---------------------------------------------------------- TeamGrumman-List Digest Archive --- Total Messages Posted Wed 08/12/15: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:51 AM - Re: Hello... out there. Story time. (Richard) ________________________________ Message 1 _____________________________________ Time: 10:51:15 AM PST US From: Richard Subject: RE: TeamGrumman-List: Hello... out there. Story time. They call it de-rating. Richard > Subject: Re: TeamGrumman-List: Hello... out there. Story time. > To: teamgrumman-list@matronics.com > From: flying-nut@cfl.rr.com > Date: Tue=2C 11 Aug 2015 21:11:14 -0400 > om> > > On 8/11/2015 8:24 PM=2C Dj Merrill wrote: > > > > On 8/11/2015 3:36 PM=2C Gary L Vogt wrote: > >> There is nothing magic about the 2400 hour TBO. > > > > In reality "TBO" is something of a misnomer. It is pretty rare for an > > engine to make it all the way to the published "Time Before Overhaul" > > time without having at least one partial overhaul (top end) done along > > the way. > > > > -Dj > > > I'm going to disagree ..... kinda. I've had three engines=2C O-235=2C > O-320=2C and O-360 that went quite a ways beyond that 2400 TBO without > even a top. All you have to do is fly them often=2C change the oil (I do > every 25 hours) and keep the plugs in good shape. Let them sit for > months without running and I'd say those engines won't make TBO. > > I was having a discussion with a Lycoming engineer about the O-360 in my > Pitts. He kept saying 'you can't do that' over and over. High test auto > fuel and 3300 RPMs weren't within the limits! Finally=2C he went 'off the > record' and I learned a great deal. Almost all the 'limits' (RPM=2C type > of fuel=2C TBO etc=2C) are there so the engine will pass certification. The > limits are conservative because failure during certification is hugely > expensive and just not an option. > Linn > > =========== =========== =========== =========== > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message teamgrumman-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/TeamGrumman-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/teamgrumman-list Browse Digests http://www.matronics.com/digest/teamgrumman-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.