*Gate 3: Product Analysis - Revision history

MAE 277 2012 - Group 5: /* Product Analysis */

2012-12-06T22:07:45Z

Product Analysis

MAE 277 2012 - Group 5: /* Component Summary */

2012-12-06T21:57:26Z

Component Summary

MAE 277 2012 - Group 5: /* Design Revisions: */

2012-12-06T17:19:27Z

Design Revisions:

MAE 277 2012 - Group 5: /* Engineering Analysis */

2012-12-06T17:15:31Z

Engineering Analysis

MAE 277 2012 - Group 5: /* Design Revisions: */

2012-12-06T08:02:52Z

Design Revisions:

MAE 277 2012 - Group 5: /* Engineering Analysis */

2012-12-06T07:58:58Z

Engineering Analysis

MAE 277 2012 - Group 5: /* 7. Ring: */

2012-12-06T07:49:31Z

7. Ring:

MAE 277 2012 - Group 5: /* 5. Air Chamber 2: */

2012-12-06T07:48:36Z

5. Air Chamber 2:

MAE 277 2012 - Group 5: /* 5. Air Chamber 2: */

2012-12-06T07:47:07Z

5. Air Chamber 2:

MAE 277 2012 - Group 5: /* 5. Air Chamber 2: */

2012-12-06T07:42:08Z

5. Air Chamber 2:

@@ Line 115: / Line 115: @@
 ::'''Manufacturing Methods:''' The manufacturing methods necessary to make the Internal Air Shaft Spring were drawing and coiling.  First, the steel must be ductile enough to be pulled through a diet to obtain the desired profile of a wire.  This wire is then coiled to the desired shape.  Due to the spring’s thin and delicate quality, molding and casting cannot be used to manufacture the part.  The manufacturing process of drawing allows for thin, intricate geometries to be created and coiling then shapes the wire into the desired spiral shape.  When considering the application of this manufacturing process, an economic factor that influenced this selection is that drawing is economical for larger runs.  This manufacturing process imparts good quality upon the product which allows for the manufactured product to be safe when used, thus taking into account societal factors.  This manufacturing also allows for a long life span and functionality of the product; therefore, decreasing its long term environmental impacts.  When global factors are considered, this process is the ideal choice because there is a large availability of steel to be used. The Internal Air Shaft Spring figure shows the result of coiling.
 [[File:Main Spring Group5.JPG|center|thumb|caption|Internal Air Shaft Spring: The coiling shape shows the result of the coiling manufacturing process.|250px]]
-::'''Component Complexity:''' The Internal Air Shaft Spring has a component function complexity of 3.  The function of the Major Spring requires energy, making it a complex function. When the Cocking Bolt is pulled back, the spring is compressed, storing energy.  This energy is necessary for the main funtion of firing the dart. Therefore, because of the Internal Air Shaft Spring's significance, it was given a greater complexity rating. The geometry of the component is also given a complexity rating of 3 because of its complex feature of coiling.  Only one material is used in the manufacturing of the Internal Air Shaft Spring; therefore, it was given a material complexity rating of 1. Finally, when the manufacturing methods used to create the spring are analyzed, it is determined that two manufacturing methods are needed, drawing and coiling; therefore, the manufacturing method complexity is given a rating of 2. The interaction complexity for this component is given a rating of 1. This component only corresponds to one function which is the compression of the spring due to Air Chamber 2.
+::'''Component Complexity:''' The Internal Air Shaft Spring has a component function complexity of 3.  The function of the Major Spring requires energy, making it a complex function. When the Cocking Bolt is pulled back, the spring is compressed, storing energy.  This energy is necessary for the main function of firing the dart. Therefore, because of the Internal Air Shaft Spring's significance, it was given a greater complexity rating. The geometry of the component is also given a complexity rating of 3 because of its complex feature of coiling.  Only one material is used in the manufacturing of the Internal Air Shaft Spring; therefore, it was given a material complexity rating of 1. Finally, when the manufacturing methods used to create the spring are analyzed, it is determined that two manufacturing methods are needed, drawing and coiling; therefore, the manufacturing method complexity is given a rating of 2. The interaction complexity for this component is given a rating of 1. This component only corresponds to one function which is the compression of the spring due to Air Chamber 2.
 ====2. Barrel Tube:====
@@ Line 131: / Line 131: @@
 ====3. Trigger:====
-::'''Component Function:''' The main function of the trigger is to release the spring and air chamber system from its loaded position.  The Cocking Bolt is pulled back, compressing the spring.  When the Trigger is pressed, the spring is released, along with the two air chambers.  Air is forced through the air chamber which then forces the bullet to move. The pulling of the trigger causes a “domino” effect inside the base of the gun.  The trigger is pulled, releasing the spring, which then releases chamber 1 and 2.  The trigger can function in an indoor or outdoor setting and is built to withstand rough use. The trigger is necessary  in order for the main function of the system to perform; therefore, the trigger must be able to function in any setting.
+::'''Component Function:''' The main function of the Trigger is to release the spring and air chamber system from its loaded position.  The Cocking Bolt is pulled back, compressing the spring.  When the Trigger is pressed, the spring is released, along with the two air chambers.  Air is forced through the air chamber which then forces the bullet to move. The pulling of the trigger causes a “domino” effect inside the base of the gun.  The Trigger is pulled, releasing the spring, which then releases chamber 1 and 2.  The Trigger can function in an indoor or outdoor setting and is built to withstand rough use. The Trigger is necessary  in order for the main function of the system to perform; therefore, the trigger must be able to function in any setting.
