I had previously reported that I would need to add 49 pounds ballast at the engine area to meet my goal of moving the cg 3 inches forward on my KR-2 . I had reported some erroneous numbers for the weight and location of the elevator balance weight. The correct numbers are 4.71 pounds with an arm of 95 inches. The nose ballast location is still 23 inches forward of the stub wing leading edge. Doing the math: 4.71 x 95 / 23 = 19.45 pounds ballast. By removing the elevator balance weight with its mounting and bolts, I will not need that 19.45 pounds of ballast in the nose. For the ELT move from the baggage shelf to the cockpit floor forward of the spar: The ELT with batteries and rack weighs 3.5 pound. The arm at the baggage shelf is centered at 60 inches. The new location is centered at 0 inches arm. No weight loss with moving the ELT, but the previously needed ballast would be 3.5 x 60 / 23 = 9.1 pounds, now no longer needed. With the removal of the elevator balance weight and move of the ELT, the current ballast is now: 49 - 19.45 - 9.1 = 20.45 pounds.
A pound or two at long moment arms does make a big difference. Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA
