Return-Path: Received: from mail.rdc1.sfba.home.com ([24.0.0.67]) by truman.olsusa.com (Post.Office MTA v3.5.1 release 219 ID# 0-64832U3500L350S0V35) with ESMTP id com for ; Mon, 17 Jan 2000 01:02:18 -0500 Received: from home.com ([24.12.53.23]) by mail.rdc1.sfba.home.com (InterMail v4.01.01.00 201-229-111) with ESMTP id <20000117060723.XDSL25586.mail.rdc1.sfba.home.com@home.com> for ; Sun, 16 Jan 2000 22:07:23 -0800 Message-ID: <3882B268.6EDE6CE9@home.com> Date: Sun, 16 Jan 2000 22:10:48 -0800 From: Theo Mulder Organization: @Home Network To: lancair.list@olsusa.com Subject: LNC4 CHT and EGT data References: <20000116053208.AAA5790@truman.olsusa.com> X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> I have heard much opinion and folklore about recommended leaning for the TSIO550-E1B so I have some data to present and request similar data from other LNC4 owners to see if these numbers are typical for a engine with more than 50 hours. (This one has 65 hours TT) Based on discussions with Orin at Lancair during my IV checkout and from reading the book EGT Systems from Light Plane maintenance the following guidelines were established. Maximum EGT/TIT: 1550F for any RPM/MAN setting. Minimum RPM: 2500 with Manifold Press. > 30" The following data was taken at 65% power with a Vision Micro Systems engine monitoring system. RPM: 2400 MAN: 28.5" OAT: -8C ALT: 17500ft 20.7 GPH (Rich of Peak) 15.3v GPH (Lean of Peak) EGT1 1518 F 1544 F EGT2 1564 1564 EGT3 1518 1552 EGT4 1530 1515 EGT5 1454 1508 EGT6 1462 1478 CHT1 322 294 CHT2 328 285 CHT3 308 278 CHT4 332 278 CHT5 332 298 CHT6 332 278 Air Speed Data from Shadin air data computer. TAS 262 Kts 245 Kts. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ RPM: 2400 MAN: 28.2" OAT: -30C ALT: 25000ft 21.2 GPH (Rich of Peak) 15.0v GPH (Lean of Peak) EGT1 1515 1526 EGT2 1552 1564 EGT3 1515 1536 EGT4 1524 1508 EGT5 1440 1490 EGT6 1460 1478 CHT1 336 270 CHT2 344 270 CHT3 324 270 CHT4 336 260 CHT5 344 288 CHT6 330 270 Air Speed Data from Shadin air data computer. TAS 296 Kts 273 Kts. This date has been found to be very typical of the engine at this time with the EGT/TIT limitations listed above. The EGT temperatures have been found to be the limiting case and not the TIT. The maximum TIT is typically the same or less than the maximum EGT on cylinder #2 at the 65% power setting. The minimum power setting normally used is 65%. Theo Mulder. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> LML website: http://www.olsusa.com/Users/Mkaye/maillist.html Builders' Bookstore: http://www.buildersbooks.com/lancair Please send your photos and drawings to marvkaye@olsusa.com. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>