can control as you like, it gives young girls the opportunity to enjoy their childhood to the fullest.
This project is quite simple. We've created a mechanism that is made of several wooden sticks conjoined at certain angles and positions that allows you to extend and contract the length of the wings at will. This contraption allows us to change the shape of the wings by only moving a singular piece.
1st Iteration: Cardboard linkage mechanism test:
Our first Iteration was made of cardboard, we just wanted to test out what were some possible positions for how we should place the cardboard pieces so that we could extend the wings and make sure it is flexible and operational. From the first draft; we notice that the wings cannot extend very well and always gets stuck. Therefore, we need the specific measurement of the length and the angles. Although we did not get into the right spot on our first try, the way that we put the sticks together gave us ideas to make it better.
1.5 Iteration: Thin Wood - improved rod shape (skeletal) Improved mechanism
After we figured out the specific measurement; we decided to use thin wood for testing if it’s going to work in when we use a harder material, such as t. During this time we got the numbers, harder wood sticks, and screws. We made it works a lot better, compare to the previous one. The wings can flap well and it is stable, but one things we still want a little bit is that the wings were lack of moving rotationally. In order to make the wings flap around ; we used 3D printer to print a ball joint so that it would move around.
2nd Iteration: Thick wood - wing tip shape, back panel + harness
We also tried using thick wood for making the sticks stable, because we thought maybe it would be stronger and easier to use. At first,we just made one part of the wings with the thick wood to support the other heavy wood, but it was hard to operate properly, because the joints were really firm and would not slide smoothly. We tried several different ways of working with the thick wood, including adding another piece to the structure. But that didn’t really help and we gave up attempting to use the thick wood to make our final design. Because of this, we decided to change the wood back to something that would be easy to move.
Diagrams/ Final Pictures
3rd/Final: Thin wood w/ improved back panel + foot cuff
In the end, we decided to that our original idea was the best. Due to the failure with the thick wood, thin wood looked as if it was the best material for us to use in the final design. After looking at our earlier iteration, we thought of what we could improve by changing the shape. We also changed the back panel, into a better one, that looks better, and allows the wings to perform better. We also created a foot cuff, so that we could attach the string to it and allow us to operate the extention of the wings with our feet. That ended up working really well, and we improved it to what it looks like today.
Our group is prompted to design a hover landing craft which can flow both on land and water. The hover landing craft was designed to suspend above the ground with the power of wind. We were expecting that the wind produced by the motor attached to the body would give it the power to move forward and hover landing. We put our ideas on the first sketch with one motor, one hole ( surrounding the motor ) and one body.
Originally, we made the first model using the hardboard. Different from the sketch, we added one more motor on the body, aimed to balance the force of rotation resulting from ONE motor. Two holes surrounding the motors run across the body so that the air flowing in from the front would be able to change direction to the bottom. With the wish of getting more force to lift the craft at high speed, we designed two wings on the sides. What’s more, taking the ideas from the airplane, we also put vertical stabilizer and horizontal stabilizer at the end of the body. In this way, the craft is able to change its direction vertically and horizontally with the help of servos. Then, as you see the picture, it’s exactly our hardboard hover landing craft (without motors attached).
Our second iteration was somehow similar to the hardboard model. More specifically, for a further step we designed the holes which are assumed to be the most important part. We attached the motor to the thin wood material joined at the front of the hole. At the very beginning, we believed that a cylinder hole would be much better, regarding to the cool appearance and its function of air flowing. Apart from this, a cylindrical hole with a curve to change the air flow direction would lead to less power loss, serving as a constant and steady power source. To make it more flexible, we gave up the former design of a single, closed hole. We were expecting to take almost everything into control, including the wind flow. So, the board is bound to the first choice. With the board rotating around the axis attached to the end of the hole, we are able to control the air flow direction. As you can see from the 3-D model on Rhinoceros, when the circle shaped board rotates to the horizontal direction, all of the wind flows directly backward. In such a case, the craft is able to get one hundred percent of power in the forward direction. Otherwise, when the board closes, rotating to the vertical direction, all of the wind is re-direction to the bottom, runs through two holes under the body and finally hits the ground. With the back force from the ground, the hover landing is created. We used glue to join the foam board. All of the parts were created on laser-cutter instead of 3-D printer, thinking that the 3-D printed material would be much heavier. However, after testing , we found that even the full power is not enough for hover landing when the board closes so we had to change the design.