-::'''Component Form:''' The shape of the Trigger is complex consisting of a long stick attached to a semi-circle, where the user touches the trigger to fire the gun.  The trigger is not symmetric; however, symmetric shapes are located throughout the component.  At the end of the stick, a rectangular hook is attached which allows for a connection between the Trigger and Air Chamber 1.  The component is primarily a three-dimensional part that consists of the following dimensions:
+::'''Component Form:''' The shape of the Trigger is complex consisting of a long stick attached to a semi-circle, where the user touches the Trigger to fire the gun.  The Trigger is not symmetric; however, symmetric shapes are located throughout the component.  At the end of the stick, a rectangular hook is attached which allows for a connection between the Trigger and Air Chamber 1.  The component is primarily a three-dimensional part that consists of the following dimensions:
 :::Length: 12.6 cm
 :::Width: 1.1 cm
 :::Height: 3.8 cm
 :::Mass: 10.2 g
-::The semi-circular shape on the Trigger adheres to the form of a human finger, which is the part of the human body that applies force to Trigger.  The material of the tube also plays a role in the components function.  The trigger is made of a plastic material.  Because this Nerf Longstrike CS-6 is a toy, the material of the product had to be sturdy enough to handle rough use for the intended children ages 6 and older that are expected to use this toy.  Plastic is also an inexpensive material that can be used to mass produce this product and keep the price of the product affordable for consumers. The semi-circular section of the Trigger is the only visible part of the component when the Nerf gun is fully assembled.  Therefore, this part of the trigger is fileted and appeals aesthetically to the user.  The Trigger is made of an orange plastic which goes along with the color scheme of the Nerf brand.  The component is smooth and rounded with a glossy finish to create a finished look to the part and increase aesthetic appeal.  This also allows for increased comfort of the user when pulling the trigger.
+::The semi-circular shape on the Trigger adheres to the form of a human finger, which is the part of the human body that applies force to Trigger.  The material of the tube also plays a role in the components function.  The Trigger is made of a plastic material.  Because this Nerf Longstrike CS-6 is a toy, the material of the product had to be sturdy enough to handle rough use for the intended children ages 6 and older that are expected to use this toy.  Plastic is also an inexpensive material that can be used to mass produce this product and keep the price of the product affordable for consumers. The semi-circular section of the Trigger is the only visible part of the component when the Nerf gun is fully assembled.  Therefore, this part of the trigger is fileted and appeals aesthetically to the user.  The Trigger is made of an orange plastic which goes along with the color scheme of the Nerf brand.  The component is smooth and rounded with a glossy finish to create a finished look to the part and increase aesthetic appeal.  This also allows for increased comfort of the user when pulling the trigger.
 ::'''Manufacturing Methods:''' Only one manufacturing method, injection molding, was used in the making of the Trigger.  Molten plastic was forced into a mold to create this component.  Riser marks as well as parting lines, shown in the Trigger Parting Line photo, can be found on the part, which is a main characteristic of injection molding.  The material of the part is plastic which is also used for the injection molding process. Injection molding is good for small to medium sized parts and creates a fine surface finish; therefore, Group 5 concluded that injection molding was used to create the Trigger.  When considering the application of this manufacturing process, an economic factor that influenced this selection is that injection molding is economical for larger runs.  Also, plastic can be melted down and reused in this process, almost eliminating its negative effect on the environment.  This process also produces parts that are in good detail as well as achieve a fine surface finish, which as a societal concern is a good quality part.
 [[File:Trigger.png|center|thumb|caption|Trigger Parting Line: Parting line illustrates the use of injection molding manufacturing|250px]]
@@ Line 167: / Line 167: @@
 ====6. Cocking Bolt:====
-::'''Component Function:''' The main function of the Cocking bolt is to load the gun by pulling the air chamber and the spring back, allowing for potential energy to be generated.  When human energy is applied to the cocking bolt, the bolt is pushed back which directly causes Air Chamber 1 to be pulled back and compress the Internal Air Shaft Spring.  Potential energy is then stored in the spring.  The Cocking Bolt is located on the outside of the base of the Nerf gun and is directly used by the user.  Therefore, this component can be used in an outdoor or indoor environment.
+::'''Component Function:''' The main function of the Cocking Bolt is to load the gun by pulling the air chamber and the spring back, allowing for potential energy to be generated.  When human energy is applied to the cocking bolt, the bolt is pushed back which directly causes Air Chamber 1 to be pulled back and compress the Internal Air Shaft Spring.  Potential energy is then stored in the spring.  The Cocking Bolt is located on the outside of the base of the Nerf gun and is directly used by the user.  Therefore, this component can be used in an outdoor or indoor environment.
 ::'''Component Form:''' The general shape of the Cocking Bolt consists of two rounded knobs with a central axle holding the two together.  The component is primarily three-dimensional with the following dimensions:
 :::Length of Axle: 7.8 cm

