I rather doubt you could get the Caelus to balance properly with a Contra without placing the rudder servo in tail and replacing the battery tray and installing the tray after the plane is assembled. My question is why would you want the Contra?
Drop in a good motor, use a three blade prop and keep the weight down.
I've been struggling to figure out where the CG should be. Fortunately for me I have an FAI pilot that's within an hour drive (Ken Velez). He spent a good two hours working on set up, throttle curve, atv and trimming yesterday. All the changes he made were an improvement.
I needed to know for certain if the plane was setup correctly. He spent a bit of time adjusting the wing panels and moving the batteries and flight pack back. The plane now lands much better and the plane inverted much better. The rest is on me now to improve my skills (or lack of).
Also, I've taken a several photos along the way, during the building process. If you're interested I can place them in a public Dropbox folder if it helps.
Last edited by mgosson; 07-29-2016 at 06:48 AM.