That's a difficult question to answer. First, in the sense that a propeller is really an airfoil, it does, in fact, generate lift. However, the concept of lift with respect to aircraft, generally refers to the vertical lifting force, and this is produced by the airfoils (wings) and not the propeller. The propeller produces forward thrust which, when sufficient, generates the speed necessary for the wings to produce lift. So, back to the question: A propeller needs to turn fast enough to produce enough forward speed for the airfoils to produce sufficient lift for the aircraft to rise. The RPM necessary to do this depends on the size and number of blades, the power of the engine, the weight of the aircraft, and a number of other factors such as airport elevation, etc. Sorry this doesn't exactly answer the question, but hopefully it will help you craft a more specific question that can be answered more accurately.
Slow if it is a large propeller, faster for a smaller one.
spin rate depends on the RPM of the entire device turning it. If both are turning at the same RPM, they both spin the same speed.
14 mph
A rubber band boat works much like a rubber band airplane. First you need to build the boat itself. Then you need to make a propeller. The propeller shaft needs to run through the inside of the boat, not below the boat. With the prop below the water. The propeller shaft should not go the full length of the boat. About halfway through put a loop in the shaft. Then to the front of the boat attach a rubber band. Then run the rubber band through the loop in propeller shaft. Now twist the prop and the rubber band should twist around and around. When it's good and tight let go and the propeller should spin. Allowing the boat to move forward in the water. Mind you the shaft needs to be a thin piece of metal, as it will be difficult to make it water tight.
A spinning electromagnet does not produce power without other components that you need to specify.
It can spin either way.The way in which it spins determines the direction it pulls the object it is attached to.if it the propeller spins clockwise it pushes air backwards causing forward thrust, and if the propeller spins anti-clockwise it pushes air forward creating reverse thrust..additional The above applies to an individual prop. However, for example, Spitfire aeroplanes were made with both clockwise and counterclockwise rotating props.Which is by and large OK, but just as you leave the ground, the prop exerts some torque on the plane body, and this is countered by the application of other control surfaces. Such as flaps and rudder.But before you apply the corrective measure, you better be sure you are doing it the right way. This problem has caused accidents.
12 km per hour
yes, but not too powerful, or the plane will spin with the propeller
The two rotors spin in opposite directions.
There is no such bowling style as 'fast in spin' or 'fast out spin in'.
The rotor is like the engine to the propeller. A propeller is the fan like blades on the top that spin to make the helicopter fly.
Because all they need is their main rudder to spin fast enough to get the helicopter off the ground. They need only enough room to spin the rudder and for the helicopter to fit in a space. They don't need to go forward fast to lift off, unlike planes and shuttles.
A propeller is connected to a drive shaft which is connected to an engine that runs the same way as a car
The basics of gymnastics is pretty simple. To lift yourself off the ground, spin, and do that wacky stuff.
Just thinking about all of my homework makes my head spin. The boat's propeller will not spin.
Helicopter blades operate from a transmission or gearbox immediately under the blades. They have to spin fast to give the helicopter lift. Once they are in the air the blades twist slightly to give forward motion.
It depends on the medium that the propeller is in . Aircraft propellors are very fast ; several hundred revolutions per minute. Ship's propellors are much slower ; up to one hundred revolutions per minute.
the engines make the propeller spin and will make it fly