bit-tech.net

Nerf Gun Modding

Comments 51 to 68 of 68

Reply
she'shighvoltage! 1st July 2010, 01:13 Quote
The clear Maverick is real, a friend of mine got it as a Christmas present two years back ;)
KayinBlack 1st July 2010, 01:14 Quote
Hah. SWMBO tells me I should do this for extra cash, since I paint so well. I think I will.
Wing Zero 1st July 2010, 02:01 Quote
Having quite a collection of modded nerf guns, this was a nice article to read, also highlighting some mods i haven't seen before.
Quote:
Originally Posted by Neat69
I've been slowly modifying a maverick for some time now (i.e when i get round to it) The cylinder swings out all the way now and after adding some resin into the cylinder it has enough weight to be able to spin it and then flick it closed :D

It's a shame they don't sell the longshot over here, the only way to get it is ebay from the US at stupid shipping prices :(

I don't see why you needed to weigh the cylinder of the maverick, mine moves just fine. it wasn't mentioned in the article, but there's a square block at the rear of the cylinder opening that needs cutting down to let the cylinder flip out fully.

the Longshot was on sale in the UK, but wasn't released by Hasbro UK. Toys R Us imported the longshot in themselves, so you may want to try there. saying this, TRU are at it again importing the LongStrike, the new Sniper rifle.
Quote:
Originally Posted by Lance
Yes they really do.

So what would you use to paint these?

I've been looking at modding my pc up a bit and this would be a far cheaper way to start to get the hang of it.

At the moment I'm thinking just buy some Games Workshop spray and then as everyone is saying stick a dry brush effect on it...
I'd recommend Acrylic based car paint for a base color, and Tamiya paint for details. not used GW paint, but as long as it's a hardwearing paint (since you'll be holding the gun, and possibly sliding parts on it) it should not flake off
Quote:
Originally Posted by Bloody_Pete
Just remember that if you paint the gun to look like a real gun, gun laws come into effect. I had to deal with this when I was Air Softing. So if you do fully repaint the guns, don't use them in public, as I'm sure the police will have words with you...

I've been wanting one of those Havoks for a long time now, but with 3 extra belts so it'll have a 100 round chain feed...

All of the nerf guns have orange tips. i'd recommend people who are painting their guns, even in bright colors, to LEAVE THE TIP ORANGE! also, magazines are also in orange, i tend to leave mine unpainted to highlight them as a toy.

Havoc Fire (AKA Vulcan in the US) is a fun gun, currently modifying mine into a TF2 Heavy's Sasha. it does tend to chew through cheap batteries, a decent brand last longer.
also, sad news for anyone wanting the 100 round belt. you can only join 2 belts together, making a 50 round belt, with a dud between the 2, 25 round belts.
Quote:
Originally Posted by Chombo
I always wondered exactly how accurate the "sniper rifle" nerf guns are.

I have long since donated my nerf arsenal to my assorted nephews who have abused them to the point of inoperability. I do find myself tempted to buy another one so I can dominate them but I would hardly use it to make the purchase worth it.

I am really impressed with the level of the mods, I especially like the steampunk ones. Though at this point I am more into modifying my real firearms over nerf ones. But they are still cook nonetheless.
the Longshot sniper rifle is an absolute PIG to fire accurately. the breach system leaks so much air at times that the major modification done is a complete rebuild of the breech system. the most common one is known as a 'Angel Breech' so you should start there. after that, custom built rounds, new springs (yes, multiple springs) and a bit of strengthening up some of the internals and you'll get a longshot to 75-100 feet range

As for quick domination, the Raider is the one you should be looking for. a 35 round drum magazine gives you more shots than the Havoc fire, and once you nail the slamfire technique, you can fire them faster than the havoc fire.


couple of quick tips to leave on:

want more magazines, a drum mag or havoc fire belts? contact Hasbro UK's customer service and ask for them. they're considered 'spare parts' for Nerf and are quite cheap. you'll need to buy ammo for them though.

