Talk:Airsoft gun

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Revision as of 16:08, 28 September 2007

We received your report, and you have some interesting results. Typically we expect more findings and conclusions to be summarized in the executive summary - we need clear conclusions to work with, and it is difficult to dig for them. Overall, the detailed documentation of components is impressive, although it would be helpful to have more professional documentation introducing each section and helping the report to flow. Detailed comments follow:

• One major customer need is to emulate an actual gun - which attributes are important in this regard?
• The description of functionality is quite clear, but it would help to include a figure with labeled components
• You mention child users - please discuss this further and address safety issues.
• Stakeholders - you mentioned crime as an issue, does this imply additional stakeholders?
• Nice bill of materials, but you do not show how all of these parts fit together, other than the trigger assembly. It is not obvious just from the list.
• It is difficult to tell from the pictures, but you might reconsider that some parts that have constant thickness but a bent shape may be produced through forging / stamping / bending rather than casting.
• The manufacturing term for “lathing” is turning
• Reaming may be necessary for the barrel - you might consider
• Please provide an introduction to each section rather than beginning with a table of data.
• You mention in the FMEA that one of the most likely failure modes is fatigue of the spring from users storing the gun cocked. A users manual warning is okay, but we know from experience that this will not do the trick for most users. Is there another way to avoid this failure mode?
• LCA - you did not discuss major sources of GHG, pollutants, dominant life cycle phase, etc. Should we be worried more about manufacturing of the gun or of the BBs?
• DFMA is a nice list, but more detail and supporting information would be helpful
• Can you justify why the trigger mechanism is so complex? It appears that the same function could be performed with a single spring, since the only output is to move the lever out of the way of the piston release.
• In your calculations it looks like you measured spring constants by attaching known weights and measuring deflection? Please explain what you are doing, otherwise we cannot follow where the equations and numbers are coming from.
• Your final result is that the force required to pull the trigger is 2.5 N based on experiment, but your calculations seem to show 1.72. Please explain the discrepancy. Also, what does this result tell us? Is this force too high? Just right?