X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from EXHUB003-4.exch003intermedia.net ([207.5.74.111] verified) by logan.com (CommuniGate Pro SMTP 5.2.15) with ESMTPS id 3783620 for flyrotary@lancaironline.net; Tue, 28 Jul 2009 10:43:33 -0400 Received-SPF: none receiver=logan.com; client-ip=207.5.74.111; envelope-from=jwhaley@datacast.com Received: from EXVMBX003-5.exch003intermedia.net ([207.5.74.45]) by EXHUB003-4.exch003intermedia.net ([207.5.74.111]) with mapi; Tue, 28 Jul 2009 07:42:56 -0700 From: Jeff Whaley To: Rotary motors in aircraft Date: Tue, 28 Jul 2009 07:42:56 -0700 Subject: RE: [FlyRotary] Hot weather flight with Water Miisters for Oil Cooling Thread-Topic: [FlyRotary] Hot weather flight with Water Miisters for Oil Cooling Thread-Index: AcoPFQDV+kclqydGQNi7KDDc4OJmHgAe9Kmw Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_C03ABB0A7362B84BB53D544B3C305E0E01403665BD82EXVMBX0035e_" MIME-Version: 1.0 --_000_C03ABB0A7362B84BB53D544B3C305E0E01403665BD82EXVMBX0035e_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Dennis, I like your results but have a couple of questions. Where will the "permanent system" components be installed? Wing-root? Cabin= ? FFW? Combination? Do you have an estimated total weight of the temporary system components? Jeff From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Beh= alf Of Dennis Haverlah Sent: Monday, July 27, 2009 7:46 PM To: Rotary motors in aircraft Subject: [FlyRotary] Hot weather flight with Water Miisters for Oil Cooling Yesterday it was Hot Again in Central Texas - my EM-2 showed 103 deg F. I = flew my RV-7A to see how well my temporary water spray system would work. = I turned on the water spray just as I started my take-off. Water and oil t= emps at take-off were in the upper 170 F area. I normally take-off and cli= mb at 100 to 120 K/h to about 1000 feet before my oil temp approaches 220 F= . I than throttle back to 22 - 24 inches MP and continue my climb under re= duced power. The water usually gets to 200 F when the oil is at 220. (My= personal limits are 220 F-Oil and 212 F -water.) The test set-up provided= water spray on the oil cooler only and no water spray on the water radiato= r. During the climb the water and oil temps. tracked each other within 2 d= eg F.!! This meant the oil temp was reduced by at least 20 deg. F. I lef= t the engine at full throttle and climbed to 4000 feet while flying at 115 = to 120 kts. indicated. As I reached 4000 ft the water and oil were at 210 = - 211 F and climbing very slowly. Reviewing some of my other high temp. day flights it looks like I reduced m= y oil temp. 20 + degrees with the water mist spray. Time to take-off and c= limb was 5:10 minutes. I only used 8-9 oz. of water during the climb! Attached are pictures of the water system I used for the test. In the futu= re I may add one or two additional mister nozzles 3 to 4 inches to the righ= t of the 3 misters used on this test. (See attached pictures) The additi= onal mister nozzles would give me better coverage of the right side of the = oil cooler and also cool some of the water radiator surface. --_000_C03ABB0A7362B84BB53D544B3C305E0E01403665BD82EXVMBX0035e_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Dennis, I like your results but have a couple of question= s.

Where will the “permanent system” components be = installed? Wing-root? Cabin? FFW? Combination?

Do you have an estimated total weight of the temporary syste= m components?

Jeff

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Dennis Haverlah Sent: Monday, July 27, 2009 7:46 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Hot weather flight with Water Miisters for Oil Cooling

Yesterday it was Hot Ag= ain in Central Texas - my EM-2 showed 103 deg F. I flew my RV-7A to see how = well my temporary water spray system would work. I turned on the water spr= ay just as I started my take-off. Water and oil temps at take-off were i= n the upper 170 F area. I normally take-off and climb at 100 to 120 K/h to about 1000 feet before my oil temp approaches 220 F. I than throttle = back to 22 - 24 inches MP and continue my climb under reduced power. = The water usually gets to 200 F when the oil is at 220. (My personal limi= ts are 220 F-Oil and 212 F -water.) The test set-up provided water sp= ray on the oil cooler only and no water spray on the water radiator. During the climb the water and oil temps. tracked each other within 2 deg F= .!! This meant the oil temp was reduced by at least 20 deg. F. I l= eft the engine at full throttle and climbed to 4000 feet while flying at 115 to= 120 kts. indicated. As I reached 4000 ft the water and oil were at 210 - = 211 F and climbing very slowly.

Reviewing some of my other high temp. day flights it looks like I reduced m= y oil temp. 20 + degrees with the water mist spray. Time to take-off an= d climb was 5:10 minutes. I only used 8-9 oz. of water during the climb!

Attached are pictures of the water system I used for the test. In the future I may add one or two additional mister nozzles 3 to 4 inches to the right of the 3 misters used on this test. (See attached pictures) The additional mister nozzles would give me better coverage of the right side of the oil cooler and also cool some of the wate= r radiator surface.

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