Official Luthiers Forum!

Owned and operated by Lance Kragenbrink
It is currently Sun Nov 24, 2024 2:18 am


All times are UTC - 5 hours


Forum rules


Be nice, no cussin and enjoy!




Post new topic Reply to topic  [ 1 post ] 
Author Message
 Post subject: Engineering formulas
PostPosted: Thu Aug 05, 2021 5:03 pm 
Offline
Koa
Koa

Joined: Sat Mar 09, 2019 4:50 pm
Posts: 1251
Location: Goodrich, MI
First name: Ken
Last Name: Nagy
City: Goodrich
State: MI
Focus: Build
Status: Amateur
I used the 7 pounds, 18" spacing, .25" movement to get the Stauffer belly in the right starting point. I just used, 7 pounds, 12" spacing , 1.0" movement to get a baroque in A/ukulele belly in the right starting point. The Stauffer might have been 2.5mm, I don't remember. The uke should be 1.8; it's 2 now, and moves .75" .

If the small one should be about 2.7 times less stiff, using the thickness; why does it seem to move 6 times more?

If the back on the baroque in E that is 5 thirds bigger is around 4.5 thick; how thick would the one in A be? Using the numbers from the belly, and 10.8" long ( the belly has a extension on the neck) I get 3.2" but I don't know why.

It is just a reflective back for strength, and has no bracing,and is less than a foot long, and 6 inches wide, so stiffness comes fast.

_________________
Why be normal?


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 1 post ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: TimAllen and 29 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group
phpBB customization services by 2by2host.com