For interest, I've just put up a youtube of a gurdy just strung up yesterday which has a 5" wheel. I find it no more difficult to trompette with than the 7.5" wheel on my 3 chanter gurdies. It's my opinion that the buzz is caused solely by the relative % acceleration which is not affected by wheel size. http://www.youtube.com/watch?v=3d3xrj57HyM
Regards Neil On Nov 7, 7:37 pm, Kazimierz Verkmastare <[email protected]> wrote: > Not claiming to be an expert or to even be doing things anywhere close to > right (that is why I am so interested in this thread, I'm learning too), but > for the few wheels I have made, I mount the hub in a rough-cut baltic birch > blank, then use a model airplane propeller balancer to adjust flutter or > run-out using thin aluminum foil shims between the flange and the wheel (how > perpendicular the faces of the wheel are to the shaft, not how true the > diameter is.) > > > > Then once it is true, I mount a shaft in the metal lathe chuck, and with a > specially ground tool in the toolpost, I true the rim and take it to final > diameter, then lightly bevel the edges. Once done like this, there is little > except a cursory truing that I have to do in the instrument. > > > > But I could do it the more traditional way, and would do so if the wheel > diameter was set at 7 inch, as my atlas 6 inch lathe won't throw a 7 inch > wheel (but my neighbor's 8 inch Atlas will - might have to borrow his for a > few minutes) > > > > But truing in place is always the final step, no matter how you get the wheel > made. > > > > Chris > > > Would you make the wheel on a metal lathe? I would think you could > > > use a metal lathe for some of the smaller-diameter parts and make > > > the wheel on a wood lathe. In the absense of a wood lathe, you > > > could even cut the rough shape of the wheel on a band saw with some > > > further shaping by mounting it on a drill press. The final truing, > > > of course, would be in-place with a scraper. > > > > > > Stan > > > > > > > > > On Mon, Nov 7, 2011 at 9:57 AM, Kazimierz Verkmastare > > > <[email protected]> wrote: > > > > > >> Since the most common hobby metal lathe is an Altas 6 inch or one > > >> of the clones, there is compelling reason to consider parts that > > >> can be made on this lathe, if there is no acoustic or performance > > >> reason not to. Remember, this is not a thread to see what kind > > >> of a compromise gurdy we can build, it is to see if a truly > > >> reasonable instrument can be built, at or below the cost of a > > >> professionally built instrument, but an average craftsman. > > >> > > >> > > > I have no specific knowledge of anything that would make a 6 inch > > > wheel better or worse than a 7, so I will ask the builders and > > > players if they can give a reason to stay with 7 inch or can agree > > > on the 6 inch (152 mm) instead. > > > > > >> > > > Chris > > > > > >> > > >> Just a thought , 7" is pretty much standard for lute backed > > >> instruments but it's worth considering a smaller wheel - say 6" > > >> which is more the norm for Guitar bodied gurdies. The smaller > > >> wheel makes no difference to articulation of trompette ( imho ) . > > >> The slower rim speed helps to minimise the unpleasant resonances > > >> that can occur and the overall volume is slightly less. A 6" > > >> wheel may also be a more practical size for those with only > > >> access to a small lathe. I use an average of 16mm for rim width > > >> and 18mm rim to bridge.Regards Neil > > >> On 7 Nov 2011, at 07:24, [email protected] wrote: > > >> > > >>> > > >>> Today's Topic Summary > > >>> > > >>> > > >>> Group:http://groups.google.com/group/hurdygurdy/topics > > >>> > > >> - ***Builder HG*** Current 'Builder HG' specifications [7 > > >> Updates] - Brocker translation is now available online [2 > > >> Updates] - *** Builder HG*** specification responses [1 Update] > > >>> > > >>> > > >>> ***Builder HG*** Current 'Builder HG' specifications > > >>> > > >>> > > >>> Kazimierz Verkmastare <[email protected]> Nov 06 09:21AM -0600 > > >>> > > >>> > > >> So I am going to start this new thread, called 'current builder > > >> HG specifications. Please do not respond to this thread - > > >> responses should be to the thread 'specification responses' > > >> previously > > >> > > >>> ...more > > >>> > > >>> > > >>> Arle Lommel <[email protected]> Nov 06 12:45PM -0900 > > >>> > > >>> > > >> I would suggest making all measurements in metric, and setting > > >> the default wheel size at 178 mm, for the reasons listed below: > > >> > > >> Alden's size (7" = 177.8 mm) is normal for western instruments, > > >> which > > >> > > >>> ...more > > >>> > > >>> > > >>> Alden and Cali <[email protected]> Nov 