ORIGINAL: leftnut
it's okey to ca the first part.
but i'm not fast enough for the second.
Not true. Thin CA works on a capillary principle. That means it needs a porous surface to stick properly. If you put the hinge in one side and CA it in place, the CA will wick over the entire surface of the hinge and seal all of the pores. It still may stick in the other side, but the bond will not be very good.
CA will also wick into the flexing part of the CA hinge..making it hard
and brittle. a rip or crack will develope later.
i draw a center line on the hinge with crayons to prevent epoxy from
sticking to the flex piont and clean off the epoxy as much as i can.
Personally, I don't believe this theory. What's to prevent the CA from wicking UNDER the crayon? But if it blows your skirt up, I can't see that it would do any harm
plus it also depends on how you cut the slot. if you used an xacto,
sometimes there's thin slices of wood in the slot. makesure you clean that out
or the hinge will only stick to that thin loose slice.
Again, not true. The CA will wick into the balsa and glue the hinge to the slice, and the slice to the rest. However, it's a good idea to keep the slot clean so that the hinge doesn't push that slice in and jam things up.
to put my mind at rest. i drilled tooth picks in the hings TE and control surface.
this will prevent any put outs.
The beauty of CA hinges is their ease of use. If installed properly, no pinning is needed