Fayme Chandonnet Quadcopter June 11th, 2018 - 19:36:56
If you want to move forward the back two motors spin faster and the front two motors spin slower. This tilts the aircraft forward and vectors the thrust in that direction. If you want to roll then the same principle applies but on the lateral sides. If you want to yaw then you must understand angular torque. A spinning object will produce torque proportional to the speed with which it is spinning. That is why on traditional helicopters you see a main rotor and a tail rotor. If the main rotor is spinning counter clockwise the entire aircraft will want to spin clockwise to conserve angular momentum. That is why the tail rotor is necessary it produces the necessary thrust to counteract the forces of the angular momentum.
Now then for the outer assembly - more safety is garnered by outer bearings but reduced friction is the key thus electromagnetic system makes sense but due to weight perhaps not 100% magnetic. This article explains the concept of Thrust Bearings and the combinations I propose we employ. "Design Fabrication and Performance of Foil Gas Thrust Bearings for Microturbomachinery Applications" by Brian Dykas Robert Bruckner Christopher DellaCorte Brian Edmonds and Joseph Prahl. (NASA/TM-2008-215062 January 2008; GT2008-50377). Currently we know that the quadcopter design is probably one of the most stable designs yet but most quadcopters are only toys small drones and have a limited payload. If we want these types of designs to fly around people heavy weight or become our future flying cars and air taxis commuter shuttles well need near 100% safety that means current rotorcraft components may not be viable. Please think about the future maybe you can have a flying car after all?
If you are thinking about getting into the RC hobby then you have most likely seen the quadcopter craze that has swept the world. These little unmanned aerial vehicles are very fun to fly you can hover you can go backwards you can go straight up or down. All things that you cant really do in an RC plane. But it is also a little bit more difficult to learn to fly (I think). The reason for this is because of orientation. With a plane it is much more clear which way is forward and to maintain lift you are always going forward. However with a quadcopter or any multirotor it is much more difficult to maintain orientation because you have a symmetric frame. If it is a quadcopter you have 4 motors in an X formation and you can choose which way is forward by how you mount the flight control board. But once you get up in the air you have to remember which way is forward and maintain that orientation through all the maneuvers. I have found that a good way to help maintain orientation is by making the propellers in the front a different color from the propellers in the back. For example on mine the front two are bright orange and the black two are blue. This way when flying I am able to tell which way is forward. But even then if I get a little ways away it can be hard to see the props so some people will add a light weight canopy or a bright ball to indicate forward direction.
It is good to make sure that the option they settle for is sturdy in design to serve longer and survive falls and crashes. It should support flying techniques that are advanced. It should offer simplicity in flying and have an instruction manual that is easy to understand. There should be enough proof of high picture video quality. It has to be light in weight multifunctional improved with visible upgrades from previous brand models. Before settling for a quad copter and finally choosing what the best is one must take time to go through previous reviews in known sites that are trusted such as Amazon. There are always many user reviews both positive and negative that can give one a clear scope of what they are looking for and where they can find it. Based on such honest judgment from unknown people its always easier to decide. There are many websites offering free information on quadcopters. There must be thorough researching beforehand. Quality isnt to be compromised. There are known companies that provide top notch quadcopters and have steadily upgraded their models. The DJI Phantom GoPro quadcopter is one such quality product that is currently ranking really high and has received a lot of satisfied approval.