ORIGINAL: BrianB
Adrian, yes stock rudder was used but had it hinged with ca hinges and the leading edge was replace with balsa. Rear former in front of fin was installed. This plane had quit a few flights on it and I figured it was going to hold fine with the mods but I guess I was wrong. Think Im ordering a BRIO! Here is a pic of the rear. Good luck with yours, some last and some don't!
From your pictures it does not look like you have a former at the rear of the canopy installed and it also looks the crutch didn't come all the way up to the rear of the canopy. The failure looks like it occured where the crutch ended...
Mine is just about finished (not painted as of yet) and I've put in all the mods everyone has suggested (crutch, new rudder, former at the rear of the canopy, former at the base of the fin, and the additional brace that Eric H. put in as well) so I'm hoping it will last. Again, this will be an IC (160 DZ) powered - I've seen 1st hand the electric powered one that FokkerPilot has and it flys very, very well.
I've also seen an electric Abbra (Jerry Budd's) and it also flies very, very well. If I had my druthers... I'd go with the Abbra but you'll have a wait for one.