pkoury,

Did my pictures and the drawing by JohnGilmore satisfy you as a proper answer to your question ?

Can you see how the filleting adds little weight while increasing the binding area up to five times or in accordance of how the fillets are made and extended ?

The two pictures I posted of thered piece may have appeared funny to some viewers.
That part is a cover on the nose top with an IC engine that did not use a muffler in the old days.
that part was treated for resistance to the exhaust residues. Some of the glue fillet were colored red to help evaluate the deposits from the exhaust on the glued joints. That part was built in the late 1950s. You can see the date of the picture at its bottom right corner. It was still undamaged at the date of the picture after that model crashed dozens of times.

It is part of my experimental radio control model that used to crash as often as it had a nice landing. The nose of that model never colapsed. It has a shaped steel nose piece backed by hardwood engine mount that goes all the way to be in line with the trailing edge of the wings. That plane weighted 8 (eight) lbs.and has a span of 72 inches. It is still in my hangar.

CA was unknown in those days and the model was all double or triple glued to make fillets everywhere.

I hope this information is useful to new builders.
We ( you ) should do your own evaluation of this technique and disregard any postings made by some fellows that proclaim that CA is as good.

There is no doubt that CA and shrink film is fine while flying if used properly.
Some building instuctions are suggesting CA to back up their claim of a kit that is claimed to be built in only a few hours, so buy it NOW and fly in just a few hours.

It is in a crash that the difference is seen. The more pieces to be picked up, the more chances that you will buy anoher kit. That is good business for the industry.

You are always free to do things your own way. Not all modelers or fliers are rich and can afford to keep buying new planes whethr they are kits, ARF or RTF or BNF or pre-built by others.

Have fun and avoid crashing to the best of your ability.

Zor