Hi Bill Most odd :-)
Those figures seem similiar to mine and others. You should be able to keep within 8 to 12 " aft of leading edge in most loadings. Although RR states 16" as the rear limit, many have experienced danger back there. The airfoil should produce a nose down attitude as the stall breaks because the Centre of Lift moves rapidly backwards behind the CoG. As Ken said this powerful moment can occur in the KR even with the stick kept back. Prior to the stall in level flight the nose will seem really high because a large Angle of Attack is needed to offset lack of airspeed and maintain lift....guess you know all that though :-) Which way does the nose move if you give her a burst of power in that crazy attitude? Maybe a test pilot could help you out a bit. Maybe you could hang the engine out front a bit more?? Hard to tell when ya upside down on the world in Australia. John ----- Original Message ----- From: "countryhomeprint" <countryhomepr...@bellsouth.net> To: <kr2coo...@earthlink.net>; "KRnet" <kr...@mylist.net> Sent: Friday, March 31, 2006 9:51 AM Subject: Re: KR> cg with Deihl wing skins > Jack, I had 2 different cg calculations done by two different A & P's > using > two different datum points and the results came out within 1/4 inch of > each > other. These calculations came out to be approximately 1 inch from the > front > limit of the cg envelope. (9 inches from front edge of wing) > Bill Page > boliverp...@bellsouth.net > > ----- Original Message ----- > From: "Jack Cooper" <kr2coo...@earthlink.net> > To: "KRnet" <kr...@mylist.net> > Sent: Thursday, March 30, 2006 11:22 AM > Subject: RE: KR> cg with Deihl wing skins > > >> Bill >> >> Have you had someone else review your W&B figures?? A double check of the >> figures with different eyes may be very helpfull. This is an important >> issue and a review of the figures wouldn't hurt. >> >> Jack Cooper >> >> >>> [Original Message] >>> From: countryhomeprint <countryhomepr...@bellsouth.net> >>> To: KRnet <kr...@mylist.net> >>> Date: 3/29/2006 9:16:41 PM >>> Subject: KR> cg with Deihl wing skins >>> >>> Recently the first flight was made in 880AB. As with most any >> experimental aircraft a few problems occur. Question? Is the cg range for >> Dan Deihl wing skin wings the same as for the standard KR-2 wings? >> N880AB's >> cg falls within the limits for the standard KR-2, however my KR feels >> tail >> heavy. I am unable to establish a true stall due to the uncontrolled >> pitching up of the wings prior to stall. It feels as if the horizontal >> stab >> and elevator are stalling prior to the wings. This happened during the >> first stall approach and a stall approach will not happen again until the >> problem is solved. Has anyone experienced this? Anyone have a thought as >> to >> WHY. This could be a dangerous situation. >>> >>> Bill Page >>> boliverp...@bellsouth.net >>> _______________________________________ >>> Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp >>> to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net >>> please see other KRnet info at http://www.krnet.org/info.html >> >> >> >> >> _______________________________________ >> Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp >> to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net >> please see other KRnet info at http://www.krnet.org/info.html >> > > > > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
