Originally Posted by Finnspeed
I agree and will test moving the CG a bit more aft. I already noticed that most of the knife edge tendency towards cabin was my elevator trim.
I'm currently playing with some Glavak props. They are lighter and better fit to the motor that is now on the nose of my Sirius. The SG 9x2.8 works extremely well and weighs only some 2.4 g. I have also tested the SG 9x2.3 that works fine as well if you prefer slow flying style - I'm so new with F3P that I can't decide yet...
I also have some new 180 mAh batteries (11.5 g) that are about a gram lighter than the previous ones. The new prop and battery actually moved the CG a bit more back and the plane flew fine and stable. I'll check where the CG is with this equipment soon.
I ran one of the Glavaks on my Osiris and liked it very much too. 2.5g versus the 4g GWS props is a nice benefit as well. Believe it was the 9x2.3 (wider bladed prop). Really, really liked it. I'll be flying a Glavak at ETOC on my pattern ship.