Now, what about stopping the car? Once the web grabs onto the car, there will be two forces on the car: the downward gravitational force and the upward force from the web. All materials stretch a little bit. For simplicity, I will assume a stopping time that is also 1 second long. The momentum principle looks the same as before except there are two forces on the car and the final momentum is zero.
The strength of a material can be describe by the ultimate tensile strength. In order to get a maximum tension, you need to know the cross sectional area of the wire since obviously thicker wires are stronger. Here comes the first wild estimate ok, not the first. Let me approximate the web shot from Spider-Man as a cylindrical shape with a radius of 1 mm. If I replaced the web with real materials of the same size, this would be their maximum tension based on the values from Wikipedia.
Based on these calculations, it looks like carbon nanotube rope is the only thing that would work. Well, the steel cable could work but it would have to be much thicker with a radius of 2. In order to estimate the amount of webs, Spidey he lets his close friends call him Spidey can shoot, I need to first settle on the webs. I am going to go with carbon nanotube rope.
According to Wikipedia, this could have a density of around 0. How much webbing would Spider-Man need for just one shot? It seems like he primarily uses the webs for swinging. Using my initial estimate of a 1 mm radius web, this would be a super skinny and long cylinder.
The volume of this cylinder would be:. This would put the total web volume for one use at 6. That might be a little difficult to visualize in terms of the size.
How about a comparison to the volume of a standard pencil with a radius of 0. If all of this webbing was put into a pencil, the pencil would be 3. Well, then how big of a container would he need to have a reasonable number of shots?
In that case, we can find the web volume estimation by a factor of That gives a total volume per hand of 0. What would this look like if it fit around a wrist? If I use my own wrist for a basis, then I find that it has a circumference of In my web container design, I will let the cartridge go back 10 cm along my arm.
Now I can calculate the thickness of this container. Maybe a picture will help. Here is a look at my device looking down the arm. Using the values from my estimates, I get a container radius of 9.
Here is what that would look like. That looks a little awkward. But just imagine how large this thing would be the webs were something like nylon or steel cable instead of nanotube rope. I already said that it seems like these webs should be able to reach at least a 10 story building about 30 meters. What kind of launch speed would a web need to get this high?
Yes, that is obviously not realistic but I will proceed anyway. This is what makes the Internet so great. If a web is launched straight up, there will be only one force on it - the gravitational force. He then takes all three pieces and connects them with duct tape. This gives the prop flexible movement, allowing it to actually shoot the webs. After creating the bullet for the web shooter, he modifies a sewing needle to create a hook.
After this hook is attached, the web string can be looped onto it. His detachable web cartridge is made from cardboard, as well. Once the silver stripes have been applied, fishing line is attached with a small loop for his finger.
When he pulls on that wire, the webs are fired. He recommends using dental floss for the webs themselves. The finished product looks authentic and professional. It can also be reloaded easily with fairly inexpensive material.
Not only can fans create perhaps the most iconic Spider-Man tool of all time, but they can also do it almost entirely with materials found around the house thanks to this Sean's Crafts DIY.
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