@@ Line 20: / Line 20: @@
 In the previous stage of the design team's project, the group members disassembled the Nerf Longstrike CS-6. Throughout this process, a component chart was made for each component found in the Nerf gun. This was done in order to better classify each part as well a to allow for a better understanding of the functionality of each component to its immediate subsystem and to the overall function of the Nerf gun. For each part,a number of identifying factors were recorded. First, the component name, the quantity of the component, and the specific material used was recorded. From here, the material used as well as the design of each component was analyzed in order to determine the best manufacturing process for each part. The reasons that correspond each component to its manufacturing process are the following:
-:*'''Injection Molding:'''This manufacturing process is used to force liquid plastic into a mold in order to create small to medium sized parts. Key characteristics of this process are riser marks, draft, and parting lines. These are a result of the mold being taken apart from the plastic component once it is cooled and hardened. Components listed under this manufacturing process were chosen by the design team because they were made of plastic, had riser marks, and were of good detail that an injection mold has the potential to create. The following three pictures of the Base, the Base Divider, and Shoulder Stock, respectively, show examples of riser marks. Similar features were found in the remaining injection molded parts. Note: The rubber and foam components were injection molded with their corresponding materials.
+:*'''Injection Molding:'''This manufacturing process is used to force liquid plastic into a mold in order to create small to medium sized parts. Key characteristics of this process are riser marks, draft, and parting lines. These are a result of the mold being taken apart from the plastic component once it is cooled and hardened. Components listed under this manufacturing process were chosen by the design team because they were made of plastic, had riser marks, and were of good detail that an injection mold has the potential to create. The following three pictures of the Main Base, the Base Divider, and Shoulder Stock, respectively, show examples of riser marks. Similar features were found in the remaining injection molded parts. Note: The rubber and foam components were injection molded with their corresponding materials.
-[[File:Base Riser Marks Group5.jpg|center|thumb|'''Base Riser Marks:''' The circles in the picture outline examples of riser marks located on the inside of the Base showing injection molding.|250px]]
+[[File:Base Riser Marks Group5.jpg|center|thumb|'''Base Riser Marks:''' The circles in the picture outline examples of riser marks located on the inside of the Main Base showing injection molding.|250px]]
 [[File:Base Divider Riser Marks Group 5.jpg|center|thumb|'''Base Divider Riser Marks:''' The circles in the picture outline examples of riser marks located on the inside of the Base Divider showing injection molding.|250px]]
 [[File:Should Stock Riser Marks Group 5.jpg|center|thumb|'''Shoulder Stock Riser Marks:''' The circles in the picture outline examples of riser marks located on the inside of the Shoulder Stock showing injection molding.|250px]]
@@ Line 33: / Line 33: @@
 [[File:Screw.JPG|center|thumb|'''Screw:'''the threading of the screw shows that the manufacturing process is turning|250px]]
-The component chart also classified each part's part number if it was applicable. This number contained number(s), letter(s), or a combination of both. This number is used during the assembly processed, often used to distinguish the left side from the right. The design team also determined the function of each component and any observations. Note: in the observations section, there is a sub-level, connection to major component, which describes where that component is in one of the five major components: Barrel Extension, Shoulder Stock, Quick-Reload Clip, Base, and Flip-Up Sight. A picture of each component was also taken. The following component catalog links each specific component to its chart information as follows:
+The component chart also classified each part's part number if it was applicable. This number contained number(s), letter(s), or a combination of both. This number is used during the assembly processed, often used to distinguish the left side from the right. The design team also determined the function of each component and any observations. Note: in the observations section, there is a sub-level, connection to major component, which describes where that component is in one of the five major components: Barrel Extension, Shoulder Stock, Quick-Reload Clip, Main Base, and Flip-Up Sight. A picture of each component was also taken. The following component catalog links each specific component to its chart information as follows:
 {| style="text-align: center;" width="100%" class="wikitable"

