FORUM

Welcome to our forum. A Message To Our New and Prospective Members . Check out our Forum Rules. Lets keep this forum an enjoyable place to visit.

Please feel free to share. “Amazing Grace”

A A A
Avatar
Please consider registering
guest
sp_LogInOut Log In sp_Registration Register
Register | Lost password?
Advanced Search
Forum Scope




Match



Forum Options



Minimum search word length is 3 characters - maximum search word length is 84 characters
sp_Feed Topic RSS sp_TopicIcon
DIY Replicating the L. Cocker Split Bamboo Violin Rod
Topic Rating: 0 Topic Rating: 0 Topic Rating: 0 Topic Rating: 0 Topic Rating: 0 Topic Rating: 0 (0 votes) 
Avatar
Irv
Members

Regulars
October 7, 2018 - 3:34 pm
Member Since: December 23, 2017
Forum Posts: 1432
sp_UserOfflineSmall Offline

Hi all.  I am rounding up supplies and speed reading books on making fly rods so I thought it time to start this thread.

I discovered that L. Cocker invested in British Patent 903574 and, with the help of AndrewH, downloaded the description and illustrations of same.  I had previously known that scarf joints were used to add a tip and butt to the bamboo stick, but did not know the reason for the grafted butt.  It looks to me that Cocker used the conventional six segment construction for split bamboo fly rods with each segment forming an equilateral triangle of half the thickness of the stick, and scarfed an eight sided wood butt end to utilize a conventional violin frog.  

I did find and order a router bit that would provide two sides of the 60 degree triangle (Amana Tool #49730), and will use this method as a backup.  I think that I can make an eight sided stick using a technique found in “Making Strip-Built Fly Rods from Various Woods” by John Betts.  This will save the effort of a scarf joint.  I also plan to use his method of scarf jointing the tip.

My next step in the process is to make a segment binder similar to the Bellinger Bamboo Segment Bonder (suggest watching YouTube Video, which is fascinating).  Once glued, the bamboo is secured with string in two directions to cancel torque moments.

I will also need to make an adjustable segment form so that I can provide the necessary contour of each segment as required for the strength and flexibility of the completed stick.048B83CE-3B4A-4CD2-8760-C187FE4DDC64.jpegImage Enlarger

Man has no special rights because he belongs to a particular race.  The soul emanates equal and eternal from bodies different in shape and color.  It is sufficient to say ‘Man’ to comprehend therein all rights.                                                    — Jose Marti 

Without deviation from the norm, progress is not possible.         —Frank Zappa

Avatar
Irv
Members

Regulars
October 7, 2018 - 5:19 pm
Member Since: December 23, 2017
Forum Posts: 1432
sp_UserOfflineSmall Offline

Also in the patent is a facility to place weights in central cavities as required.  No mention of what type of weight to use.  I think that lead would tend to dampen vibration.  Segments of Tungsten TIG welding electrode may be perfect for this application, available in a variety of diameters, and are inexpensive.

Man has no special rights because he belongs to a particular race.  The soul emanates equal and eternal from bodies different in shape and color.  It is sufficient to say ‘Man’ to comprehend therein all rights.                                                    — Jose Marti 

Without deviation from the norm, progress is not possible.         —Frank Zappa

Avatar
Fiddlerman
Fort Lauderdale
October 8, 2018 - 1:12 pm
Member Since: September 26, 2010
Forum Posts: 15063

Interesting Irv. Keep us posted. 

"The richest person is not the one who has the most,
but the one who needs the least."

Forum Timezone: America/New_York
Most Users Ever Online: 696
Currently Online: AndrewH, JohnBAngel
Guest(s) 73
Currently Browsing this Page:
1 Guest(s)
Members Birthdays
sp_BirthdayIcon
Today goettjp
Upcoming HP, UtahRoadbase, Briant, wendym, ElisaDalViolin, Faith, Raven, joko_emm
Top Posters:
Mad_Wed: 2849
Barry: 2679
Fiddlestix: 2647
Oliver: 2439
DanielB: 2379
Kevin M.: 1971
damfino: 1949
cdennyb: 1815
TerryT: 1728
Ferret: 1575
Member Stats:
Guest Posters: 3
Members: 27235
Moderators: 0
Admins: 7
Forum Stats:
Groups: 16
Forums: 56
Topics: 8428
Posts: 104721
Newest Members:
agnesviolin, AJ Rhino, ingridviola, JohnBAngel, dezzieraye, Ilona
Administrators: Fiddlerman: 15063, KindaScratchy: 1754, coolpinkone: 4176, BillyG: 3337, MrsFiddlerman: 2, Jimmie Bjorling: 0, cid: 1899