@Elwin . Regarding bow requirements, oh, is that all? Your specifications caused my fevered brain to remember a thread here (currently residing on page 20) on the Rolland Spiccato Premiere bow that received a US Patent. It has a tensioning cable connecting both ends of the carbon fibre stick that can be adjusted via a supplied wrench inserted in the frog end. It is no longer manufactured (Benois Rolland moved on), but they often come up on the “four letter auction web site that cannot be mentioned but starts with e and ends in y.” I am sure that a search can develop other leads.
Success is the progressive realisation of a worthy ideal. —Earl Nightingale.
The only thing affected with a bow in humidity is the hair.
The stick will warp if you dont release the tension after use due to to the moisture in the hair.
I was told this by a luthier, so I tend to believe what he says.
Good to know. I am now leaning more towards a Carbon Fibre Bow, because I plan to eventually get a Glasser Acoustic-Electric Carbon Fibre viola, and my opinion is that aesthetically, a wood-bow with a Carbon Fibre instrument doesn't look good.
Dont know if this is any use to you John, I copied and pasted from the net as I know jack about bow lengths.
The following bow sizes correspond with the associated viola size: 4/4 bow should be purchased for a 15”-16.5” viola, a ¾ bow should be purchased for a 13”-14” viola, a ½ bow should be purchased for a 12” viola, and a ¼ bow should be purchased for an 11” viola.
Apparently full size for a normal adult male is 75 centimetres?
I think figuring out what you need in a bow can be fun and frustrating!
I believe having more weight in a Viola bow helps so you don't have to make as much effort to coax good sound from the C & G strings. Just remember, all the strings need to be played differently to get the best sound (I have a 5-string Violin). You'll probably notice the biggest difference between how you play the C string vs. your A, but even different brands of strings respond differently.
Your best option is to try a few different bows.
You can always contact the Fiddlershop and ask what they can do to let you try a few of their 'higher end' Viola bows.
You probably won't have the trouble I do with a heavier bow. I have also learned there is much more that goes into a good bow, than weight - and your needs may change as your playing progresses.
Here's the extent of everything I went thru to help me figure out what I need - with help from the forum members & FM's insight.
I like a lighter bow for faster manipulation and had to find I like a certain balance. I'm happy with what I am currently using. Was thinking I could benefit from a slightly stiffer bow for when I want to dig into the C string, because I have to be careful my hair tension is enough I don't bottom out.
... so, not completely done with my perfect bow quest, just yet.
Not trying to get off topic, but I know you followed this thread & was just curious - did anything help with bounciness?