alex_holden Posted December 31, 2014 Share Posted December 31, 2014 Just idly pondering... Has anyone ever made a concertina with a number of sides other than 4, 6, 8 or 12? I don't suppose a triangular instrument would be much use (!), but I wonder if there might be any advantage to, e.g. a nonagonal instrument. Link to comment Share on other sites More sharing options...
Geoff Wooff Posted December 31, 2014 Share Posted December 31, 2014 The Dipper's have made instruments with odd numbers of sides... but I cannot remember exactly , 5 or 7 sides I think.... Link to comment Share on other sites More sharing options...
Jake Middleton-Metcalfe Posted December 31, 2014 Share Posted December 31, 2014 This isnt an instrument with an odd number of sides but it is an oddity: http://www.concertina.info/tina.faq/images/haydp.htm its a 10 sided concertina made by the Dippers Link to comment Share on other sites More sharing options...
Geoff Wooff Posted December 31, 2014 Share Posted December 31, 2014 This isnt an instrument with an odd number of sides but it is an oddity: http://www.concertina.info/tina.faq/images/haydp.htm its a 10 sided concertina made by the Dippers cannot get your link to work Jake. Hmm, perhaps my memory of 'odd numbers' is more likely ' unusual numbers' ? Link to comment Share on other sites More sharing options...
JimLucas Posted December 31, 2014 Share Posted December 31, 2014 This isnt an instrument with an odd number of sides but it is an oddity: http://www.concertina.info/tina.faq/images/haydp.htm its a 10 sided concertina made by the Dippers Jake, you've somehow managed to get a "space" character appended to the end of the URL in your link, which makes it impossible to load, even though it "looks" right. This one should work, though: http://www.concertina.info/tina.faq/images/haydp.htm Beautiful instrument! But then, I've never seen a Dipper that wasn't beautiful. Link to comment Share on other sites More sharing options...
JimLucas Posted December 31, 2014 Share Posted December 31, 2014 (edited) Just idly pondering... Has anyone ever made a concertina with a number of sides other than 4, 6, 8 or 12? I don't suppose a triangular instrument would be much use (!), but I wonder if there might be any advantage to, e.g. a nonagonal instrument. I believe both the 7- and 10-sided concertinas have been mentioned before in these Forums. And we mustn't forget the few (one batch?) round ones from Lachenal. If we include German-made concertinas, though, there seem to be few restrictions. I'm pretty sure I've seen both 5- and 9-sided examples on eBay, as well as a number with ends that weren't simple polygons. Note: As has been discussed in the past, the more sides the ends have (the closer to round), the easier it will be for it to roll off of a table, etc. and smash into the floor or whatever else is below. Edited December 31, 2014 by JimLucas Link to comment Share on other sites More sharing options...
inventor Posted December 31, 2014 Share Posted December 31, 2014 Colin Dipper and Robin Scard have made several instruments with 10 sides including at least 3 Hayden Duets that I have seen. Inventor. Link to comment Share on other sites More sharing options...
Geoffrey Crabb Posted December 31, 2014 Share Posted December 31, 2014 Not irregular but I believe unique Geoffrey Happy New Year to all. Link to comment Share on other sites More sharing options...
Geoff Wooff Posted December 31, 2014 Share Posted December 31, 2014 (edited) Colin Dipper and Robin Scard have made several instruments with 10 sides including at least 3 Hayden Duets that I have seen. Inventor. As I like to turn my octagonal Hayden one 'flat' forward of horizontal, which, for me, helps with fingering of the upper rows by my little fingers, I am sure I would enjoy a 10 sided model, perhaps even more, as having the hand rails at 45° to vertical is a wee bit too much angle. Anyone wishing to sell one of these Dipper( or Scard) Haydens can feel free to contact me . Edited December 31, 2014 by Geoff Wooff Link to comment Share on other sites More sharing options...
gloscon Posted December 31, 2014 Share Posted December 31, 2014 A NONAGONAL shape always seemed to make sense to me. With 360 degrees 8 sides does not result in a whole number. But nine would. Nine sided shapes have always fascinated me, but they are rarely to be found even in the normal world. Only two that I can recall finding. One in a urinal drain and the other in a chandelier at university I must stop, or you will think that I am as odd as a nine sided concertina. The shape just doesn't seem to look comfortable, somehow. Let me know if you ever find any. Les Link to comment Share on other sites More sharing options...
alex_holden Posted December 31, 2014 Author Share Posted December 31, 2014 Not irregular but I believe unique G Crabb 16 side 58 button Crane Duet.jpg Geoffrey Happy New Year to all. Very impressive instrument, Geoff. Happy new year to you too! Link to comment Share on other sites More sharing options...
alex_holden Posted December 31, 2014 Author Share Posted December 31, 2014 This isnt an instrument with an odd number of sides but it is an oddity: http://www.concertina.info/tina.faq/images/haydp.htm its a 10 sided concertina made by the Dippers Jake, you've somehow managed to get a "space" character appended to the end of the URL in your link, which makes it impossible to load, even though it "looks" right. This one should work, though: http://www.concertina.info/tina.faq/images/haydp.htm Beautiful instrument! But then, I've never seen a Dipper that wasn't beautiful. Indeed, Dipper's instruments are inspirational. Link to comment Share on other sites More sharing options...
alex_holden Posted December 31, 2014 Author Share Posted December 31, 2014 A NONAGONAL shape always seemed to make sense to me. With 360 degrees 8 sides does not result in a whole number. But nine would. Nine sided shapes have always fascinated me, but they are rarely to be found even in the normal world. Only two that I can recall finding. One in a urinal drain and the other in a chandelier at university I must stop, or you will think that I am as odd as a nine sided concertina. The shape just doesn't seem to look comfortable, somehow. Let me know if you ever find any. Les It's a strangely satisfying shape to me, perhaps because it has three threes of sides. Link to comment Share on other sites More sharing options...
MatthewVanitas Posted December 31, 2014 Share Posted December 31, 2014 Posting a pic of a nonagon so that not everyone has to google it individually: Anyone clever with Photoshop want to work some magic to twist an existing concertina photo into this shape? Link to comment Share on other sites More sharing options...
maki Posted January 1, 2015 Share Posted January 1, 2015 (edited) nevermind me Edited January 8, 2015 by maki Link to comment Share on other sites More sharing options...
Tradewinds Ted Posted January 1, 2015 Share Posted January 1, 2015 (edited) Except that 360 degrees divided over eight sides, does yield a whole number, 45 degrees. Yes, 360 degrees divided over nine sides yields 40 degrees, which is great when looked at digitally, but difficult to construct geometrically because it is messy in radians. That 45 degrees is a very neat Pi/4 radians, but 40 degrees is a tricky 2Pi/9 radians. What that means in practical carpentry terms is you have to divide a circle into thirds, and then divide into thirds again, which gets a bit messy. but 45 degrees is easy to do by simply dividing in half twice, and the 60 degrees of a hexagon is also easy to do, as the sides are the same length at the radius of the circle. So a Nonagon is a pain to build, although I expect such an instrument would look very nice once completed by a skilled craftsman. Personally, I'm intrigued with seven sides, but that would be even harder to create geometrically, and is a mess digitally as well. It would be a step farther from the danger of rolling away than nine sides of course, but then again the good old hexagon has both of them beat on that score. Edited January 1, 2015 by Tradewinds Ted Link to comment Share on other sites More sharing options...
alex_holden Posted January 1, 2015 Author Share Posted January 1, 2015 Except that 360 degrees divided over eight sides, does yield a whole number, 45 degrees. Yes, 360 degrees divided over nine sides yields 40 degrees, which is great when looked at digitally, but difficult to construct geometrically because it is messy in radians. That 45 degrees is a very neat Pi/4 radians, but 40 degrees is a tricky 2Pi/9 radians. What that means in practical carpentry terms is you have to divide a circle into thirds, and then divide into thirds again, which gets a bit messy. but 45 degrees is easy to do by simply dividing in half twice, and the 60 degrees of a hexagon is also easy to do, as the sides are the same length at the radius of the circle. So a Nonagon is a pain to build, although I expect such an instrument would look very nice once completed by a skilled craftsman. This would have been true when the vintage instruments were designed, but I don't think it's a big deal with CAD, CNC and a vernier protractor. Link to comment Share on other sites More sharing options...
alex_holden Posted January 1, 2015 Author Share Posted January 1, 2015 Posting a pic of a nonagon so that not everyone has to google it individually And here's a heptagon. Link to comment Share on other sites More sharing options...
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