OK first off, you should use CA in a well ventalated area. That said, you can build a lighter, STRONGER airplane with CA. With CA, your fits MUST be tight. if you fit a wing rib to a spar, and their is a .010" gap, thin ca WON'T bridge the gap, resulting in a weak joint. that same .010" is no problem for wood glue.

So when I lay out my plans, to cut templates to "kit" an airplane, I intentionally trace my inside fits (ex: the notch in a wing rib that saddles the spar) to the INSIDE, resulting in a part wit a very tight fit, that often requires sanding to "open up" to achive the desired fit. Then during assembly, I "tack glue" a structure together with thin CA (just a drop to hold it in place) and follow up with medium CA to finish the job.

CA will result in a lighter airplane for the following reasons. 1: it takes a smaller volume of glue to do the same job. 2: 1oz of CA is lighter than 1oz of wood glue. 3: because your joints fit tighter, you will need less structure.

CA will result in a stronger plane because you have got to FIT the plane together tighter from the start.