It might be worth noting that the plans don't call for balancing either the elevator or rudder. With the stock KR tail, I've had mine up to 225 mph IAS with no indication of flutter. After I removed that tail and built a new horizontal elevator and stab using the NACA 0009 plan form Mark has provided on his web site, I have had to plane to 215 IAS, again with no indication of flutter. Neither tail was balanced. I had planned to balance the new tail, but just couldn't bring myself to add 4 pounds of lead to the tail.
I'll also point out that there is absolutely nothing wrong with mass balancing the surfaces, and in fact it is a good idea, although apparently unnecessary in the KR series. On another note, this weekend I received the Airworthiness and got in the first flights on the home built SuperCub I've been building. Photos and video at <http://www.flickr.com/photos/mouser-nerdbot/5797292686/in/set-72157626883724138/lightbox/> and the construction web log is at <http://jscott.comlu.com> Jeff Scott Los Alamos, NM KR-2S N1213W SuperCub N143W Christo Theron wrote: >>I am busy with the elevator and rudder static balance. My elevator and rudder is extending forward to the forward spar. Can any body tell me if the counter weight has to balance the elevator / rudder or is it lighter or heavier than the elevator / rudder?<<
