***** Guitar Project Jigs, Tools & Techniques Online Resources Archives OLF Video Page Library of plans MP3 Library Inlay Class
Offical Luthiers Forum





And our community proudly sponsored by:

RC Tonewoods | Stewart MacDonald | LuthiersForum
TasmanianTonewoods | OLF | OLF MERCH
Luthier Suppliers | Pacific Coast Woods | ELEVATE
OLF X | Tasmanian Acoustic Tonewood | Luthiers Forum Store!
Luthiers Forum | OLF Facebook | AVAIL SPACE
OLF | Alaska Specialty Woods | A.Hix Tonewood
Duke of Pearl | Birkonium CNC | Space




Official Luthiers Forum!

Owned and operated by Lance Kragenbrink
It is currently Fri Nov 29, 2024 6:51 pm


Board index » Luthiers Forum Rooms » Guitar Building Forum

All times are UTC - 5 hours


Forum rules


Be nice, no cussin and enjoy!




Post new topic Reply to topic  Page 1 of 1
  [ 7 posts ] 
  Print view Previous topic | Next topic 
Author Message
banjopicks
 Post subject: SM HD28 Plan
PostPosted: Mon Jul 15, 2019 9:50 am 
Offline
Koa
Koa
User avatar

Joined: Tue Feb 26, 2008 6:19 am
Posts: 1560
First name: Richard
Last Name: Hutchings
City: Warwick
State: RI
Zip/Postal Code: 02889
Country: United States
Focus: Build
Status: Amateur
This is the plan I'm building to. Does anyone know if this is a forward shifted design? How can I tell?

_________________
Hutch

Get the heck off the couch and go build a guitar!!!!
Top
 Profile  
 
J De Rocher
 Post subject: Re: SM HD28 Plan
PostPosted: Mon Jul 15, 2019 9:57 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Mon Apr 16, 2012 12:47 pm
Posts: 2523
First name: Jay
Last Name: De Rocher
City: Bothell
State: Washington
When I was researching the design for my first dreadnought type guitar, I came across this figure:

Attachment:
Forward shifted vs standard x-bracing layout.jpg


The figure is from an article on StewMac's website: https://www.stewmac.com/How-To/Online_Resources/Learn_About_Building_Instruments_and_Kits/Banjo_Killer_The_scoop_on_forward_X_bracing_for_greater_guitar_volume_.html


You do not have the required permissions to view the files attached to this post.

_________________
Once in a while you get shown the light in the strangest of places if you look at it right - Robert Hunter


Last edited by J De Rocher on Mon Jul 15, 2019 10:41 am, edited 1 time in total.

These users thanked the author J De Rocher for the post: DanKirkland (Mon Jul 15, 2019 12:05 pm)
Top
 Profile  
 
Tim L
 Post subject: Re: SM HD28 Plan
PostPosted: Mon Jul 15, 2019 10:24 am 
Offline
Contributing Member
Contributing Member

Joined: Tue Jan 29, 2008 11:14 am
Posts: 819
First name: Tim
Last Name: Lynch
City: Santa Cruz
Zip/Postal Code: 95060
Country: United States
Focus: Build
Status: Amateur
I think the number you want is from the body/neck join to the intersection of the X braces. Should be close to 9"+ but I would go to the UMGF and search what people over there
have documented.
Top
 Profile  
 
klooker
 Post subject: Re: SM HD28 Plan
PostPosted: Mon Jul 15, 2019 11:38 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Tue Aug 17, 2010 3:31 pm
Posts: 1682
First name: Kevin
Last Name: Looker
City: Worthington
State: OH
Zip/Postal Code: 43085
Country: USA
Focus: Build
Status: Amateur
I don't think it's forward shifted.

Here's another thread about that plan you should look at regarding the bridge plate.

viewtopic.php?f=10101&t=51520&hilit=bridge

Kevin Looker

_________________
I'm not a luthier.
I'm just a guy who builds guitars in his basement.
It's better than playing golf.


These users thanked the author klooker for the post: DanKirkland (Mon Jul 15, 2019 12:09 pm)
Top
 Profile  
 
Clinchriver
 Post subject: Re: SM HD28 Plan
PostPosted: Mon Jul 15, 2019 5:15 pm 
Offline
Contributing Member
Contributing Member

Joined: Sat Feb 19, 2011 7:44 pm
Posts: 1225
Location: Andersonville
State: Tennessee
Country: USA
Focus: Build
Status: Professional
Based on John Arnolds tracing taken from his original 1937 Herringbone 1"-3/16" from the lower edge of the sound hole to the center of the X. This has been my blueprint for my Dreadnought guitars not sure how it compares to any others.


These users thanked the author Clinchriver for the post: SteveSmith (Mon Jul 15, 2019 7:01 pm)
Top
 Profile  
 
guitarjtb
 Post subject: Re: SM HD28 Plan
PostPosted: Tue Jul 16, 2019 7:42 am 
Offline
Contributing Member
Contributing Member

Joined: Sun Jul 24, 2005 7:12 am
Posts: 712
Location: United States
How consistent is the sound hole location on Martin Dreads through the years. My experience is that the sound hole diameter is very consistent at 4". But I have not measured the distance from the front edge of the Martin dread to the front edge of the sound hole on very many.

Most people always talk about the location of the X behind the sound hole. It will change everything if the sound hole is a little more forward or a little rear shifted. The location of the X should be measured in terms of the 12th fret location. This keeps the relationship of the braces with the bridge and bridge plate consistent with the guitar you are trying to emulate.

What is the measurement from the front of the guitar to the front of the sound hole on your Martin D or on your Martin D blue print?
Top
 Profile  
 
SteveSmith
 Post subject: Re: SM HD28 Plan
PostPosted: Tue Jul 16, 2019 8:26 am 
Offline
Contributing Member
Contributing Member
User avatar

Joined: Wed Oct 08, 2008 11:36 am
Posts: 7380
Location: Southeast US
City: Lenoir City
State: TN
Zip/Postal Code: 37772
Country: US
Focus: Repair
Clinchriver wrote:
Based on John Arnolds tracing taken from his original 1937 Herringbone 1"-3/16" from the lower edge of the sound hole to the center of the X. This has been my blueprint for my Dreadnought guitars not sure how it compares to any others.


I'm also using John Arnold's '37 tracing. From front of box at 14th fret to soundhole is 3 3/4", soundhole is 4" so looking at 8 15/16" from front of box to center of the X.

_________________
Steve Smith
"Music is what feelings sound like"


These users thanked the author SteveSmith for the post (total 2): guitarjtb (Tue Jul 16, 2019 5:58 pm) • Clinchriver (Tue Jul 16, 2019 4:58 pm)
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  Page 1 of 1
  [ 7 posts ] 

Board index » Luthiers Forum Rooms » Guitar Building Forum

All times are UTC - 5 hours


Who is online

Users browsing this forum: Terence Kennedy, TimAllen and 67 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