Brodhead Pietenpol Association

Original Posted By: Michael Groah
Mark asked->Do you know what the negative-G stress loading is on a pietI'm not aeronautical engineer and I didn't sleep in a Holiday Innlast night, but my napkin sketches and calcs indicate that negativeG loading is a weak point of the Piet structure. I may also bevery mistaken when I write this, but I believe one of the few knownstructural failures of a Piet was when one fell out of a loop or attempted a negative-G maneuver and the struts collapsed.Normal category loading for certified aircraft is +3.8 and -1.52Gand the Piet is certainly no better rated than that, IMHO.Oscar ZunigaAir Camper NX41CCMedford, OR ________________________________________________________________________________

Original Posted By: mark lee
We've been doing it the first Saturday in June. It would be awesome if you couldcome. In 2010 we were blessed with a visit from Markle. A visit from Oscarin 2012 would be a great addition to our visits from the all-stars. Mike GroahSent from my iPhoneOn Jun 15, 2011, at 8:37 PM, Oscar Zuniga wrote:> > > Any tentative dates set for the 2012 Frazier Lake event yet?> It's only about six hours south of me. Maybe a chance I can> fly 41CC down there next spring, after I get the airplane ferried> up here to Oregon later this summer.> > Oscar Zuniga> Air Camper NX41CC "Scout"> Flying Squirrel N2069Z "Rocket"> Medford, OR (soon to be Eagle Point, Oregon)> website at http://www.flysquirrel.net > > > > ________________________________________________________________________________Date: Wed, 15 Jun 2011 21:48:12 -0700Subject: Re: Pietenpol-List: negative G loading for Piet wing

Original Posted By: owner-pietenpol-list-server(at)matronics.com
That story about a Piet that lost its wing trying to do a loop was used byBHP to explain why Jury Struts should be installed on a Pietenpol. NegativeG loading will cause the lift struts to buckle if they are not braced nearthe midpoint with Jury Struts.I've never done anything more violent that a wingover in mine. A Pietenpoljust would not be a good aerobatic platform - too slow a roll rate and waytoo much drag. If you want to build an aerobatic airplane, build a Pitts.Jack PhillipsNX899JP "Icarus Plummet"Smith Mountain Lake, Virginia-----Original Message-----