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Helicopter Lift Speed
Transcript of Helicopter Lift Speed
Helicopter Lift Speed
design by Dóri Sirály for Prezi
Helicopters are very captivating to watch. The spinning of the rotor blades on top of the helicopter generate lift, allowing it to take off vertically. A helicopter can move in 6 different directions, they can land vertically, too, allowing them to set down in small spaces, such as hospital helipads or on a ship at sea. We flew a remote-controlled helicopter and measured how the rate of the rotor's rotation changes as the helicopter hovers and flies up or down. The purpose of this experiment is basically to prove that the speed of a toy size helicopter in fact does affect the speed of the lift and descent. Based on our results our hypothesis was proven correct, and it was found out that the speed of the rotor does affect the speed of lift and the speed of descent. There were some limitations, which affected the results of the experiment, but overall the experiment was done successfully.
If weight is put on this helicopter and the rotor speeds up, then the rpm of the rotor blades will be much faster and therefore lift quicker. Because all wings create lift by producing lower air pressure on the top of the wing than on the bottom in effect, there is a vacuum created above the wing sucking it upwards.
Doing this experiment is really fascinating to do because watching real helicopters fly around without wings like an airplane does but with a helicopter huge propeller sits on top which keeps the aircraft off the ground. When conducting our results it was difficult to do and had to be done over and over being sometime the helicopter wouldn't stay in one place, the battery only lasted 10 minutes, and one touch to the helicopter and it could crash to the ground but we got our results. After viewing our results we could see that our hypothesis was proven in numbers that not only the propellers move faster but the helicopter moved fast to compensate for the extra weight.
Assemble your remote-controlled helicopter.
Practice flying the helicopter so that you can make it hover, move vertically up, and move vertically down.
Place the helicopter on the ground in a flat spot.
Place the tape measure near the helicopter.
Pull the tape out to 3 or above meters.
Lock the tape measure open.
Bring the helicopter to a hovering position at about 0.5 m above the ground.
With the helicopter hovering about 0.5 m off of the ground, have a partner record the rate of rotation, using the digital tachometer, in your lab notebook.
According to RC Helisite (2011) RC helicopters are very advanced and complicated machines and forms of transportation. It is explained this way, a train goes forwards and backwards, a car goes forwards, backwards, left and right, and airplane goes up, down, forwards, backwards, left and right. But a helicopter can travel in 6 different directions, up down, forwards, backwards, left, right, but the helicopter can also do a 360 degrees. In a life size helicopter the pilot is able to see forwards, controlling the cyclic with one hand and the collective with the other hand. Some professional pilots actually say that driving an RC is more difficult than a real helicopter. The reason behind the RC being so difficult to drive and control is because there is no pilot inside, and you're not always seeing which direction exactly the RC is moving in which makes the orientation and control very difficult.
The form in which an RC helicopter flies is broken into 5 basic components, main rotor, tail rotor, swashplate assembly, collective control and cyclic control. The main rotor, A conventional RC helicopter has its main rotor above its body which consists of 2 or more rotor blades extending out from a central rotor head. The main rotor of an RC helicopter is what produces the lifting force that allows the RC helicopter to fly. The rotors on a collective pitch RC helicopter are shaped just like the airfoils of an airplane wing, only they are thinner, narrower and both sides are symmetrical.As the blades of the rotor rotate through the air, they generate lift. The amount of lift generated is determined by the pitch angle, and even speed, of each blade as it moves through the air. Pitch angle is referred to as the angle of attack when the rotors are in motion (How do RC Helicopters Work?, 2011, para 8,9)
Limitation 2: The distance caused for us to not be able to meet up, and it made it hard to do the experiment together.
Limitation 3: We did not video tape the experiment taking place, so the only source of evidence are the results