Boomilever B/C

[scioly2345]

Just to clarify,
Has everyone come to a collective decision that the best glue to use in the compression joints is the Bob Smith Medium CA (the purple bottle)?
I was thinking of trying some booms with the thin Bob Smith CA (the light blue bottle), but I just wanted yall’s opinions as well.

[Tendan]

Just to clarify,
Has everyone come to a collective decision that the best glue to use in the compression joints is the Bob Smith Medium CA (the purple bottle)?
I was thinking of trying some booms with the thin Bob Smith CA (the light blue bottle), but I just wanted yall’s opinions as well.

It depends on what you are doing. For me, the larger the surface I'm gluing, the more likely I am to use blue because it makes sure that the whole connection has glue. I stick to purple most of the time though because blue can be a crazy mess to work with.

[RobertYL]

Has everyone come to a collective decision that the best glue to use in the compression joints is the Bob Smith Medium CA (the purple bottle)?

I believe that ease of construction is as important, maybe even more important, than structural integrity. I remember reading somewhere that blue CA is stronger than purple CA if used optimally. However, it's much harder to use and could only be stronger by a negligible amount. I almost always use purple CA so I can have that flexibility of a couple seconds to glue pieces together.

[Lorant]

Just to clarify,
Has everyone come to a collective decision that the best glue to use in the compression joints is the Bob Smith Medium CA (the purple bottle)?
I was thinking of trying some booms with the thin Bob Smith CA (the light blue bottle), but I just wanted yall’s opinions as well.

So it all depends on the type of joint that you have to glue. If it is a reasonably large overlap between two pieces, use the purple because that will partially soak into the wood but not disperse so much that there is no hold between the pieces. Use blue when you want to fix a thin (ex: 1/16*1/16 square) piece that broke somewhere along its length. Basically, use the blue any time you want the glue to get between the grains of wood, and then push the grains back together thus getting a perfect bond. Use the pink glue when you need to fill gaps between two different pieces of wood. The purple is viscous so it will not be absorbed by the wood as well so it will leave a sort of "bubble" on the wood or will fill the small space left between two joined pieces of wood.

[scioly2345]

Just to clarify,
Has everyone come to a collective decision that the best glue to use in the compression joints is the Bob Smith Medium CA (the purple bottle)?
I was thinking of trying some booms with the thin Bob Smith CA (the light blue bottle), but I just wanted yall’s opinions as well.

So it all depends on the type of joint that you have to glue. If it is a reasonably large overlap between two pieces, use the purple because that will partially soak into the wood but not disperse so much that there is no hold between the pieces. Use blue when you want to fix a thin (ex: 1/16*1/16 square) piece that broke somewhere along its length. Basically, use the blue any time you want the glue to get between the grains of wood, and then push the grains back together thus getting a perfect bond. Use the pink glue when you need to fill gaps between two different pieces of wood. The purple is viscous so it will not be absorbed by the wood as well so it will leave a sort of "bubble" on the wood or will fill the small space left between two joined pieces of wood.

Thank you so much, I’m gonna try connecting my 1/16 square compression cross pieces with blue CA because with the purple CA they break along along their lengths.

[Lorant]

Just to clarify,
Has everyone come to a collective decision that the best glue to use in the compression joints is the Bob Smith Medium CA (the purple bottle)?
I was thinking of trying some booms with the thin Bob Smith CA (the light blue bottle), but I just wanted yall’s opinions as well.

So it all depends on the type of joint that you have to glue. If it is a reasonably large overlap between two pieces, use the purple because that will partially soak into the wood but not disperse so much that there is no hold between the pieces. Use blue when you want to fix a thin (ex: 1/16*1/16 square) piece that broke somewhere along its length. Basically, use the blue any time you want the glue to get between the grains of wood, and then push the grains back together thus getting a perfect bond. Use the pink glue when you need to fill gaps between two different pieces of wood. The pink is viscous so it will not be absorbed by the wood as well so it will leave a sort of "bubble" on the wood or will fill the small space left between two joined pieces of wood.

[LoneMonkey]

Another noob question!

Is there a way to avoid having to bend the tension members so that they can be closer together where they attach to the j-hook?

[Tendan]

Another noob question!

Is there a way to avoid having to bend the tension members so that they can be closer together where they attach to the j-hook?

I am assuming that you mean a sideways bend towards the hook in the members running from the loading block to the j-hook, which does not matter at all as long as they are the same length and at the same angle. You could mount them in such a way that they don't bend, but as far as I know, no one does that. If I read your question wrong, just clarify how they are bending.

[Lorant]

Another noob question!

Is there a way to avoid having to bend the tension members so that they can be closer together where they attach to the j-hook?

You don't need to bend anything, so long as the chip that connects the two tension pieces at the hook is small and sturdy, the tension pieces should fall into a nice angle, converging near the hook.

[JZhang1]

The 1/16 square basswood tension members I use can never seem to get full load. What density tension members have you guys seen get full load consistently? Also I remember reading something about using a luggage scale to test the tensile strength of tension members. Does anyone have any specifics on how to do that? Thanks