How many helium balloons do you need to have the effect of a flying house?

I think that in fact, the lift of helium should be calculated here, not buoyancy. Based on the density of helium and air at a standard atmospheric pressure of 0°, the lift of helium can be calculated as.

There is no room temperature data so I won't do the exact calculations here), so it would take about 897 meters to provide one ton of lift. Suppose that the balloon here is a standard sphere, and the complex balloon is also a standard sphere after arrangement, regardless of the thickness of the balloon, the arrangement of the ropes, the collision situation, the closest arrangement and accumulation rate of the sphere.

897 meters meters because the above arrangement is a standard sphere, which is about a meter in diameter according to the sphere formula. The diameter of a single balloon is 23 centimeters, and the number of helium balloons within 897 meters is about 17,600.

Go to the decimal so neat! The weight of the house is estimated as follows (including balloons and ball ropes......Actually, it's negligible, I've calculated ......Add a balloon to a 10m long ball rope and add a balloon balloon to account for about 6% of the weight). I can be ignored.

Increase the weight of the 10m long balloon to about 6%). The density of building plywood is 5m (5m * 5m, the minimum standard room size of the hotel), and the plane is 25m (the roof is pointed, which is higher than the erection of ordinary houses, and the strength of the balloon connection should be considered) is concentrated in about 8m, multiplied. The house is expected to weigh tons, the cumulative volume of helium balloons is, and the total dimensions are about.

79,200 balloons. When I first saw the news, the movie ** said the number of balloons: 20,622, then you can also push back the size of the balloon or the weight of the house.

Then let's estimate the weight of the house (including balloons and ball rope......Actually, it's negligible, I've calculated ......Add a balloon to a 10m long ball rope and add a balloon balloon to account for about 6% of the weight).

The density of building plywood is tm, and a 25-square-meter (5 meters * 5 meters, the minimum standard room size of the hotel) is 5 meters high (the roof is pointed, higher than the ordinary house, and the strength of the balloon connection is also considered) into a plywood body of about 2 meters square is 8m, multiplied by the density of tons. Then the house weighs tons and the volume of helium balloons stacked is, the total size of which is about meters in diameter of the sphere. 10,000 balloons.

When I just checked the information, I saw that the official movie said that the number of balloons: 20,622, so you can also reverse the size of the balloon or the weight of the house.

At least 100 of them will have that spectacular spectacle.

I think that having a hydrogen balloon has the effect of "Flying House Travel".

I think it only takes more than 10 to create that effect.

If it's big enough, one is enough.

It's a lot, and you have to have more than 20 of them.

Putting too many hydrogen balloons can be dangerous.

It is estimated that there are many nitrogen balloons that cannot achieve that effect.

I think it takes a lot of balloons to create that effect.

This topic can be calculated using middle school physics, applying Archimedes' law, and the specific process is omitted. Based on the density ratio of hydrogen to air, it can be calculated that the buoyancy generated per cubic meter of hydrogen is kilograms. For the sake of calculation, assuming that the whole house weighs tons, then 1,000 cubic meters of hydrogen are needed, ignoring the weight of the balloon and the cable itself.

Let's assume that the balloon is a standard round shape. A common balloon has a radius of about 23 centimeters, so the volume of a balloon is 4 3 r 3 , which is about cubic meters. Then 1,000 cubic meters requires about 20,000 balloons.

The historic Hindenburg airship, 245 meters long, three times the length of the Boeing 747, has 203,760 cubic meters of airbags and a lift of 112 tons. This load is 100 times that of the flying house calculation above. (The volume of the gas is 200 times).

Based on this order of magnitude, you can imagine the size and number of balloons required for the flying house. Just as the Hindenburg was ultimately destroyed in a fire, the consequences of putting together huge amounts of hydrogen are catastrophic. If you have experienced those scenes in the movie, the protagonists will not fall to death because the wooden house exploded, so durable, that size of the wooden house, it is estimated that more than ten tons.

In the movie, this thing that looks like a log cabin is flying around, throwing around, and it doesn't rot, so there must be reinforcement. As for how to calculate, there is already a method, but the wooden house determines how many balloons to use, so the opinion of the wooden house is also very important. There are two issues that need to be addressed:

What is the unit buoyancy of a helium balloon. The flying house can be multiplied by multiplication, of course, how fast it is to save it. He said that one cubic meter of helium produces about one kilogram of buoyancy.

so。According to the animation inside the cabin. The weight is about 5 tons.

That's 5000 kilograms. Even if he has so much. If there is more, please dig a hole, and if there is less, please irrigate.

The answer is already out, 5000 cubic meters. Let's rough remove the balloon gaps. Add it 4000 squares.

It's so arrogant. If you want a precise answer, please skip it. then How big is 9000m?

95 meters high, 95 meters long, 95 meters wide, you can. In other words, a 20-storey residential building is the size of two buildings. Then you'll be able to take your chalet around with you.

Tying up hundreds of colorful balloons to travel is a dream that Pixar weaved for many people in the animated "Flying House". And what we're going to say today is that recently there was a guy who really turned this dream into reality and made a flight trip with 100 helium balloons strapped to it. He came to South Africa to start the challenge.

Before arriving in South Africa, he tried several balloon flights in Botswana, Africa, but failed, and South Africa became his blessed land. He spent two days charging 100 balloons and then — a little different from the movie — strapped the balloons to a light camping chair. He then sat on this chair and slowly rose into the air and flew 25 kilometers at an altitude of 2,438 meters.

Helium can only pull kilograms per cubic meter, I tried.