@@ Line 262: / Line 262: @@
 :'''Sniper Stand'''
-Another design change for the Nerf gun that would positively affect its performance is the addition of a Sniper Stand. It would not be necessary to remove any part of the current Longstrike CS-6 gun for the addition of a sniper stand. The stand and gun would need to have rails built in so that they can be attached to one another yet easily removed when need be. The rail on the stand would be compatible with any Nerf blaster in the N-Strike series, allowing for the stand to be used amongst the product family. The legs of the stand would be foldable so that the stand would become small, portable, and easily stored. The Sniper Stand would increase the accuracy of the Longstrike CS-6 or any other Nerf gun that it was used with. It would also allow the gun to have versatility and be used in more than just one way. These factors would increase the sales, marketability, and user enjoyment by improving the accuracy of the Longstrike CS-6. These adjustments and additions to the gun affect both societal and economic concerns.
+Another design change for the Nerf gun that would positively affect its performance is the addition of a Sniper Stand. It would not be necessary to remove any part of the current Longstrike CS-6 gun for the addition of a sniper stand. The stand and gun would need to have rails built in so that they can be attached to one another yet easily removed when need be. The rail on the stand would be compatible with any Nerf blaster in the N-Strike series, allowing for the stand to be used amongst the product family. The legs of the stand would be foldable so that the stand would become small, portable, and easily stored. The Sniper Stand would increase the accuracy of the Longstrike CS-6 or any other Nerf gun that it was used with. It would also allow the gun to have versatility and be used in more than just one way.  Although the addition of a Sniper Stand will increase the price of the Nerf gun, thus affecting the product economically, Group 5 suggests that the Sniper Stand be sold separately allowing the Hasbro Company to make a greater profit.  These factors would increase the sales, marketability, and user enjoyment by improving the accuracy of the Longstrike CS-6. These adjustments and additions to the gun affect both societal and economic concerns.
 =='''Related Information'''==

