In November 1977 the New Zealand Civil Aviation Division (as it was known then) published a set of hand-written notes by one of their engineers (Mr H O Ewart) describing the load testing required to clear NZ examples of the KR aircraft for flight in this country.
Interestingly, Hugh Ewart's figures for the KR-2 were bases upon a "brochure for KR2 states design stress loading 7g at 800lb." My later brochure states 900lb for the KR2 MAUW. In any case, proof testing of the wing was required and a loading schedule was described for limit loads of both 3.8g and 6g for both KR aircraft (1 & 2), and all New Zealand examples of that era were accordingly tested. Some of those aeroplanes are still flying today. As mentioned in another post, in 1998 the UK PFA commented that there was no stress analysis available from Rand Robinson for the KR2S so a builder engaged aeronautical engineer Mike Whittaker to carry out such an analysis so that the design could be cleared in the UK. Mike's work highlighted the need for several modifications to the structure given that the UK PFA would not approve an increase in MAUW above 900lb for either KR2/KR2S without them. That was simply the position of the UK 'authority' governing homebuilt aeroplanes - many successful examples remain flying worldwide. Nga mihi Kiwi ________________________________ From: KRnet <krnet-boun...@list.krnet.org> on behalf of Terry Williams via KRnet <krnet@list.krnet.org> Sent: Saturday, 30 July 2022 06:50 To: krnet@list.krnet.org <krnet@list.krnet.org> Cc: Terry Williams <7ecapi...@comcast.net> Subject: KRnet> Load testing of the KR2S and variants Have there been any load analyzes done with regard to the changes made with the KR2S and KR2S-mod (M. Langford, et. al.). I like what I read about the changes, but I wonder if anyone has load tested the new structures and published the results. Would the KR2S (and others) sustain +6g or -3g loads. At what weights, etc.? Just curious, Thanks, -Terry -- KRnet mailing list KRnet@list.krnet.org https://list.krnet.org/mailman/listinfo/krnet
-- KRnet mailing list KRnet@list.krnet.org https://list.krnet.org/mailman/listinfo/krnet
