World Web shooter shop class - Part 3

[bobcat89]

Anyways.. Does anyone know how to do the math on how far the great planes would be able to fire? I'm actually thinking about converting it over to a single more powerful motor that spins two or more of the projectors maybe to give a little more momentum and conserve on space.. The smaller the better in this case

I don't think anyone will know that you will have to just do a trial and error.

 

[Iron Symbiote]

Sad face

 

[Elxiah]

Well not everyone has to go back to this topic i was just giving correct information.

I'm afraid that you are not giving correct information. But please allow me to give you a crash course in the physics of weight distribution and pressure on a pendulum.
Swinging like Tarzan is completely possible if you're athletic! Unfortunately, swinging like Spider-man is completely different.
(The following explanation has been shamelessly ripped from a very well done post by Nolder.)

1.) Consider that Peter Parker is 100 kg (around 220 lbs). That's pretty heavy but it gives us some some safety room and it makes the calculation a whole lot easier.
2.) Many sources state the Spider-Man can go 80 mph. This seems pretty high considering a lot of roller coasters max out at arround that speed. It's a slow day; Spidey doesn't have anywhere to be for once. So he's just cruisin'. Let's say he's going 45 mph, or about 20 m/s
3.) Let's say his web is 9 or 10 storys long (9 or 10 floors) so its about 30 meters
We use this formula to calculate how much the web would actually have to hold
F = M(V^2)/R
M is the mass, which is 100 kg
V is the velocity, 20m/s
R is the radius (his swings are really a series of half circles) which is 30 meters
F = M(V^2)/R = 100 kg * (20 m/s) ^2 / 30 m = 10^3 N
1000 N or 1000 newtons is 224 pounds. But don't get all excited yet. We still have to add a gravitational force of:
Fg = MG = 10^3 N.
So it's really like his web has to hold 2 x 10^3 N, or 450 pounds. More than twice his weight.
Granted, this is for a 220 pound Peter Parker, but it doesn't take into account other variables AND this is him going at a relatively slow speed.
If,
A) He weighed more
B) He was swinging faster or
C) His web was shorter
The web would have to hold greater force.
Let me make it clear that if you weigh half that he does (110 lbs), that does NOT mean the web will only have to hold half of what we calculated. Velocity, radius, and gravitational force would remain the same reguardless of your weight unless you changed them too.

Any type of acrobatics that you would want to do would put even more stress on it. Also, if you where trying to get somewhere fast, the force would become even greater. If you're rope can hold you, everything depends on your arms. Your arms, when you remember that they're just pieces of meat, are extensions of the rope that connects to you're body. The biology of your arm is made to put most of the pressure onto the pivot points of your arm: The wrist and shoulder. Take into the fact that you'd already be in a lot of stress and concentration when you're swinging, and you'd be scared up there, so you would be wiggling all over the place, making the stress greater. You would already be struggling to keep hold, and it would tug at your pivot points every time you swing.

So, if you wanted to swing like Tarzan however, as in fast on a short rope to another rope that is already relatively close to you, this is completely possible! In fact, most teens could do it. Tarzan swinging is most likely what you were thinking of.

Hope this helped!

 

[Elxiah]

if you would like to debate this further, please do it on the chat site. I do not wish to start an arguement due to the forum guidelines. But I'm sure it wouldn't come to that anyway.

 

[bobcat89]

you dont go on chatzy and your talking about 80mph i dont think i will be going anything close to that but a nice speed the length of the rope doesnt matter much if its strong and i dont think anyone can shoot a rope up a skyscraper so the ropes length is no concern and .Im sorry to say but the only thing that can affect me is going 80mph dont think ill do that but i can swing without hurting myself while putting pressure on my arms dude i weigh 130 i have been filling a backpack with 50lbs and climbing my rope to the top its 15 feet so im sure im athletic enough to hold my weight even under pressure The difference between spiderman and tarzans swinging is relly nothin spiderman does more acrobatics thats all nothing different about those swinging type and i doubt spiderman was 220 XD he doesnt even look 170

My information is still correct.

 

[Elxiah]

Okay, fine. Whatever you say. But the mathematical equations are right there. If you want to ignore the science, that's your decision. Like I said, I'm not going to argue. And what do you mean I don't go on chatzy? I'm there every day.

 

[bobcat89]

Okay, fine. Whatever you say. But the mathematical equations are right there. If you want to ignore the science, that's your decision. Like I said, I'm not going to argue. And what do you mean I don't go on chatzy? I'm there every day.

Your mathematics are only on how strong the web would need to be to hold someone 220 lbs your (science) doesn't prove anything but that.And who are you spiderman.So their would be no reason to argue because your formula does not disprove anything i said.

 

[Elxiah]

Your mathematics are only on how strong the web would need to be to hold someone 220 lbs your (science) doesn't prove anything but that.And who are you spiderman.So their would be no reason to argue because your formula does not disprove anything i said.

I'm morpheus.

