This project was my latest attempt to build a better FPV platform than a stock model. Unfortunately during it's maiden flight it was found to be highly sensitive to control input with constant adjusting required. I managed to get round a full circuit to land but when coming into a glide slope for landing, slowing down the whole high sensitivity got massively worse, lost air-speed and stalled cracking the wing completely in 2 while 1 piece was still bolted in place - says enough.

I decided to post the project anyway because it's a case of lesson learnt with the design flaws and to be honest is totally surprising it was able to fly a circuit at all.

This glider is pure balsa with carbon fibre re-enforcements, it has a 2 meter wingspan which where designed to come apart into 1 meter pieces for storage. Motor to tail it was 112CM long, the tail was a solid carbon fibre rod 5MM in diameter but it still was pretty flexible this is where my mistake lies. In flight the vibration of the airflow caused a fish tail effect which in turn adjusted the control line lengths (by swaying right it would pull more on the rudder than it should for example). So each correction to bank the opposite way to the roll resulted in the tail flexing and the rudder pulling in the opposite direction so it was full on correcting.

If your building something similar with a not so light model (500 grams +) I'd suggest continuing the fuselage as a whole balsa construction to the tail OR using a 7MM/5MM carbon fibre tube and epoxy the rod inside like a sleeve but this is more weight (I already had to add 245 grams of lead in the nose!) Well here's the build: