Thank you all for your input, this information is all very useful. I think I have a plan...
So, going by the dimensions of a standard 4/4 cello, my vibrational length would be about 23.5". It seems my best bet is to maximize the overtones of the drone strings by having 1/12 of the total vibrational length between the bridge and the center line of the wheel (for 23.5" that would be about 1.96") this should, in theory, give me the first 6 harmonics of the string? I guess I would want that fraction to be a little less for the melody strings so that I get the most overtones I can as the tangents shorten the length. Im using an online fret- calculator for my tangent positions. As for the wheel itself, It seems an 8" x 1" wheel would be somewhat properly scaled to my new dimensions? I need to do some more research before I start making the wheel. I'm new to working with wood, I mostly work with metal for my job so for ease I had planned on turning the wheel out of a solid piece of walnut of preferably bigleaf maple (as suggested by the Hackmann's website) can anybody suggest any good wood alternatives? Am I making a serious error by not using layers of laminate (maybe laminate is not the right term to use) wood for the rim? I understand that some expansion will occur along the grain but I am clueless as to how to laminate a wheel. Thanks again for all your help. On Jan 20, 3:25 pm, Graham Whyte <[email protected]> wrote: > The vibrating length is varies depending on which key is pressed > The part of the string on the peg/nut side of the depressed tangent does > not vibrate > Because the bridge to wheel distance is fixed, HG players cannot > compensate for this as different keys are pressed > Guitar and bowed instrument players can and do compensate > In the 19th century Nicolas Colson made 2 styles of HGs with wheels > closer and further away from the bridge > Chris Allen has historic examples of both styles > My own Colson has the wider spacing and is so rich and sweet > > Graham > > Anthony Shostak wrote: > > George Leverett-Altarwind Hurdy Gurdies wrote: > >> By increasing the distance between the wheel & bridge, you might gain > >> a little in resonance (most noticeable in lower midrange frequencies > >> to my ears), but then the arc of vibration of the strings increases > >> too, and you may have issues of chatter against the tangents. > > Really? It seems to me that so long as the scale length remains the > > same, the distance from wheel to bridge should not make effect the > > viibrational arc, because the scale length is determined by the > > distance from bridge to saddle. Otherwise, the pitch of a violin > > would be different when bowing close to bridge than when bowing closer > > to the fingerboard. No? > > > Anthony
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