[bobgengeskahn]

I have been spending a lot of time brainstorming recently, as it looks like many of us have been.

One thing that I keep going back and forth on is the idea of how the BB should be loaded into the "chamber" and I just wanted to see if anyone around here has any first hand experience with classic airsoft.

For those of you that don't know, classic airsoft rifles loaded themselves with a spring loaded 'shuttle' that would move to the rear to pick up a BB, once the shuttle picked up a BB, the BB would be pushed against an O-ring or a soft nozzle at the front of the shuttle creating a seal and the constant air flow would push the shuttle forward, pushing the BB against the seal that was created until the pressure built enough to push the BB through.

I am wondering how reliable this method is and how inherently accurate (or inaccurate) it is.

The reason that this interests me is that with HPA/CO2 rigs, it has been proven that to create an efficient system both for FPS and for conservation of gas, the system has to have 2 characteristics.
1. Minimal dead space (space between the source and the projectile)
2. Maximum flow.

The classic system is ideal for this because it allows pressure to build up before firing the BB, this executes both of the above characteristics.

Think about if you had a blow gun. If you were to shoot the blow gun as one normally would, that is, take a deep breath and fire by releasing as quickly as possible and prolonging the exhale as long as possible, you would get a predictably powerful effect. If you were to fire it by slowly exhaling and increasing to maximum effort and then decreasing to a slow exhale you would lose range and accuracy. I would like to see if this would apply in theory to airsoft as well.

 

[bobgengeskahn]

IMO gas is the way to go; not not the way that they have been doing it... again IMHO.

I don't think that flaring the nozzle or the barrel will get the same effect. The idea is basically creating a re-usable burst disc valve, with the BB as the burst disc that would ideally be able to be controlled via a triggering mechanism. Ideally you would be able to bring all of the air to full pressure behind the BB before even pulling the trigger; but any build up of pressure would theoretically increase performance.

 

[bobgengeskahn]

Anything happening here? any new ideas.

I have never seen classic airsoft as you mention, if you have a schematic can you post it?

I have been focusing more on BB design for the time being, trying to take the whole thing down to the root.

But hopefully these links will help you figure out how Classics work, even with these links, it took me forever to really 'get it' and talking to a lot of people about it too:
Animation of general concept:
http://classicairsoft.org/images/BV.htm

This is one of the better breakdowns that I have found on the internals to a classic gun:
http://www.classicairsoft.org/images/JACm16A2Limited/index.htm

Here is another thread with some good links to pics.
http://www.airsoft-barracks.com/forums/index.php?showtopic=23774

Labeled diagram:

There are two common gas systems, one feeds through the mag, here is a picture of that one:

Finally here is a classic forum if you feel like poking around:
http://classicairsoft.org/forum/forum.php

@Awagg:
Can you possibly make a paint drawing of what you are talking about? For some reason I am not able to picture it in my mind (too many BBs rolling around

) Because it sounds very interesting...