@@ Line 246: / Line 246: @@
 :::(3) E=1/2 kx^2
-*The main goal of this engineering analysis is to computationally calculate the spring constant of the Internal Air Shaft Spring in the Nerf gun by making assumptions, such as ignoring friction and air resistance.  However, the results of this computation are sensitive to the friction between the foam dart and the Internal Air Shaft of the Nerf gun, as well as the air resistance the dart encounters while in the air after being shot.  Therefore, the spring constant could also be calculated experimentally, taking these two factors into consideration, resulting in a more accurate result.
+*The main goal of this engineering analysis is to computationally calculate the spring constant of the Internal Air Shaft Spring in the Nerf gun by making assumptions, such as ignoring friction and air resistance.  The spring constant can be found by using various distances and calculating the value in EXCEL. However, the results of this computation are sensitive to the friction between the foam dart and the Internal Air Shaft of the Nerf gun, as well as the air resistance the dart encounters while in the air after being shot.  Therefore, the spring constant could also be calculated experimentally, taking these two factors into consideration, resulting in a more accurate result.
 ===Design Revisions:===

@@ Line 256: / Line 256: @@
 :'''Crank'''
-A second possible design revision to the original Nerf Longstrike CS-6 would be an addition of a crank loading mechanism. This would replace the Paul and Ratchet mechanism currently implemented with the cocking bolt. Now, a crank with gears on it would be used to load the gun and pull the air chambers back.  This would involve the removal of the Cocking Bolt, the addition of a hand crank connected to a gear, and a slider connected to the air chamber with gears on the bottom. A picture of this design revision is shown below in Revision Two. An effect of this replacement of the Cocking Bolt with the crank system is that it would allow for a greater range. This is because a hand crank could create a larger force which would support a spring with a stronger spring constant to be used. This would then allow for a large return force on the foam dart. Thus, the darts that shoot out of the barrel will have a higher acceleration sending them further distances. The crank would also make it easier to load the gun as the Cocking Bolt currently uses two hands in order to pull the system back. Also, by removing the Cocking Bolt and adding a crank, it increases the safety of the product. The crank eliminates the potential safety hazard that the Cocking Bolt creates with the sliding of the rails where a small child could easily pinch their fingers before, during, and after the shooting of the dart. This design revision would meet global and safety standards around the world as well as be more appealing to the public due to the higher safety precautions. All of these factors show that a crank would be a beneficial change to the Nerf gun, causing a safer enjoyment by the user.
+A second possible design revision to the original Nerf Longstrike CS-6 would be an addition of a crank loading mechanism. This would replace the linear cam mechanism currently implemented with the cocking bolt. Now, a crank with gears on it would be used to load the gun and pull the air chambers back.  This would involve the removal of the Cocking Bolt, the addition of a hand crank connected to a gear, and a slider connected to the air chamber with gears on the bottom. A picture of this design revision is shown below in Revision Two. An effect of this replacement of the Cocking Bolt with the crank system is that it would allow for a greater range. This is because a hand crank could create a larger force which would support a spring with a stronger spring constant to be used. This would then allow for a large return force on the foam dart. Thus, the darts that shoot out of the barrel will have a higher acceleration sending them further distances. The crank would also make it easier to load the gun as the Cocking Bolt currently uses two hands in order to pull the system back. Also, by removing the Cocking Bolt and adding a crank, it increases the safety of the product. The crank eliminates the potential safety hazard that the Cocking Bolt creates with the sliding of the rails where a small child could easily pinch their fingers before, during, and after the shooting of the dart. This design revision would meet global and safety standards around the world as well as be more appealing to the public due to the higher safety precautions. All of these factors show that a crank would be a beneficial change to the Nerf gun, causing a safer enjoyment by the user.
 [[File:Revision.png|thumb|center|caption|Revision Two: Replacing the Cocking Bolt with a hand crank and gears.| 350px]]

@@ Line 213: / Line 213: @@
 ===Engineering Analysis===
 :After completing a thorough analysis of the seven components and creating a solid model of four of those components, Group 5 then decided to analyze a specific function of the Nerf gun system using the Engineering Analysis Process.  Using diagrams and governing equations, the first four steps of the process were set up to find the deformation in the spring needed to get the desired trajectory.
-::'''Problem Statement:''' Knowing the specific range, x, and the specific height of the ground, z, what deformation in the spring is needed to get the desired trajectory?
+::'''Problem Statement:''' Knowing the specific range, d, and the specific height of the ground, z, what deformation in the spring is needed to get the desired trajectory?
 :::Given:
 ::::d= 35 ft
@@ Line 246: / Line 246: @@
 :::(3) E=1/2 kx^2
+*The main goal of this engineering analysis is to computationally calculate the spring constant of the Internal Air Shaft Spring in the Nerf gun by making assumptions, such as ignoring friction and air resistance.  However, the results of this computation are sensitive to the friction between the foam dart and the Internal Air Shaft of the Nerf gun, as well as the air resistance the dart encounters while in the air after being shot.  Therefore, the spring constant could also be calculated experimentally, taking these two factors into consideration, resulting in a more accurate result.
 ===Design Revisions:===

