X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [69.171.58.236] (account marv@lancaironline.net) by logan.com (CommuniGate Pro WebUser 5.0.9) with HTTP id 1129924 for lml@lancaironline.net; Sat, 27 May 2006 01:51:18 -0400 From: "Marvin Kaye" Subject: Re: [LML] Re: turbines over temps & rpm To: lml X-Mailer: CommuniGate Pro WebUser v5.0.9 Date: Sat, 27 May 2006 01:51:18 -0400 Message-ID: In-Reply-To: References: X-Priority: 3 MIME-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1"; format="flowed" Content-Transfer-Encoding: 8bit Posted for "Maurits" : Barney, We have changed the software so it would not count the occasional spike caused by the tachgen as an event during the initial testing development of the TSLM and with the over 40 planes flying with the TSLM have not had any complaints. We have downloads showing Lancairs with significant over temps , N2 in excess of 2080 rpm by as much as 300 plus rpm and over torque during test flights for a couple of seconds at a time and usually the over temp , over speed and over torque happens simultaneously. According to our customers these over temps are done by various pilots including Lancair test pilots. Diemech Turbines has this data recorded on file, in most cases Diemech Turbines found it necessary to open up engines to repair the damage. It is also important to note that with regards to using the 84 inch prop especially over speeding the N2 on landing on a short strip at high elevation with a Lancair IV T that you have Beta Limiting activated in the configuration and wired up, as you can easily exceed 1900 RPM ( Walter Manual ) in Beta / Reverse during landing. It has been demonstrated on a plane with a 99 inch prop as well. Regards, Maurits