X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from rv-out-0506.google.com ([209.85.198.229] verified) by logan.com (CommuniGate Pro SMTP 5.2.15) with ESMTP id 3782979 for flyrotary@lancaironline.net; Mon, 27 Jul 2009 20:05:25 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.198.229; envelope-from=wdleonard@gmail.com Received: by rv-out-0506.google.com with SMTP id b25so934502rvf.7 for ; Mon, 27 Jul 2009 17:04:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=m/WF8Rspyr7wEP0Ti+qDkhW2ipSA72+OBGMp0jXEFxo=; b=XI8fTn7joMMa3qIA/5V1GK/ghX4p/CZ0hwOBV36cLGp+Qa9iiZXhCEPHvTRPEK2FpF MduUYN3o1Au0vIGBq1m19k6XX4x756PCM473XTSwUc+f8MGSQZWFl5qcpSNRBsPNA5P7 XmGkb7u9VzUWL1PspCVwRAa6DKp0k4PxZP540= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=D4n9j4+4T4QozaBqoAqvvvhIIrctVfGO8DLKbnzc5edzUhXAUdMQkaK/LUiqvmbLh5 wyuZKnL2CLfYJVLwl5N/8osudZsx9PdWOSoJ5wp8rWCdJXJZsuN9Nrfu23DPkIwmO6WJ /5Sh9a6y1pusa9OUGIN0SgWb+TLqaLeD6u424= MIME-Version: 1.0 Received: by 10.140.191.3 with SMTP id o3mr4220403rvf.91.1248739490117; Mon, 27 Jul 2009 17:04:50 -0700 (PDT) In-Reply-To: References: Date: Mon, 27 Jul 2009 17:04:50 -0700 Message-ID: <1c23473f0907271704s4b110137va2fd4e73abaa2dfa@mail.gmail.com> Subject: Re: [FlyRotary] Hot weather flight with Water Miisters for Oil Cooling From: David Leonard To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=000e0cd14708b9bb61046fb8d177 --000e0cd14708b9bb61046fb8d177 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Nice Job!! -- David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net On Mon, Jul 27, 2009 at 4:46 PM, Dennis Haverlah wrote: > 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 > temps at take-off were in 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 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 > 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 left 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 > my oil temp. 20 + degrees with the water mist spray. Time to take-off and > 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 water radiator surface. > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > --000e0cd14708b9bb61046fb8d177 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Nice Job!!
=A0
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David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net


On Mon, Jul 27, 2009 at 4:46 PM, Dennis Haverlah= <cloudust= er@austin.rr.com> wrote:
Yesterday it was Hot Again in Cen= tral Texas - my EM-2 showed 103 deg F.=A0 I flew my RV-7A to see how well m= y temporary water spray system would work.=A0 I turned on the water spray j= ust as I started my take-off.=A0 Water and oil temps at take-off were in th= e upper 170 F area.=A0 I normally take-off and climb at 100 to 120 K/h to a= bout 1000 feet before my oil temp approaches 220 F.=A0 I than throttle back= to 22 - 24 inches MP and continue my climb under reduced power.=A0=A0 The = water usually gets to 200 F when the oil is at 220.=A0 (My personal limits = are 220 F-Oil and 212 F -water.)=A0 The test set-up provided water spray= on the oil cooler only and no water spray on the water radiator.=A0 Du= ring the climb the water and oil temps. tracked each other within 2 deg F.!= ! =A0 This meant the oil temp was reduced by at least 20 deg. F.=A0 I left = the engine at full throttle and climbed to 4000 feet while flying at 115 to= 120 kts. indicated.=A0 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 reduc= ed my oil temp. 20 + degrees with the water mist spray.=A0 Time to take-off= and climb was 5:10 minutes.=A0 I only used 8-9 oz. of water during the cli= mb!=A0

Attached are pictures of the water system I used for the test.=A0 In th= e future I may add one or two additional mister nozzles 3 to 4 inches to th= e right of the 3 misters used on this test.=A0 (See attached pictures)=A0= =A0 The additional mister nozzles would give me better coverage of the righ= t side of the oil cooler and also cool some of the water radiator surface.<= br>


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