Dan: Your stall speed can be calculated (well, estimated) without flight tests by looking at the basic formula: L = W = 1/2 rho V^2 x S x Clmax . Without going into too much detail, the W (weight) in this formula affects the stall speed linearly. The RR website lists the KR2 stall speed as 52 mph, which will have been established at sea level and 900 pounds. If you increase your W by 33%, your stall speed will increase by 33% to about 69 mph. You have to ask yourself; "If the engine quits, do I want to be maneuvering to land in a pasture at 90 mph?, or 68 mph?"
Structure strength is an entirely different issue, Dan. Most homebuilts are designed to +6 and -4 maneuvering gs and gust loads are simply ignored. I have no idea if the KR series was designed to these limits. You might consider that a 6g airplane, overloaded by 33% is only a 4.5g airplane while maneuvering in still air. The gust load capacity, which we know nothing about, is also reduced accordingly. I hope this helps. Willard ----- Original Message ----- From: "Dan Heath" < danrh @ windstream .net> To: " KRnet " < krnet @ mylist .net> Sent: Sunday, February 12, 2012 12:36:16 PM Subject: RE: KR> Weight Testing Thanks, but what weight? What can be secured? Also, stall tests..... I don't do stalls. They scare the crap outa me. I bring it to the "mush" point and that is good enough for me. Again, the WHAT and HOW to secure it, is the issue that I cannot get an answer to, even from the RV community that we have here. See N64KR at http :// KRBuilder .org - Then click on the pics See you at the 2012 - KR Gathering in Mt. Vernon, Il ? MVN ? 40th Anniversary There is a time for building and it is over. Daniel R. Heath - Lexington, SC -----Original Message----- and secured with seat belts is not distributed the same as a passenger. _______________________________________ Search the KRnet Archives at http :// mylist .net/private/ krnet / to UNsubscribe from KRnet , send a message to KRnet -leave@ mylist .net please see other KRnet info at http :// www . krnet .org/info. html
