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TShock
- 12
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why do helicopters need a stabilizer rotor but airplanes that use propellers don't?
Depends on the airplane. In a P57, if a pilot made the mistake of going full throttle on takeoff, it could lead to a crash; takeoff speeds are slow and the ailerons need a lot of throw to counter the torque from the prop, and just after the plane leaves the ground, the landing gear no longer supply a counter torque force, so suddenly it's up to the airlerons. Plus a lot of aileron throw can create adverse yaw, so then rudder inputs are required to compensate for that.TShock said:why do helicopters need a stabilizer rotor but airplanes that use propellers don't?
That was invented long before the helicopter: it's called a balloon.ManDay said:Why can we not invent something, which doesn't waste 100% of its power for a process which actually requires none, yet?
russ_watters said:That was invented long before the helicopter: it's called a balloon.
Radio control helicopters can also push air upwards. In aerobatic mode the blades mostly rotate at constant speed, and the overall pitch (collective) can be changed from + 10 to +13 degrees to - 10 to -13 degrees depending on the power of the radio control helicopter. The high thrust to weight ratios (around 8 to 1 or so) allows these models to do impressive stunts. The model has separate throttle and pitch control, but these are combined into a single programmable control on the transmitter, to maintain near constant rpm of the main rotor in aerobatic mode. In addition, the tail rotor control is also mixed into prevent yaw reaction to pitch command inputs from the transmitter, but the tail rotor also has it's own control to allow the pilot to control the yaw axis.pchalla90 said:Helicopters work because they push air downwards fast enough to propel the helicopter upward.
No, too much momentum, instead the pitch angle is changed as described above.Can the pilot change the direction the blades are spinning?
The main difference between helicopters and airplanes is their method of lift. Airplanes use wings to generate lift, while helicopters use rotors.
In general, airplanes are faster than helicopters. The average speed of a helicopter is around 160 miles per hour, while the average speed of an airplane is around 500 miles per hour.
Helicopters have more maneuverability than airplanes due to their ability to hover and fly vertically. Airplanes rely on their wings and rudder for maneuvering.
Most airplanes use jet fuel, while helicopters can use a variety of fuels such as gasoline, diesel, or jet fuel.
It depends on the task at hand. Helicopters are more versatile for tasks that require hovering or vertical takeoff and landing, while airplanes are more versatile for long-distance travel and high-speed transportation.