speaking of ammo, there's 3 main types. Whistler, Streamline and Dart tag.
-Whistlers have a large rubber head that makes a whistle sound as they fly through the air. they work best with de-restricted, direct plunger type guns (nerf nitefinder)
-Dart tag rounds are the same as whistlers, but their heads are covered in velcro. not much use unless you're wearing dart tag armor or a wooley jumper. best avoided.
both of these types of ammo will NOT work with any of the clip system guns
-Streamlines have smaller heads which allow them to fit inside the magazines of the clip system guns. these darts work with ALL guns, however their smaller head causes them to fishtail out of control when you de-restrict the gun.

most of the clip system guns (longshot/strike, recon, raider) use a reverse plunger type of firing mechanism, where the piston is fixed to the barrel and a outer cylinder moves over the top of it. there's a quick and easy way to gain some more power, especially if you're a watercooler.
when your gun is disasembled, load a dart in the end of the barrel. then from the plunger head to the end of the dart, measure a length of 3/8"ID tubing (13-14mm) and wrap some tape rings on the ends and some in the middle, then push it inside the barrel from the plunger end. make sure the tape rings make a good airtight seal.
the narrower ID of the tubing reduces the amount of 'deadspace' in the plunger tube, thus forcing more air behind the dart, giving it more force
lacuna 1st July 2010, 11:53 Quote
Quote:
Originally Posted by Altron


Shimming will indeed increase the force available.

The potential energy held by the spring is half of the spring constant, times the displacement squared. This is the displacement from fully uncompressed.

If you compress a spring from fully uncompressed to being compressed by three inches, your energy is one half of the spring constant times 3^2 - 0^2 = 9 - 0 = 9
If you compress a spring from being compressed by two inches to being compressed by five inches, your energy is one half of the spring constant times 5^2 - 2^2 = 25 - 4 = 21.

That same 3" displacement now has over twice as much potential energy, because it is pre-loaded.

The change in force is the same, but the absolute force is higher, so the change in energy is higher.

Doesn't that calculation assume that the spring will be able to fully extend though? The finite space available in the gun obviously prevents full extension
Altron 1st July 2010, 14:21 Quote
Quote:
Originally Posted by lacuna
Doesn't that calculation assume that the spring will be able to fully extend though? The finite space available in the gun obviously prevents full extension

No, im my example it ends at 2" compression.

Energy is the square of compression. So uncompressed is zero energy, 1 unit of compression is 1 unit of energy, 2 units of compression is 4 units of energy, 3 units of compression is 9 units of energy, etc.

The total change in energy is the energy at the maximum compression minus the energy at the minimum compression.

Releasing from a 2" compression to zero compression is 4 - 0 = 4 units of energy from 2" of compression on an unloaded spring (factory)
Releasing from a 4" compression to zero compression is 16 - 0 = 16 units of energy on 4" of compression on an unloaded spring. (not possible due to size constraints)
Releasing from a 4" compression to a 2" compression is 16 - 4 = 12 units of energy of energy from 2" of compression on a pre-loaded spring (modded)

Make sense? Pre-loading the spring doesn't change the distance it is compressed, but since it is MORE compressed, the force is greater.
lacuna 1st July 2010, 17:49 Quote
Well, I have exhausted my physics knowledge so I shall just have to believe you but it sounds like you have solved the worlds energy problems if you can get more energy out of the extension of a spring than you put into compressing it
Helz 1st July 2010, 20:22 Quote
Quote:
Originally Posted by lacuna
Well, I have exhausted my physics knowledge so I shall just have to believe you but it sounds like you have solved the worlds energy problems if you can get more energy out of the extension of a spring than you put into compressing it

I'll try to explain it without fancy math then, although you were the one brought in the physics formulas in the first place. The unmodded gun has a spring in it that isn't fully compressed when the gun is ready to be fired. The pennies create less space in the chamber, and cocking the modded gun compresses the spring as far as it can go. Greater compression equals greater power.
CardJoe 1st July 2010, 21:46 Quote
I love the bit-tech community. I bring you a galley of painted toy guns. You turn it into a high-level physics discussion about the energy potential of springs.
Kilmoor 1st July 2010, 23:04 Quote
Quote:
Originally Posted by CardJoe
I love the bit-tech community. I bring you a galley of painted toy guns. You turn it into a high-level physics discussion about the energy potential of springs.

well, maybe a high-school level physics discussion...
CardJoe 2nd July 2010, 00:49 Quote
Quote:
Originally Posted by Kilmoor
well, maybe a high-school level physics discussion...

