I don't think that the nozzle has zero impact on the the output force of the air.
Example, if you have a syringe with the needle on, and you squeeze the piston, you will spray water across the room. Again the same syringe without a cap on the end would cause the water to splash on the floor.
I'm sure it has something to do with the compression factor and the ratio of the piston diameter to the area the the energy is actually applied to.
Ah well, maybe some MIT student that breaths physics will jump in on this thread and set is all right.
There are similar products that use both spring and compressed air for their power supply. Both have similar results. The compressed air one use a supply of 80-150psi or so, while the spring gun isn't using anything close to an 80 pound spring. |