 

[Iron Symbiote]

I'm morpheus.

^^^^

 

[Iron Symbiote]

so back on subject, I just attempted the math and someone please tell me where I'm wrong...

so the rimfire motor goes at 1750RPM/V. I'm assuming with good reason that that /V means per volt. the maximum voltage that the motor can take is 11.1v. that makes the RPM 19425. Now using a RPM to MPH conversion I found on Google, and assuming the wheels firing the projectile in the web shooter would be .15in in diameter. so using that .15in and multiplying by pie (3.14) you get 0.417, times the RPM you get 9149.175, times 60 to convert feet per minute to feet per hour, you get 548590.5, then divide by 5280 for feet in miles makes 103.967.. you get the idea.. while I'm not sure that this number is the speed of the projectile or how that would even be calculated but I have trouble believing the motor can go that fast.. but if it can then I don't see this being an unrealistic project.

thoughts?

 

[bobcat89]

so back on subject, I just attempted the math and someone please tell me where I'm wrong...

so the rimfire motor goes at 1750RPM/V. I'm assuming with good reason that that /V means per volt. the maximum voltage that the motor can take is 11.1v. that makes the RPM 19425. Now using a RPM to MPH conversion I found on Google, and assuming the wheels firing the projectile in the web shooter would be .15in in diameter. so using that .15in and multiplying by pie (3.14) you get 0.417, times the RPM you get 9149.175, times 60 to convert feet per minute to feet per hour, you get 548590.5, then divide by 5280 for feet in miles makes 103.967.. you get the idea.. while I'm not sure that this number is the speed of the projectile or how that would even be calculated but I have trouble believing the motor can go that fast.. but if it can then I don't see this being an unrealistic project.

thoughts?

I think that you should change it to fps(feet per seconds) this will be the best way to tell how far it will go more like a gun not a car fph or fpm

 

[Iron Symbiote]

In fps that comes out to 152.48265.. Which is significantly less impressive

 

[bobcat89]

In fps that comes out to 152.48265.. Which is significantly less impressive

Well a paintball gun goes 350 fps at average so im thinking your gonna wanna be atleast that high

 

[bobcat89]

Is that one motor or two

 

[Wadaltmon]

I'm morpheus.

I don't think he's asking if you were "spider,man"... I think he is saying, "What are you, the real Spider-Man? You don't know." But then again I could be wrong.

 

[Wadaltmon]

Guys I don't know if I'll be able to post on Youtube anymore. Possibly there will be some protocols put in place with stricter copyright rulings, and since Spider-Man, the music I use, and the web shooters are all Marvel's things...

 

[Iron Symbiote]

Guys I don't know if I'll be able to post on Youtube anymore. Possibly there will be some protocols put in place with stricter copyright rulings, and since Spider-Man, the music I use, and the web shooters are all Marvel's things...

take out the music and use a different name but please keep posting vids I love your work!!!

 

[Iron Symbiote]

Is that one motor or two

thats per motor but more motors doesn't change the speed

 

[bobcat89]

It might give it more power.

 

[GDY]

Hi guys, literally just made an account
But I have read through some of the original thread and a little bit of this one. I have a couple of questions though,
1) to get the pressurisation would it be possible to use gas cans off of a gas powered bb gun
2)if we actually got all of this working wouldn't the swing off the string have the force to be able to rip an arm off?
3) if the string/thread/rope was there how would we be able to hold it beings it wouldn't be the thickest material and how would we get it to release when finished with that strand?

Anyways sounds like a brilliant thread, I may be able to help with some engineering side of things as I am currently studying level 3 electrical engineering at college hoping to go onto the degree.

 

[bobcat89]

Hi guys, literally just made an account
But I have read through some of the original thread and a little bit of this one. I have a couple of questions though,
1) to get the pressurisation would it be possible to use gas cans off of a gas powered bb gun
2)if we actually got all of this working wouldn't the swing off the string have the force to be able to rip an arm off?
3) if the string/thread/rope was there how would we be able to hold it beings it wouldn't be the thickest material and how would we get it to release when finished with that strand?

Anyways sounds like a brilliant thread, I may be able to help with some engineering side of things as I am currently studying level 3 electrical engineering at college hoping to go onto the degree.

Yes you could use gas like co2.If you had the rope/string/thread strong enough to hold your body swinging will not rip your arm off.If you used thin rope you could make gloves to easily hang on to the rope or make a wrist harness to hold it but they are using a formula so i dont think they will make it strong enough to hold body weight.

 

[spidey44]

Bobcat that doesn't make any sense. The strength of the rope and the forces on your body are two different things.

 

[bobcat89]

I know and you must not be reading it right read his then read mine im saying if he HAS the string/rope/thread to hold his body just if he has the rope to hold his weight.He can swing without ripping an arm off their are no comparison between the two that i make in my sentence.Hope i clarified it.

 

[spidey44]

So your are saying he doesn't hold the rope it's attached to his body?

 

[asm13]

What happened to the web formula thread?