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0 votes
3 answers
503 views

Would Aeroplanes or Helicopters work on our Moon?

Would Aeroplanes or Helicopters work on our Moon? In general , I think , in Aeroplane Case: (1) Air is required for Aeroplanes to float : Would Moon have enough air? (2) High speed is required for ...
Prem's user avatar
  • 460
1 vote
2 answers
1k views

What is the bare minimum of air density you need to fly a helicopter?

How high will a helicopter be able to fly before the propellers have not enough air particles to achieve lift? What is the minimum air density needed to achieve flight with a helicopter? Could you ...
Mohammed Ali's user avatar
-2 votes
1 answer
77 views

An interesting query about gravitation [duplicate]

If a helicopter flies linearly in the upward direction from a point A on the earth stays in the air at the same position for a long time and then linearly comes down , will it land at the same point A ...
Sameer Nilkhan's user avatar
0 votes
1 answer
161 views

Why dont we account the rotation of the earth in aircrafts? Is it just because of the air or is there more to it? [duplicate]

Today there was a seminar regarding modern air crafts held in my school. At the starting of the lecture, we were asked a question which I found quite intriguing. "Why does a helicopter or a fixed ...
Mike Victor's user avatar
0 votes
1 answer
151 views

Motion of a contrail “vortex”

I want to understand what causes this motion on contrails (Cirricular motion) and it’s name if possible. What effects it? How and why is it formed?
eggadg's user avatar
  • 1
-2 votes
1 answer
181 views

If Earth is curve and spinning, why plane flying in high altitude does not delayed?

If earth is spinning globe then the layer of athmosphere have a different tangential velocity for different altitude. For near the ground (solid surface of the earth) then the velocity of the air just ...
Mohammad Fajar's user avatar
1 vote
1 answer
1k views

Does aeroplane moving against Earth's rotation cause relative wind (assuming otherwise a quiet weather outside)?

Although, I know some answers, I need more affirmative and accurate answers. Why is the journey time from London to Singapore less compared to Singapore to London? Is it because of Earth's rotation ...
Abhay's user avatar
  • 13
2 votes
0 answers
75 views

Faster alternative to travel to any location in the west? [closed]

Suppose one needs to travel to Somalia from Indonesia(which are approximately at a distance of $4000$ miles from each other on the line of equator). To accomplish this task, I suggest the following ...
Akshay Bansal's user avatar
1 vote
2 answers
2k views

Hot Air Balloons: how is the Lift related to environmental conditions?

I'd like to build a small hot air balloon big enough to carry 0.8kg (a camera). The first thing I need to know is: once I have a big enough plastic bag and a big enough source of fire, how much will ...
themirror's user avatar
  • 153
5 votes
1 answer
3k views

Can a hovering helicopter travel half the globe in 12 hours? [duplicate]

Suppose we have a helicopter that is able to stay stationary in flight for extended periods of time. If such a helicopter stayed at point A in the sky for 12 hours straight, would it reach the other ...
cryptic0's user avatar
  • 161
25 votes
12 answers
13k views

Why do spacecrafts take off with rockets instead of just ascending like an aircraft until they reach space?

I guess it's not a very educated question, but I never quite understood why spacecrafts have to shoot up and can't just reach space by simply continuing an upwards ascent like an airplane.
clueless's user avatar
  • 251