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#Post#: 12042--------------------------------------------------
Use of Ash for Body Framing
By: TomFDS Date: November 29, 2024, 7:32 am
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I have the space and kit to set up bending jigs, a steam cabinet
etc to bend ash strip for my sub structure, onto which the body
panels would be fitted.
Has anyone in the club done this with their build? I know
plywood is cheaper and if my experiments fail that might be my
other option but I am just keen to hear peoples experience.
My other option will be to make all the “ribs” of the body from
either steel or aluminium but that will involve a lot of
shrinking/stretching vs making the jigs and bending some wood.
I was thinking 9mm thick by 25mm wide ash PSE, as that would
take fixings. Should I go thicker or thinner?
Just want to weigh the options before going down another rabbit
hole!
#Post#: 12043--------------------------------------------------
Re: Use of Ash for Body Framing
By: Graham Hill Date: November 29, 2024, 9:43 am
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Hi Tom. Look up 'Bridget the White Riley' in the build section.
Richard is a guitar maker and his CK sounds great!
#Post#: 12044--------------------------------------------------
Re: Use of Ash for Body Framing
By: RhysN Date: November 29, 2024, 10:03 am
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I have built the body frame for my full size Morgan with ash,
it's not the easiest to get a glue joint to hold, and don't even
contemplate that after steaming as most glues will reject
because of the moisture.
In regards your dimensions, that would depend on spacing, and
where in the body.
I haven't used the other methods you mention, the ones I have
done and only the Kim inspired car has seen use here in the UK a
long time ago, have been self supporting, either alloy or
fibreglass. If it's any use, the 90 year old bonnet on my Morgan
measured at just under 1 mm.
#Post#: 12045--------------------------------------------------
Re: Use of Ash for Body Framing
By: TomFDS Date: November 29, 2024, 11:15 am
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As an expert in nonjoinery, I appreciate the advice about glue.
I think some prototype investigation will also help, Graham I
will look at that build log. I am more guitar breaker than
guitar maker so I probably need to read it!
#Post#: 12046--------------------------------------------------
Re: Use of Ash for Body Framing
By: Jimr1999 Date: November 29, 2024, 12:08 pm
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Use a polyurethane adhesive such as the orangey yellow gorilla
glue, that type of adhesive works well on ash but sets by
absorbing water to start the chemical reaction. It is stronger
on wet timbers. Lignin in timber softens at 85 degrees Celsius.
The wood needs steaming until it is at least 95 c throughout and
forming quickly before it cools and the lignin sets again in its
new form. Aim to slightly over bend things in frames as a bit of
Spring back is usual
HTML https://www.screwfix.com/p/gorilla-glue-polyurethane-adhesive-115ml/54593
Jimr
#Post#: 12049--------------------------------------------------
Re: Use of Ash for Body Framing
By: TomFDS Date: December 1, 2024, 3:21 am
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More good tips, I have some of that type of adhesive in the
shed. Also over bending, I had not considered the spring back.
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