It's his speciality. If ever you need a pneumatic device to make farting noises, JSR is your man, and you need look no further.psycix wrote:The farting machine works!
...actually, just get a whoopee cushion instead.
</larkingabout>
It's current cycle rate sounds like about 75 Hz, which will obviously need to come back a lot before it's useful. I imagine at the outside, you don't really want more than about a quarter of that.
However, unless I'm mistaken, more pressure will not change the cycle rate (noticeably). Amplitude does not affect resonant frequency.
It's like a tuning fork, which will always make the same note regardless of how hard you bash it - it'll just get louder (in this case, the amplitude represents hammer travel).
Obviously, this is more complex than basic resonance, but I suspect the only methods of changing the frequency noticeably are limited to a heavier hammer, adjusting the overall spring length or adding some form of damping.
Potentially, as the hammer is contained within a conductive brass tube, with a powerful Neodymium magnet for a piston (or as part of the piston), this could be magnetically damped - however, magnetic damping would take careful application, as magnetic damping is pretty strong, and it might be too much for a moderate spring. It could then be that the hammer then didn't hit the valve hard enough - obviously, this would prevent it cycling.
Possibility, but obviously eats energy (as that's what damping is supposed to do!) compared to a heavier piston - and is also somewhat at odds with your "araldite and lollypop sticks" approach. Perhaps better as a theory than practise.
8)