@@ Line 186: / Line 186: @@
 :::Mass: 6.1 g
 ::The circular shape of this component is necessary so that it will align with the circular shape of the tip of the base and allow for attachment.  The component is made of a plastic material.  Plastic is a strong and durable material that can handle the air pressure inside the chamber.  It is also an inexpensive material that can be used to mass produce this product and keep the price of the product affordable for consumers.  A strong material is necessary to allow for a strong a durable connection between the Barrel Extension and the Base.  The Ring is made with orange plastic which goes with the color scheme of Nerf products.  The surface finish of the component is smooth and glossy to allow for a smooth attachment between parts as well as to continue the aesthetic appeal of the entire product.
-::'''Manufacturing Methods: '''Only one manufacturing method, injection molding, was used in the making of the Ring.  Molten plastic was forced into a mold to create this component.  Riser marks, illustrated in the Ring Riser Mark photo, as well as parting lines can be found on the part, which is a main characteristic of injection molding.  The material of the part is plastic which is also used for the injection molding process. Injection molding is good for small to medium sized parts and creates a fine surface finish; therefore, injection molding was used to create the Ring which is a small sized part with a smooth finish. When considering the application of this manufacturing process, an economic factor that influenced this selection is that injection molding is economical for larger runs.  Also, plastic can be melted down and reused in this process, almost eliminating its negative effect on the environment.  This process also produces parts that are in good detail as well as achieve a fine surface finish, which as a societal concern is a good quality part.  When global factors are considered, this process is the ideal choice because there is a large availability of steel to be used.
+::'''Manufacturing Methods: '''Only one manufacturing method, injection molding, was used in the making of the Ring.  Molten plastic was forced into a mold to create this component.  Riser marks, illustrated in the Ring Riser Mark photo, as well as parting lines can be found on the part, which is a main characteristic of injection molding.  The material of the part is plastic which is also used for the injection molding process. Injection molding is good for small to medium sized parts and creates a fine surface finish; therefore, injection molding was used to create the Ring which is a small sized part with a smooth finish. When considering the application of this manufacturing process, an economic factor that influenced this selection is that injection molding is economical for larger runs.  Also, plastic can be melted down and reused in this process, almost eliminating its negative effect on the environment.  This process also produces parts that are in good detail as well as achieve a fine surface finish, which as a societal concern is a good quality part.
 [[File:Ring.png|center|caption|thumb|Ring Riser Mark: The riser mark illustrates the use of the injection molding manufacturing process.|250px]]
 ::'''Component Complexity:''' The Ring aids in the connection and support between the Barrel Extension and the Base of the Nerf gun; therefore, the component function complexity of the part is given a rating of 1.  The part also consists of one to two simple features, such as extrusion and cutting, thus the geometric complexity of the part is given a rating of 1.  Because the Ring is only made of plastic, the material complexity of the component is also given a 1.  Finally, only one manufacturing process, injection molding, is used in the making of the Ring; therefore, the manufacturing method complexity is given a rating of 1.  The interaction complexity for this component is given a rating of 2. This component corresponds to two functions; stability of the Barrel Tube and the connection between the Barrel Extension and the Base.  If this component fails, neither of these functions can be completed.