We searched the Internet for precedents and started to conduct our third iteration. We hoped to add an air bag at the bottom to gather the wind. To make the wind in the bag flow out in different directions we used cardboard slices to distribute the air flow to the holes cut into the bag. Considering from a realistic point instead of an ideal perspective, we left the horizontal stabilizer, remaining the vertical one while the HIGH speed was NOT what we had expected…so sad. We did the test again and it do hover landing however, it couldn't move forward. When the flap is half open, the hovercraft cannot make enough lift to fly forward.
In the end, here comes our final iteration. To fully use the wind power, we dropped the former complicated design. To decrease the whole weight, we applied foam board to serve as the body. Two big circles are cut on the hot wire cut according to the size of the propeller. We used two motors, the one facing totally downward and the other facing backward at a small angle. Two propellers are rotating in an opposite direction to counteract the rotation force given by the rotating propeller. In this way, the craft is able to hover landing and move forward, at a very high speed. To change the direction, we attach a vertical stabilizer controlled by a servo at the center of the hoverboard. We use laser cutter to get the motor mounting plates from thick wood in order to attach the motors. All through the process of the project, we took the control of motors and servos with the program written on Arduino
On August 3rd we were told to create a unique flying object. It was difficult to come up with a unique flying object unlike anything that has been done before. Eventually, we decided to take inspiration from Eric's favourite sport; frisbee. We came up with the idea of a remote controlled frisbee that will be able to control the yaw, pitch and roll.
Our first iteration was a prototype made of cardboard. We began to discuss ideas, and work out how to build such a device. But soon enough, we realized that that it had started to become just another propeller powered ufo. Also, we had realized that it would only be able to control the height of the frisbee. As a group, we decided that it would not be a good idea to continue with our first iteration due to it being like any other drone or ufo.
Our second iteration was based off of the idea of being able to turn the frisbee mid air, instead of every direction, due to that idea being very difficult to make. We came up with several ideas, one of which was by using a flap, or a propeller to add drag or lift to one side of the frisbee while it was spinning. By using a digital compass, and an accelerometer, we discussed with one would be lighter, easier to make, and more likely to succeed. In the end, we agreed on the flap idea. After several different attempts in creating the frisbee, we finalized the design as you can see in last picture. Meanwhile, we also worked on wiring the electronics, and balancing the frisbee in a way that would allow for an equal weight on all sides of the frisbee. Therefore, it would be able to throw just like a frisbee.
One of the greatest problems that we faced while building our frisbee, was the programming. We struggled greatly with programming with arduino, since this new program was one that none of us have had much experience with. Although with great effort, and a lot of time, we were able to control the flap on the frisbee.
And on thursday, we were able to create a working model, and we flew it in the park in the afternoon. We were able to turn it just a bit and that was enough to tilt the frisbee. Although in theory we thought it would work quite well, but in reality, it just didn't work the way we wish it could have. As of now, only the shape of the frisbee really changed, we don't have enough time to change the code, or the equipment.
Our Final Product is a foam frisbee that has a a 3D printed rim that allows the frisbee to have a more aerodynamic flight when it is thrown. All the electronics are attached to the the bottom of the frisbee that prevents the electronics from breaking in case it has a crash landing. The flap is programmed to open at a specific angle when the frisbee is spinning so that there is drag on one side of the frisbee allowing for it to tilt over and turn.
As we may have mentioned before, our design prompt was that Eric likes frisbee and we thought that it would be fun if we could modify it ever so slightly. We began with the idea that we wanted to raise and lower the frisbee, as well as turn it. We realized that this idea was just turning the frisbee into a ufo, rather than a frisbee. So we started again and this time David gave us a digital compass to work with. After several discussions, whether to use a propeller or a flap to decrease lift on one side of the frisbee, we agreed on the flap idea. And as you can see in the gif, that was our final product