What can I say? I saw numbers and I glossed over.
Altron 2nd July 2010, 02:43 Quote
Quote:
Originally Posted by lacuna
Well, I have exhausted my physics knowledge so I shall just have to believe you but it sounds like you have solved the worlds energy problems if you can get more energy out of the extension of a spring than you put into compressing it

Negative. The spring is under more compression, so it requires more energy to compress it the same distance. Compressing it twice the distance takes four times as much energy, because the spring gets stiffer the more you compress it, and is thus harder to push. If you've ever just held a spring in your hand, it requires much less pressure to push it by 1" than it does to push it by 2".

Here's some further reading. This really isn't a difficult concept, but I don't like to see misinformation. Pre-loading will make a difference

http://zonalandeducation.com/mstm/physics/mechanics/energy/springPotentialEnergy/springPotentialEnergy.html
lacuna 2nd July 2010, 11:19 Quote
Okay, so correct me if (where) Im going wrong here:

A linear spring with a spring rate of 1lb/in will take 1lb of force to compress it 1 inch, correct? So, the same spring, because it is linear, will take 2 lbs of force to compress it 2 inches and so on.

Assume that the same spring is used in the gun and can compressed to a maximum of 4 inches. Assume also that as standard the slider used to compress the spring can compress it by 3 inches. 3 inches of compression would require 3lbs of force. So, you compress the spring, pull the trigger and the spring fully extends releasing the 3lbs of force that was put in.

If the same spring was preloaded by 1 inch then it has 1lb of force stored in it as potential energy. It now takes 1lb + 3lb to compress the spring. Once again, you compress the spring, pull the trigger and the spring extends the same 3 inches it did before as there is a finite space available within the gun. The spring remains preloaded by 1 inch and therefore retains the 1lb of force as potential energy so only 3lbs of force is released.
dispie 2nd July 2010, 11:51 Quote
woo nice see some really nice warhammer mods there
Tokukachi 5th July 2010, 20:39 Quote
Joe,

Please come to my house and explain to my Misses why I just spent £80 on nerf guns and bits to modify them. I blame you entirely for this, and it would be nice if she shouted at you instead of me :)

Pete
Altron 5th July 2010, 23:23 Quote
Quote:
Originally Posted by lacuna
Okay, so correct me if (where) Im going wrong here:

A linear spring with a spring rate of 1lb/in will take 1lb of force to compress it 1 inch, correct? So, the same spring, because it is linear, will take 2 lbs of force to compress it 2 inches and so on.

Assume that the same spring is used in the gun and can compressed to a maximum of 4 inches. Assume also that as standard the slider used to compress the spring can compress it by 3 inches. 3 inches of compression would require 3lbs of force. So, you compress the spring, pull the trigger and the spring fully extends releasing the 3lbs of force that was put in.

If the same spring was preloaded by 1 inch then it has 1lb of force stored in it as potential energy. It now takes 1lb + 3lb to compress the spring. Once again, you compress the spring, pull the trigger and the spring extends the same 3 inches it did before as there is a finite space available within the gun. The spring remains preloaded by 1 inch and therefore retains the 1lb of force as potential energy so only 3lbs of force is released.

You're mistaking force with energy. Energy is force applied over distance.

If you compress a 1 lb/in spring 3 inches... you are applying one pound of force over one inch, two pounds of force over the second inch, and three pounds of force over the third inch. That's 1 + 2 + 3 = 6 inch-pounds of energy for the first three inches of compression.

Let's say you keep going.The fourth inch requires four pounds of force, the fifth requires five pounds of force, and so on. For the next three inches of compression, it takes 4 + 5 + 6 = 15 inch-pounds of energy.

If you compress it three more inches, from 6" to 9", it takes 7 + 8 + 9 = 24 inch-pounds of energy.
Lance 7th July 2010, 00:00 Quote
Thankyou play.com for delivering my darts BEFORE the maveric.

That site has become pretty much useless, why did I shop there.
Da_Rude_Baboon 7th January 2011, 16:18 Quote
BUMP!

Sainsburys are selling the Maverick for a tenner at the moment. I saw one, remembered this article and immediately bought one. Spring and cylinder mod performed in half an hour at work.
Log in

You are not logged in, please login with your forum account below. If you don't already have an account please register to start contributing.



Discuss in the forums