Quote from: mmclain on November 29, 2021, 10:27:59 PM
Just wondering. What brought that conclusion as a starting point.
That's a really good question. The short answer is it's based on an old Tree Yelper in my collection that has a really nice tone. Interestingly it's also extremely close to the Turpin plans/drawings of his Tree Yelper, so close so that it could almost be the same specs except the wingbone itself is longer in the Turpin drawing if I remember correctly. As a career woodwind instrument builder who has been designing woodwind instruments for almost 3 decades I can say that a good starting place and some prototyping to improve and make it your own is easily obtainable with some work although this design works fine as is and is based on a proven call design. For those who like to experiment and who understand pitch variations in bore design and how to alter it to get the pitch, tone, and volume your after, sky is the limit. Those that know me will tell you I'm always changing and experimenting with instrument designs, almost obsessively at times to perfect a design. So much can be done with simply changing bore sizes, taper rate, back pressures, and adjusting lengths. This call could be made several different ways/bores with all tuning at or around the same hertz which for most air calls seems to be around F#5 to G5 @ A-440hz. This design works just fine but experimenting and making it your own is always recommended. Probably more of an explanation than you were after.
Seth
