The Australian authorities approved an increase in gross from 900lbs to 1200lb (500kg) some time ago when KR's were being built under "amateur-built" legislation and not "experimental". Someone must have submitted engineering justification to justify the increase or it would not have been approved. I don't know the details however. KR's are often flown over 900lbs...it is the CoG that is more important. A rule of thumb is to reduce the design loading by 1G for every 100lb over gross. There was a thread on the group about this that would be available on the archives. It was to do with just which part of the airframe would be the weakest......I think people concluded it would be the pilot himself :-). The KR is a very strong beast when built to plans.
John and Janet Martindale 29 Jane Circuit TOORMINA NSW 2452 AUSTRALIA ph: 61 2 6658 4767 email: johnj...@chc.net.au ----- Original Message ----- From: <jsmon...@aol.com> To: <kr...@mylist.net> Sent: Wednesday, June 18, 2003 11:36 PM Subject: Re: KR>Performance > John - I am thinking about building a KR-2 and the gross weight listed is > 900 lbs... you mentioned 1200 lbs. One of my concerns was the low gross weight > listed. What did you do to get the gross weight up to 1200 lbs? > > Thanks, > John S. Monday > jsmon...@aol.com > _______________________________________________ > see KRnet list details at http://www.krnet.org/instructions.html >