@@ Line 162: / Line 162: @@
 :::Mass: 5.0 g
 ::Because one end of the cylindrical tube is closed, the air is allowed to be forced into the chamber and thus into Air Chamber 1 which then causes the dart to move.  The cylindrical shape is also important because it must cover Air Chamber 1.  The material of Air Chamber 2 also plays a role in the components function.  The chamber is made of a plastic material.  Plastic is a strong and durable material that can handle the air pressure inside the chamber.  It is also an inexpensive material that can be used to mass produce this product and keep the price of the product affordable for consumers. The air chamber is not seen by the consumer; therefore, aesthetics did not play a large role in the design of this component. The color of the chamber is bright orange, which follows with the color scheme of the Nerf brand.  Air Chamber 2 has a smooth surface finish and is also layered with grease on the outside and the inside of the chamber.  This decreases the friction between Air Chamber 1 and the Internal Air Shaft Spring as well as between Air Chamber 1 and Air Chamber 2.
-::'''Manufacturing Methods:''' Only one manufacturing method, injection molding, was used in the making of Air Chamber 2.  Molten plastic was forced into a mold to create this component.  Riser marks as well as parting lines can be found on the part, as shown in the Air Chamber 2 Parting Line photo, which is a main characteristic of injection molding.  The material of the part is plastic which is also used for the injection molding process. Injection molding is good for small to medium sized parts and creates a fine surface finish; therefore, injection molding was used to create the chamber which is a small sized part with a smooth finish. When considering the application of this manufacturing process, an economic factor that influenced this selection is that injection molding is economical for larger runs.  Also, plastic can be melted down and reused in this process, almost eliminating its negative effect on the environment.   A societal concern of this manufacturing method is that a good quality part must be made. Injection molding produces parts that are in good detail as well as achieve a fine surface finish.
+::'''Manufacturing Methods:''' Only one manufacturing method, injection molding, was used in the making of Air Chamber 2.  Molten plastic was forced into a mold to create this component.  Riser marks as well as parting lines can be found on the part, as shown in the Air Chamber 2 Parting Line photo, which is a main characteristic of injection molding.  The material of the part is plastic which is also used for the injection molding process. Injection molding is good for small to medium sized parts and creates a fine surface finish; therefore, injection molding was used to create the chamber which is a small sized part with a smooth finish. When considering the application of this manufacturing process, an economic factor that influenced this selection is that injection molding is economical for larger runs.  Also, plastic can be melted down and reused in this process, almost eliminating its negative effect on the environment.   A societal concern of this manufacturing method is that a good quality part must be made. Injection molding produces parts that are in good detail as well as achieve a fine surface finish, addressing societal concerns.
 [[File:Gg5.png|center|caption|thumb|Air Chamber 2 Parting Line: The parting line illustrates the use of the injection molding process.|250px]]
 ::'''Component Complexity:''' The function complexity of Air Chamber 2 is given a rating of 3 because of the complex function of aiding in the energy flow of the system.  The air chamber forces air through the first chamber thus forcing the foam dart to move.  The geometric complexity of the air chamber can be given a rating of 3 because many complex features, such as extrusions, cut outs, filets, and mirroring are found on the part.  The component is only made of one material; therefore, the material complexity of the component is given a rating of 1.  Finally, because only injection molding is used in the manufacturing of the component, the manufacturing method complexity is given a rating of 1. The interaction complexity for this component is given a rating of 2. This component corresponds to multiple functions; it acts as a chamber of air which converts to a force on the dart and it applies a force on the spring before release.

