Woah, it doesn't take long to come up with a list of agenda items that might well exceed my remaining life expectancy! But treat it like a wish list and see what I've forgotton or what can be ruled out as patently unnecessary.
Concertina pressure and airflow tests
Determine standardised test pressure (250mm, 10" water?)
Determine typical playing pressure
Determine minimum operating pressure
External leakage paths
Devise ways to test leakage to outside the concertina through these paths:
around bellows (i.e. through gasket seals)
through or around pads
Determine effect on leakage through leather when stretched
Determine typical leakage values for above
Determine threshold leakage values for above.
Devise informal ways to test above, and correlate with formal tests.
Correlate overall leakage rates with players' perceptions.
Investigate alternative materials for gasket applications, e.g. chamois, leather, closed cell foam, other?
Relationship of clamping pressure to sealing ability
Compare results of spring clamping and screw clamping to determine typical screw-clamping pressures employed.
Capacity of various materials to accommodate irritants of varying thickness. (Sorry about the pea, Princess, but we had to be sure...)
Determine by how much does roughing up the surface of chamois improve the seal?
Does gluing gasket material down reduce its ability to accommodate movement? Are there "better" glues?
Does doping have anything to offer? Neatsfoot oil, Dubbin, silicone rubber, other?
Consider methodologies for investigating Intra-chamber leakages
Determine relationship between pad leakage and applied spring pressure
Determine influence of pad plate surface and surface treatments on leakage
Determine relationship between pad leakage and the polarity and magnitude of applied air pressure
Determine (for large, medium and small reeds):
typical operating pressure and airflow
minimum operating pressure and airflow
maximum operating pressure and airflow
reverse airflow (when used without valves)
starting characteristics vs applied pressures
Valve (leather) characteristics
Determine (for an average size and typical material)
minimum opening pressure
minimum closing pressure
closed airflow at playing and test pressures.
effect of adding a Mylar spring
effect of surface treatment to the reed pan timber
effect on starting characteristics of reeds
Are there other areas of the concertina overlooked?
Edited by Terry McGee, 30 April 2014 - 10:34 PM.