My First glass bow broke :(

[Sixby]

Here is my take on this. The clue is that you had to mix another batch of glue because you ran out. I would bet that the glue did not get mixed long enough. I mix all my glue for 180 seconds with a beat each second. Also use a double glue bowl or cup and half way through pour the glue out of the first mix cup into the second one and wipe the stick clean before continuing to mix.
What possibly happened was some of the glue did not get mixed enough to have a molecular mix and did not properly harden. It then will spread as someone else described and delaminate at the highest pressure point. In this case the fades which are showing a slight but definite over bend in the drawn profile. I would recommend laying up with a bit more taper .

The bow should not have had a problem though unless either the wood itself delaminated or the glue line delaminated. That cannot be ascertained with the pics we have.

I really like the bow and it looks like you did a good job.

I recommend wiping glass and carbon with acetone/ Brush wood with a stiff brush and do not wipe with anything but acetone and only if somehow you have an oil spot or wax spot on the wood. We have two ways of learning these things. Either listen to people that have learned by experience or experience the consequences and learn by your own experience. I learned the expensive way until I learned to learn the easy way.


God bless, Steve

[fujimo]

good advice steve!  

[Krasus]

I never wipe my glass with acetone as I normally  use it to thin or disolve fibre glass and I don't want that to happen to the bow glass. I started using isopropyl to clean my glass. Works great and isn't as toxic. Also won't weaken the glass.

Speaking of heating smooth on vs not heating. I have found that if you don't heat it, it seams to stay kinda almost greasy. Whereas heated it's as hard as a rock.

Input gang? (As I may be just out to lunch,but it works for me)