I would echo exactly what Rob said. I have flown my KR with the original plans elevator and flight tested to 225 mph IAS. After 500 hours, I changed to the newer tail with the 0009 airfoil and have flight tested it to 215 mph IAS. Neither tail had counterweights and neither tail showed any propensity towards flutter.
I routinely descend from 12,500' to 7000' for landing with the ASI showing 190 mph IAS, which is roughly 220 mph TAS at those altitudes. At well over 1000 hrs flight time in this plane, I have never observed any flutter issues. -Jeff Scott Los Alamos, NM > > Subject: Re: KR> counter balanced elevator > > The design does not require any balance weights on the elevator, just the > ailerons. > > Rob Schmitt > N1852Z > WWW.robert7721.com > > > > > > On Jul 31, 2014, at 9:43 AM, cruzj12--- via KRnet <krnet at list.krnet.org> > > wrote: > > > > My counter balanced eleavtor horn has limited area for adding enough weigt > > to static balance the elevator.I need approx 2.2 pounds on each side. > > Should I add as much lead weight as possible and forget about it. or should > > I not install any weights in the elevator? > > KR1.5 N3151K new modified tail. Thanks, Joe > > > > Joe Cruz >
