I have two Kr2 a/c in my garage, recently imported from Canada, one for me and one for one of my good flying friends.
Doing a W & B I found both to be very similar in weight. A/c #1 (neither yet have an Au rego) appears to be in good balance and has a small tail down force when empty in the level attitude. A/C 2 appears to have an aft CG situation but wants to tip on its nose when level. Only thing I could think of is main wheel location, and sure enough, A/C 2 has its main wheels about 3 inches aft compared to a/c 1 (using the wing leading edge as a reference). My calculations indicate that this is about how much the wheels need to be moved to achieve a light (1 to 2 Kg) downforce on the tail when the a/c is level. This a/c (#2) also has a heavily modified tail group with triangular shaped extensions to the leading edges of both the fin and the HS. Whilst focussing on A/C 1 at the moment I need to plan what to do with #2. My instinct is to return the tail group to standard, deal with the c.g. issue and move the wheels forward ..... comments? Also, what is the best way to move the wheels ... should I contemplate cutting into the wing lower surface and shim the legs at the spa attachment, or should I contemplate a considerably modified bracket for attaching the stub axles to the legs? ... Regards Martin
