Questions tagged [helicopter]

A helicopter is a type of rotorcraft in which lift and thrust are supplied by rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward, and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft would usually not be able to take off or land.

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2answers
164 views

Was flying a helicopter below building height against FAA regulations? [duplicate]

I'm referring to this incident: https://twitter.com/Dacheslow/status/1267638389421072384 Some people were saying it was illegal under FAA rules to fly that low and close to a crowd, and also to use a ...
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Buy an aircraft to train first or after? [duplicate]

I'm thinking about learning to fly. Is it worth buying an R22/S300 or C172/Cherokee to train in then fly afterwards?
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1answer
202 views

How significant is the static buildup on the blades of the main rotor? And some questions related to this [duplicate]

1) Usually, a static charge is built on the helicopter when it flies through the air. If a person touches the helicopter before it touches the ground can that person get electrocuted because of the ...
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Jet Engine Cooling, HTC and cooling calculations

Right now I am working on a project about cooling systems in jet engines. And I don't have a supervisor to ask anything. I would like to know what is the most useful resource (book, analsys programs ...
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1answer
183 views

What do I need to get my pilot license? [closed]

I am thinking of getting my pilot license, I would love to fly a helicopter or a small plane, but I don't know where to start. What do I need to get a pilot's license? Things like: How much does it ...
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In an articulated hub rotor craft, what could cause the blade to flap negatively?

For example in forward flight what could cause the blade to flap lower than parallel to the CF at the front of the aircraft ?
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3answers
727 views

Why the pitch control of helicopter is named Collective Control? And why does it located at the left side of the pilot seat?

This is probably a very trivial for some of you. But sometimes a name not representing the function become a question, just like this Collective Control, which its function is to pitch up the blade ...
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3answers
439 views

Can a Stewart Platform be used instead of a swash-plate assembly in a helicopter? What are the pros and cons? [closed]

https://en.wikipedia.org/wiki/Stewart_platform Also, are there any helicopters in service that use this mechanism? I was thinking along the lines of using it instead of the part of the swashplate ...
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1answer
211 views

Why do electric versions of helicopters need four rotors, or: why are they quad copters? [closed]

Why do electric versions of helicopters need four rotors, or: why are they quad copters? Could it be that their motor do not have enough torque? Then again electric motors have much more torque ...
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1answer
157 views

Could helicopters use a rear wing to get more lift from the rotor vortex?

Could a wing be added to the rear of a helicopter to catch the vortex from a helicopter for more lift? How would that affect transitional lift while in forward flight? Source: https://www.danubewings....
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Black aircraft at night no lights with helicopter following - is this a stealth aircraft? [closed]

I have just seen a dark long aircraft fly over my car followed by a long helicopter. I am not an expert at this but it is 8pm, i am on a hill with a few houses, there is a little street light on the ...
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937 views

What is the lift to empty weight ratio of some popular modern helicopters?

What is the lift to empty weight ratio of some popular modern helicopters?
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Did NASA just broke the world record for fastest aircraft by going over 10 times faster than the previous record?

The current world record is held by the Lockheed SR-71 Blackbird. In 1976, this aircraft reached a top speed of 3,529.6 km/h, according to Wikipedia. Fast forward 44 years, and NASA just launched the ...
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1answer
982 views

What was this helicopter doing? [closed]

I recently saw a helicopter with the registration "N61NR" flying repetitive patterns back and forth over my house and from my observations, it appears that it was landing in a grass field near a ...
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2answers
208 views

Why are there no emergency flight rules in place to prevent IFR-certified helicopters, operating under special VFR, crashing in low visibility (IMC)? [closed]

In modern times, engineering allows humans to do everything: Drive in fast cars or trains, diving into the deep sea, and even going to space. Which is a great thing indeed. But when it comes to ...
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1answer
99 views

How do you orientate the helicopter at night? [closed]

How do you orientate the helicopter at night?
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1answer
2k views

How do the propeller blades accelerate air resulting in thrust to push an aircraft forward? [duplicate]

I do know that the blades on a propeller generate lift to provide a force pushing back on the air based on newton's law the 2nd. What I am having trouble understanding is how the blades generate ...

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