Forma for The Soil Strad

[Peter K-G]

I need to make a new mold for my Soil project. Anyone could share a full scale drawing? What is the optimal thickness for linings on both sides?

 

 

[Addie]

Is that the "G"?

I have full size drawings of several, including the G.

[Michael_Molnar]

I think it's the "PG".

 

I'll check later.

[Berl Mendenhall]

I'll side with Addie, I believe it's G.  I heard a Pearlman interview once and he said he liked it because it was just a little bit bigger than most violins.  I could be wrong, that's just from memory. We all know how that goes.   

[Michael_Molnar]

According to Pollens it is a "G" form. See Stradivari p. 112.

[Peter K-G]

So next would be to start negotiating with Addie to get the G mold drawings

[Addie]

I believe your first born male child is the customary offering... or is it spinning straw into gold?  Oh, well, never mind.

G Mold Upper-A4.pdf

G Mold Lower-A4.pdf

[Davide Sora]

The original neck of the Soil is preserved in the "museo del violino" here in Cremona and brings the autograph letter G on the remaining pegbox side.

According to Sacconi (page 126), this should indicate the form used to build that violin.

However even the Messiah brings the letter G written inside the pegbox but would seem built on the PG form.

This two forms are very similar and in my opinion the G is the "remake" of the worn PG, so maybe the letter inside the pegbox is not so representative of the form used and could be related to the neck pattern.

And so, G or PG? Difficult to be sure, although I am inclined more to the G.
The only photos and measurements that I know for the Soil can be found on the book "Antonio Stradivari - L'esposizione di Cremona del 1987"

and were taken (the measurements) by Bruce Carlson if I remember correctly, so maybe he could help.

 

Davide
 

 

 

[Urban Luthier]

i believe the difference between the PG and G is the lower bout is a bit wider and a little longer

[Peter K-G]

I believe your first born male child is the customary offering... or is it spinning straw into gold?  Oh, well, never mind.

 

 

 

The original neck of the Soil is preserved in the "museo del violino" here in Cremona and brings the autograph letter G on the remaining pegbox side.

According to Sacconi (page 126), this should indicate the form used to build that violin.

However even the Messiah brings the letter G written inside the pegbox but would seem built on the PG form.

This two forms are very similar and in my opinion the G is the "remake" of the worn PG, so maybe the letter inside the pegbox is not so representative of the form used and could be related to the neck pattern.

And so, G or PG? Difficult to be sure, although I am inclined more to the G.

The only photos and measurements that I know for the Soil can be found on the book "Antonio Stradivari - L'esposizione di Cremona del 1987"

and were taken (the measurements) by Bruce Carlson if I remember correctly, so maybe he could help.

 

Davide

 

 

 

 

 

 

Thanks Addie and Davide!

[Peter K-G]

Really nice drawings Addie!

 

(and sometimes my son would go for free he is 16)

[Addie]

Peter, does your son do fences?  I need about 300m put in.  

 

 

[Janito]

@ Addie

 

I noticed you specify A4.  Do these PDFs distort if they are printed in US Letter size?

[Janito]

@ Addie

 

I noticed you specify A4.  Do these PDFs distort if they are printed in US Letter size?

 

and the answer is Yes.

[Urban Luthier]

make sure your printer is set to print at 100 percent

[Janito]

make sure your printer is set to print at 100 percent

 

Too true. Thanks!

[Addie]

@ Addie

 

I noticed you specify A4.  Do these PDFs distort if they are printed in US Letter size?

You probably want this one...

G Mold US-Legal.pdf

[Janito]

You probably want this one...

 

Thank you.

[David Hart]

make sure your printer is set to print at 100 percent

Unless you're David Burgess.

[Peter K-G]

Thanks!

 

http://www.thestradsound.com/ongoing/makinganewmold-stradivarigforma

 

Is 12 mm thick sufficient for setting linings on both sides?

[Janito]

Is 12 mm thick sufficient for setting linings on both sides?

 

You can work that one out with some simple Maff (translated as Maths).

[Peter K-G]

?

[Peter K-G]

On mold thickness

http://www.maestronet.com/forum/index.php?/topic/236259-mold-wood-thickness/

 

For Janito only:

The Maths 1/2" = 0,5 * 2,54 cm -> 12,7 mm

[Janito]

For Peter only

 

Mould thickness = minimum rib height - [(2x lining width) + (~ 2 x 2 mm for clearance between mould and lining)].

 

Say 30 mm - 2x8mm - 4mm = ~ 10 mm. 

 

So 12.7mm would work if you have less clearance between lining and mould and narrower linings.

 

But you knew that already.

----------------------------------------

 

One thing to remember if that a thicker mould is more difficult to remove from the garland if you are one of those folks who glues all the linings in before removing the garland.

[Peter K-G]

 

One thing to remember if that a thicker mould is more difficult to remove from the garland if you are one of those folks who glues all the linings in before removing the garland.

 

That's why I asked for thickness, because it can't be calculated

It must be tested and from what I have read 13 mm is good to remove the mold, when both linings are glued.