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From: larry howell via KRnet Sent: Monday, 16 October 2017 2:50 PM To: KRnet Cc: larry howell Subject: Re: KR> Mods for preventing flat spins in the kr Wasn’t it Icon that stalled or spun in during a turn that killed their company top test pilot and one of the engineers? Larry H > On Oct 15, 2017, at 1:35 PM, svd via KRnet <krnet@list.krnet.org> wrote: > > Icon Aircraft wing design was the first production aircraft to comply > completely with FAA spin resistance standards. Its t-tail gives it spin > recovery (and helps with the high center of thrust issue), but spin > resistance is more an issue of wing and fuselage design: > > https://www.google.com/patents/US20140021302 > <https://www.google.com/patents/US20140021302> > > In Icon’s case, wing cuff with airfoil changes and wingtip, funnel airflow > over the ailerons. > > I would suggest that the easiest changes for the KR would be: > Spin avoidance / resistance: > 1) sight line AOA (to help keep you away from stall). > 2) Stall fence between wing stub and outer panel. > 3) Stall strip on inner wing stub > 4) VG’s on outer 1/3 of wings. > > Spin Recovery: > 1) VG’s on rudder bellow stabilizer. > 2) Increase rudder area below stabilizer > > We will probably incorporate or test all of these mods, but won’t be flying > until summer at the earliest. > > Cheers, > Owen > > _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