@@ Line 156: / Line 156: @@
 ====5. Air Chamber 2:====
-::'''Component Function:''' Air Chamber 2 acts as the second half of the air chamber.  The part provides a force on the dart, aiding in applying additional energy to the foam dart.  The Internal Air Shaft Spring surrounds the second air chamber.  When the cocking bolt is pulled back and the spring is loaded, the second air chamber is also pulled back.  When the trigger is pulled and the first air chamber and spring are released, Air Chamber 2 forces air though the chamber which then forces the foam dart to move.  This component aids in the transfer of kinetic energy from the spring-piston system to the foam dart.  Air Chamber 1 is located inside the Base of the Nerf gun.  The user does not directly interact with the chamber; therefore, the chambers environment is located inside the base of the gun.
+::'''Component Function:''' Air Chamber 2 acts as the second half of the air chamber.  The part provides a force on the dart, aiding in applying additional energy to the foam dart.  The Internal Air Shaft Spring surrounds the second air chamber.  When the Cocking Bolt is pulled back and the spring is loaded, the second air chamber is also pulled back.  When the trigger is pulled Air Chamber 2 forces air through the Air Chamber 1 which then forces the foam dart to move.  This component aids in the transfer of kinetic energy from the spring-piston system to the foam dart.  Air Chamber 1 is located inside the Base of the Nerf gun.  The user does not directly interact with the chamber; therefore, the chambers environment is located inside the base of the gun.
 ::'''Component Form: '''The general shape of the second air chamber is a cylindrical tube with one end open and the other closed.  The part has an axis of symmetry and is primarily three-dimensional with the following dimensions:
 :::Length: 9.7 cm
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 :::Mass: 5.0 g
 ::Because one end of the cylindrical tube is closed, the air is allowed to be forced into the chamber and thus into Air Chamber 1 which then causes the dart to move.  The cylindrical shape is also important because it must cover Air Chamber 1.  The material of Air Chamber 2 also plays a role in the components function.  The chamber is made of a plastic material.  Plastic is a strong and durable material that can handle the air pressure inside the chamber.  It is also an inexpensive material that can be used to mass produce this product and keep the price of the product affordable for consumers. The air chamber is not seen by the consumer; therefore, aesthetics did not play a large role in the design of this component. The color of the chamber is bright orange, which follows with the color scheme of the Nerf brand.  Air Chamber 2 has a smooth surface finish and is also layered with grease on the outside and the inside of the chamber.  This decreases the friction between Air Chamber 1 and the Internal Air Shaft Spring as well as between Air Chamber 1 and Air Chamber 2.
-::'''Manufacturing Methods:''' Only one manufacturing method, injection molding, was used in the making of Air Chamber 2.  Molten plastic was forced into a mold to create this component.  Riser marks as well as parting lines can be found on the part, as shown in the Air Chamber 2 Parting Line photo, which is a main characteristic of injection molding.  The material of the part is plastic which is also used for the injection molding process. Injection molding is good for small to medium sized parts and creates a fine surface finish; therefore, injection molding was used to create the chamber which is a small sized part with a smooth finish. When considering the application of this manufacturing process, an economic factor that influenced this selection is that injection molding is economical for larger runs.  Also, plastic can be melted down and reused in this process, almost eliminating its negative effect on the environment.  This process also produces parts that are in good detail as well as achieve a fine surface finish, which as a societal concern is a good quality part.  When global factors are considered, this process is the ideal choice because there is a large availability of steel to be used.
+::'''Manufacturing Methods:''' Only one manufacturing method, injection molding, was used in the making of Air Chamber 2.  Molten plastic was forced into a mold to create this component.  Riser marks as well as parting lines can be found on the part, as shown in the Air Chamber 2 Parting Line photo, which is a main characteristic of injection molding.  The material of the part is plastic which is also used for the injection molding process. Injection molding is good for small to medium sized parts and creates a fine surface finish; therefore, injection molding was used to create the chamber which is a small sized part with a smooth finish. When considering the application of this manufacturing process, an economic factor that influenced this selection is that injection molding is economical for larger runs.  Also, plastic can be melted down and reused in this process, almost eliminating its negative effect on the environment.  This process also produces parts that are in good detail as well as achieve a fine surface finish, which as a societal concern is a good quality part.
 [[File:Gg5.png|center|caption|thumb|Air Chamber 2 Parting Line: The parting line illustrates the use of the injection molding process.|250px]]
 ::'''Component Complexity:''' The function complexity of Air Chamber 2 is given a rating of 3 because of the complex function of aiding in the energy flow of the system.  The air chamber forces air through the first chamber thus forcing the foam dart to move.  The geometric complexity of the air chamber can be given a rating of 3 because many complex features, such as extrusions, cut outs, filets, and mirroring are found on the part.  The component is only made of one material; therefore, the material complexity of the component is given a rating of 1.  Finally, because only injection molding is used in the manufacturing of the component, the manufacturing method complexity is given a rating of 1. The interaction complexity for this component is given a rating of 2. This component corresponds to multiple functions; it acts as a chamber of air which converts to a force on the dart and it applies a force on the spring before release.