06 02:20PM -0800 > > >>> > > >>> > > >> I agree - specs should be metric whenever possible. > > >> > > >> We end up using metric, fractional inches, and decimal inches in > > >> the shop, because our various tooling demands different things. > > >> I'd be > > >> > > >>> ...more > > >>> > > >>> > > >>> Scott Gayman <[email protected]> Nov 06 04:32PM -0800 > > >>> > > >>> > > >> Hello Chris, > > >> > > >> If you are basing it around a non-trompette sinphone then it > > >> could have a smaller wheel. The standard concensus regarding > > >> wheel diameter is that larger wheels make for better control > > >> > > >>> ...more > > >>> > > >>> > > >>> Kazimierz Verkmastare <[email protected]> Nov 06 06:59PM -0600 > > >>> > > >>> > > >> I thought we were going for an instrument with 2 chanterelle, a > > >> petit bourdon, a gros bourdon, and a chein. This would give the > > >> opportunity to design around and learn how to set up pretty much > > >> every > > >> > > >>> ...more > > >>> > > >>> > > >>> Kazimierz Verkmastare <[email protected]> Nov 06 07:02PM -0600 > > >>> > > >>> > > >> I agree, metric (I will convert to US as necessary to use my > > >> tools) should be the standard. > > >> > > >> Now I need to go out and get a couple decent metric straightedges > > >> (and metric pencil lead - 0.7mm for my > > >> > > >>> ...more > > >>> > > >>> > > >>> Kazimierz Verkmastare <[email protected]> Nov 06 07:07PM -0600 > > >>> > > >>> > > >> OK, to go with the wheel diameter (enough for coup control, not > > >> so much as to eliminate the possibility of some of the faster > > >> central European based music) what about rim width. Is a perimeter > > >> > > >>> ...more > > >>> > > >>> > > >>> Brocker translation is now available online > > >>> > > >>> > > >>> timw <[email protected]> Nov 06 06:01AM -0800 > > >>> > > >>> > > >> Thank you both! > > >> > > >> This is really appreciated, and I know it took a lot of work for > > >> everyone involved. Thanks for adding this information to the > > >> group. Tim > > >> > > >>> ...more > > >>> > > >>> > > >>> Ulrich Joosten <[email protected]> Nov 06 08:01PM +0100 > > >>> > > >>> > > >> Dear all involved people, > > >> > > >> thank you for this great treat. It was long overdue that this > > >> standard work is now available in English language. Really big > > >> kudos for this big effort to all involved > > >> > > >>> ...more > > >>> > > >>> > > >>> ***Builder HG*** specification responses > > >>> > > >>> > > >>> Kazimierz Verkmastare <[email protected]> Nov 06 09:21AM -0600 > > >>> > > >>> > > >> In order to keep track of everything we are discussing, I propose > > >> we keep 3 threads alive on the builder topic. > > >> > > >> The first set of threads should have ***Builder HG*** > > >> Specifications for proposed > > >> > > >>> ...more > > >>> > > >>> > > >> You received this message because you are subscribed to the > > >> Google Group hurdygurdy. You can post via email. > > >> To unsubscribe from this group, send an empty message. For more > > >> options, visit this group. > > >> > > >> > > >>> -- > > >> You received this message because you are subscribed to the > > >> Google Groups "hurdygurdy" group. > > >> To post to this group, send email to [email protected] > > >> To unsubscribe from this group, send email to > > >> [email protected] For more options, visit > > >> this group athttp://groups.google.com/group/hurdygurdy The > > >> rules of posting, courtesy, and other list information may be > > >> found athttp://hurdygurdy.com/mailinglist/index.htm. To reduce > > >> spam, posts from new subscribers are held pending approval by the > > >> webmaster. > > >>> > > >>> > > >> Best regards > > >> > > >> > > >> Neil Brook > > >> > > >> > > >> [email protected] > > > > > > > > >> -- > > >> You received this message because you are subscribed to the > > >> Google Groups "hurdygurdy" group. > > >> To post to this group, send email to [email protected] > > >> > > > To unsubscribe from this group, send email to > > >> [email protected] > > >> For more options, visit this group at > > >>http://groups.google.com/group/hurdygurdy > > >> > > >> The rules of posting, courtesy, and other list information may be > > >> found athttp://hurdygurdy.com/mailinglist/index.htm. To reduce > > >> spam, posts from new subscribers are held pending approval by the > > >> webmaster. -- You received this message because you are subscribed to the Google Groups "hurdygurdy" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/hurdygurdy The rules of posting, courtesy, and other list information may be found at http://hurdygurdy.com/mailinglist/index.htm. To reduce spam, posts from new subscribers are held pending approval by the webmaster.
