X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=H+OlPNQi c=1 sm=1 tr=0 a=CfGu4IuVbUFoEaFtTlJPvg==:117 a=21gcaJef8zbaCGV4FGVwWA==:17 a=IkcTkHD0fZMA:10 a=x7bEGLp0ZPQA:10 a=CKeqCrOqW6IA:10 a=MeAgGD-zjQ4A:10 a=ob11AbtR5JFz1xNr6q4A:9 a=BFnuRUUMwIYk2LMG:21 a=ucd57crmegReZGMm:21 a=QEXdDO2ut3YA:10 From: "Stephen Izett stephen.izett@gmail.com" Received: from mail-pg1-f169.google.com ([209.85.215.169] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 13136116 for flyrotary@lancaironline.net; Sun, 03 Nov 2019 08:20:51 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.215.169; envelope-from=stephen.izett@gmail.com Received: by mail-pg1-f169.google.com with SMTP id 15so9514115pgt.7 for ; Sun, 03 Nov 2019 05:20:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:content-transfer-encoding:mime-version:subject:message-id:date :to; bh=oYgeBrJifopiJosEeXv2IK05mruY4fNgkc87BqzW74E=; b=BRS12Or+hvqTNHVt0NZoxP3TPcUWEtebttfqZjzWeSAZkHnMsHzPJ4N61wTFF689Hx PAI3hwUlGm9oHqVJjEzl4+L3MCnGputEmYgYr84dXNHvcoRbG58pvrEmFA6nKqzQGBGn fwDKzMG3Audl0i5vZEKY//hYZYSO3vyz1s8bY/7LZ1JwM/grT513uzHm1AXc04Znfc+f oBu2skYZHcJQmRYoG+eW9hREtrwLAb0OYntSmAHJ4ZJEKod2Gh1MwNw/VuTtqQId7GkQ Z9VUqNIk/zqWKjUepxf4TDlwIFeW21UhqjDCuF8N1XFFZyA02i2qXBH5NgNcKb/u0KcD hbdQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:content-transfer-encoding:mime-version :subject:message-id:date:to; bh=oYgeBrJifopiJosEeXv2IK05mruY4fNgkc87BqzW74E=; b=OBn+36gIcl+G4eoVFxkiG8H5pjqnEL004jrzjQwEBds7m+2TSXfPAFMTy4P7kYFMbi Wo/CTLegxFSTCU6EnOfCDN+BLdq3LW9HANrKbD0YmL84g7U3QxdoCDs6YpUFGIfiE3bR dewNYds2is+OB2qVBmHLGye7vzUdKcVE2xwFbgeZ7sg7krg+cyMMVu6B2/rC2MJpZl0R ZYV+2DD5qZ3DxePZ0++ul+9eyWqB+OdnX0mnkzcxQvGkNRtpjbLdsiFPveUxiyIF0nLT tXMEJEFpDQyTEvWboI1KtGLIa8X2Ttj+7S8iIJQ1C4ikzFrWQgrHIHVwZsAwT1+zzMav MiyA== X-Gm-Message-State: APjAAAXJVxMejNoGCa2TBxfPWHw5MBfbn4QUtTxF6hGLdbb3oZ6IA+ck lVyI4szBMyk7sNoNIrQnkbh2Fey5 X-Google-Smtp-Source: APXvYqx1TotlgT28FvJ+yY9hqOaX4J12SJZ+2isLQlZacQevGpcFq7i+MJPbRgpL9INkdFtYbysghw== X-Received: by 2002:a62:53:: with SMTP id 80mr26509838pfa.192.1572787232884; Sun, 03 Nov 2019 05:20:32 -0800 (PST) Return-Path: Received: from macbook-pro.lan ([118.209.180.176]) by smtp.gmail.com with ESMTPSA id a1sm12939984pjh.25.2019.11.03.05.20.31 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sun, 03 Nov 2019 05:20:32 -0800 (PST) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Subject: Update on Glasair Cooling in Phase #1 Message-Id: <7EDCE65A-955E-456C-831E-656841FE65E4@gmail.com> Date: Sun, 3 Nov 2019 21:20:29 +0800 To: Rotary motors in aircraft X-Mailer: Apple Mail (2.3445.104.11) Hi there people Over the past month I have updated the cooling system of the Glasair = Super II RG in order to continue our phase 1 testing. The previous setup had 540in3 two pass behind the ~20in2 unmodified = right cheek inlet. We hadn=E2=80=99t included the left cheek as it was so difficult to get = the air across to the right hand side diffuser. The Oil is 250in3 behind a 8in2 under spinner inlet. Initial testing was marginal with OAT below 20C (68F) So having established that cooling was rather marginal above 68F I went = for the planned upgrade path which included installing a secondary bike radiator of 130in3 plumbed into the heater = circuit behind the ~15in2 left cheek inlet. The diffuser was designed to hopefully be more efficient in a climb = configuration. So the total radiators frontal area has been increased by 50% while the = air in has increased 75%. The unknown is that being in the heater circuit we don't know the total = flow through the secondary rad compared with the primary rad. Testing on the ground yield an approx 15-20C drop in coolant after = 30mins of 1800rpm idle. Flight Testing Results the next day: OAT 21C (70F) Coolant Temps max=E2=80=99d on climb at 93C (200F) down 15C on highest = Flight 3 climb temp with a 4C higher OAT. Coolant Temps dropped to 83C (181F) as speed got to 147 KIAS (Cruise is = published as 192 KIAS but we haven=E2=80=99t expanded the envelope to = date) I=E2=80=99m very pleased with this result. Oil Temps are high. I would much prefer them below 80C (176F) I=E2=80=99ll be interested to see what oil temp does as speed rises, but = my hunch is it needs more air (increase air to oil cooler from a = diameter of 77mm to 100mm) Slow Speed Tests: Vs Clean Stall is at 67 KIAS row 2011 (Glasair claims 70 Knots at Gross) Vso Full Flap Stall is at 57 KIAS row 2062 & 2083 (Glasair claims 59 = Knots at Gross) Cheers Steve Izett Perth Western Australia