Return-Path: Received: from slkcpop2.slkc.uswest.net ([206.81.128.2]) by truman.olsusa.com (Post.Office MTA v3.5.1 release 219 ID# 0-64832U3500L350S0V35) with SMTP id com for ; Sat, 26 Feb 2000 11:40:16 -0500 Received: (qmail 43600 invoked by alias); 26 Feb 2000 00:45:15 -0000 Received: (qmail 43595 invoked by uid 0); 26 Feb 2000 00:45:15 -0000 Received: from pppdsla233.slkc.uswest.net (HELO scottdah) (216.160.232.233) by slkcpop2.slkc.uswest.net with SMTP; 26 Feb 2000 00:45:15 -0000 Delivered-To: fixup-lancair.list@olsusa.com@fixme From: "Scott & Paula Dahlgren" To: "___Lancair list" Subject: eagle engines Date: Fri, 25 Feb 2000 17:49:04 -0700 Message-ID: <009201bf7ff3$478f0900$0200000a@scottdah> Importance: Normal X-Mailing-List: lancair.list@olsusa.com Mime-Version: 1.0 <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> << Lancair Builders' Mail List >> <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> >> just an note on the American eagle engines. the crankshafts on these engines are listed as having a tensile strength in the 270,00 psi range. this figure is well into the notch sensitivity (brittle) range. It would be interesting to find out why they were tempered so high. I know grade 8 bolts are not allowed in aircraft for the same reason, they are too brittle. 125-150 ski alloy steel is typically what is used for high strength aircraft bolts. something worth asking about I wonder. Scott >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> 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. >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>