
Cleaning out the saliva is not the issue it’s the short time it takes to effect the sound, and you would not be able to play one tune without having to stop and empty it.
Hm.
In part I still think this must be a function of how much spit you’re pushing through the windway. Of course, the other factor at play here is how narrow / thin the windway itself is! Naturally, a windway with less cross-sectional area will clog faster than one with more area. Basic physics that. Or jommetry or somesuch.
Would be ideal if it could get the chance to try a better quality one which I will try and do just to see if it makes any difference.
My opinion only here, and as I said before, I don’t know anything about these whistles – but it does irk me just a tadge that you’re going on about instrument quality. Unless the craftsman is here to discuss & defend his design parameters, materials, workmanship, etc., I just think this is a bit of a dead-end. I think you’ll find that el-cheapo whistles often have less clogging problems than big name / high quality / expensive ones!
From my own experience, I can say that quality of instrument is definitely nòt the deciding factor here. I have right here in front of me three low whistles, none of which can be called low quality, as all seem to earn high marks from the Board of Assessors of the Chiff and Fipple Quality Assurance Bureau. In my experience, and given the amount of spit I can push through an instrument, the Overton (Bernard) clogs relatively easily for me – but then again, it is a bloody aluminium cannon and does need to be warmed up quite a bit. I’m sure condensation is an issue there. I haven’t had similar spit accumulation issues with either Copeland or Shaw. Perhaps more telling is the vast difference in windway cross-section. It looks like the Copeland windway is (apart from being curved, unlike the other two) about twice the height of the Overton and the Shaw is about thrice the height. v = l * w * h, so for the Shaw, that’s a lot of volume to push spit through before it starts clogging.
If you have a mm ruler, or a micrometer, could you measure the cross-section of the windway (height as well as width)? We could at least compare relative sizes and perhaps determine if that is at issue. Then one solution might be to look for an instrument with a larger windway, if you can’t alter the windway of your own whistle. In all honesty, spit is something we can’t really control all that well, and it may well be that the na Gruen just isn’t a good match for you if it has a small windway, just as I don’t think the Overton is a good match for me (though not just for the clogging issue).
One other possibility: I do believe there is one (or more) whistles making the tour rounds of any Chiffer that wants to host it for a time and give it a try – if it’s a low whistle, maybe you could get on the list and give it a try? That might make for a good comparison!
Cheers