AHG octave mando build

[GGJaguar]

Is X-bracing the back unusual for mando family instruments or is there no standard for this?

 

[AcornHouse]

Is X-bracing the back unusual for mando family instruments or is there no standard for this?

No standard, but x-bracing has become more popular amongst modern builders. It makes sense for a more or less circular body shape.

 

[AcornHouse]

Unclamped, squeeze out and shaping will need to wait until Sunday (probably). I will also need to glue a cap over the open part of the lap joint for strength.
You can see the arching again the straight edge in the second pic.

 

[AcornHouse]

Quick little addition for today. A lap joint, used in all x-braves, has one major weak point in the arm that was cut with the open side facing up. At that point, the structural height is cut, literally, in half. Martin and other historical builders addressed this weakness by glueing a small patch of cloth, which doesn't really do much. Contemporary builders add a small bit of wood to bridge the gap and, effectively, restore the height and the full strength. It's the same principle as a plumber running a pipe through a beam. Do it in the middle and there's no problem. Notch it half way through and Grandma's sitting in a tub amidst a pile of debris one floor below.

 

[Nuuska]

Oh no ! ! !


Now my mind starts thinking of them forces acting at tha joint. And it is already half past midnight.

Forget about a loose back - concentrate on final box where sides provide stiff support.

I suppose - I REALLY do not know - that this x-connection is cut 50-50.

What if ?

What if the lower brace, that goes under, is cut deeper - like only 40% wood and upper crossing would have 60% wood ?

What are the forces influencing this joint?
Do they pull or push?
Or one pulls & other pushes?
Can I go to sleep?
Shall I have one more beer?

I'll leave it up to you - meanwhile I'll get one more beer and then hit the hay.

Nighty nite to ya'll

 

[AcornHouse]

Oh no ! ! !


Now my mind starts thinking of them forces acting at tha joint. And it is already half past midnight.

Forget about a loose back - concentrate on final box where sides provide stiff support.

I suppose - I REALLY do not know - that this x-connection is cut 50-50.

What if ?

What if the lower brace, that goes under, is cut deeper - like only 40% wood and upper crossing would have 60% wood ?

What are the forces influencing this joint?
Do they pull or push?
Or one pulls & other pushes?
Can I go to sleep?
Shall I have one more beer?

I'll leave it up to you - meanwhile I'll get one more beer and then hit the hay.

Nighty nite to ya'll

Is your hay in square bales or large round bales?
Do cows prefer one over the other?
Is it easier to process square or round?
Why do you have to hit it, it didn’t do anything to you?
Should it just be left in haystack?
Will there always be a needle in a haystack, or do we have to supply our own?
Why would you even have a needle near a haystack?

 

[AcornHouse]

Went ahead and finished shaping the back braces.

 

[Default]

Is your hay in square bales or large round bales?
Do cows prefer one over the other?
Is it easier to process square or round?
Why do you have to hit it, it didn’t do anything to you?
Should it just be left in haystack?
Will there always be a needle in a haystack, or do we have to supply our own?
Why would you even have a needle near a haystack?

In the spring we sew seeds for the fall har vest.

 

[GGJaguar]

You should trademark that as "asterisk bracing".

 

[The Guilds of Grot]

Everybody knows cows don't like round hay bales, they can't get a "square" meal!

 

[Prince of Darkness]

You should trademark that as "asterisk bracing".

 

[AcornHouse]

Notching time (then natchos?!?). Get the back lined up on the body and mark to cut the braces to length and create the notches in the lining to accept them.



(Still trying to work out autofocus inside the box.)

 

[GGJaguar]

Box closing imminent!

 

[AcornHouse]

 

[AcornHouse]

 

[AcornHouse]

Pickup installed (complete with ultra-hi-tech cord retention system).

 

[GGJaguar]

Built-in stethoscope. What will they think of next?

 

[Default]

Fwiw, that pickup pegged the input on my buddy's interface.

 

[AcornHouse]

Fwiw, that pickup pegged the input on my buddy's interface.

Perfect to use with a Hi-Watt double stack.

Or this.

 

[AcornHouse]

All hands on deck! This is not a drill, repeat, this is NOT a drill!!