From reading many RCU forums, I believe that the reason that most CA hinge failures occur is due to CA causing the hinge line to become brittle and eventually break. The suggested number of drops of CA for installation is important to the life of the hinge for this reason.

However I read a review about six years agoe for a Global Hobbies 40 size Freestyle plane, and the person writing the review gave a suggestion that made sense to me and I have followed faithfully since when I install CA hinges.

The suggestion was to place a straight edge across the hinge line and use a sharp Crayola crayon (i use white) to forcefully scribe a line on both sides of the hinge. This wax from the crayon prevents the CA from completely saturating the hinge line while the rest of the hinge is saturated and bonds well to the balsa. This simple measure allows the hinge material at the hinge line to remain flexible and strong. It seems to have worked for me for the past six years as the first hinges that I did this to are still strong and very flexible.

Using the crayon method made sense to me and I recommend it for anyone using CA hinges.

I have had no problems ever with CA hinges; however I do not use them for my large gas planes as I prefer the Robarts when using high torque servos and I have sizable investments to protect.