X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from QMTA10.emeryville.ca.mail.comcast.net ([76.96.30.17] verified) by logan.com (CommuniGate Pro SMTP 5.2.15) with ESMTP id 3791481 for flyrotary@lancaironline.net; Sat, 01 Aug 2009 12:18:43 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.30.17; envelope-from=hoursaway1@comcast.net Received: from OMTA15.emeryville.ca.mail.comcast.net ([76.96.30.71]) by QMTA10.emeryville.ca.mail.comcast.net with comcast id P3GH1c0031Y3wxoAA4J9KZ; Sat, 01 Aug 2009 16:18:09 +0000 Received: from sz0081.ev.mail.comcast.net ([76.96.26.137]) by OMTA15.emeryville.ca.mail.comcast.net with comcast id P4J81c0062xV6SL8b4J8PD; Sat, 01 Aug 2009 16:18:08 +0000 Date: Sat, 1 Aug 2009 16:18:08 +0000 (UTC) From: hoursaway1@comcast.net To: Rotary motors in aircraft Message-ID: <124310750.7329571249143488685.JavaMail.root@sz0081a.emeryville.ca.mail.comcast.net> In-Reply-To: Subject: Re: [FlyRotary] Re: Hot weather flight with Water Miisters for Oil Cooling MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_362516_1467226693.1249143488684" X-Originating-IP: [76.20.141.85] X-Mailer: Zimbra 5.0.16_GA_2927.RHEL5_64 (ZimbraWebClient - IE6 (Win)/5.0.16_GA_2927.RHEL5_64) ------=_Part_362516_1467226693.1249143488684 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Dennis;=C2=A0 Do your temps increase to the high #s with WOT in level fligh= t also or just climb configuration, possible airflow prob. into inlet at hi= gh angle of attack, am curious because I have noticed inlets on other flyin= g aircraft are angled/offset upper & lower with lower lip sticking out fart= her than upper lip, does not look as good but if this cures the problem? I = have made some minor changes in our cowl inlet to oil cooler because of wha= t I noticed, we have not flown the aircraft yet & the cowl was not painted = so changes can still be done with not much work,=C2=A0 just a note/ observa= tion .=C2=A0 Need to be flying (any second now-any second).=C2=A0=C2=A0=C2= =A0 David Cook=C2=A0 RV6A=C2=A0 Rotary.=20 ----- Original Message -----=20 From: "Jeff Whaley " < jwhaley @ datacast .com>=20 To: "Rotary motors in aircraft" < flyrotary @ lancaironline .net>=20 Sent: Tuesday, July 28, 2009 10:42:56 AM GMT -05:00 US/Canada Eastern=20 Subject: [ FlyRotary ] Re: Hot weather flight with Water Miisters for Oil C= ooling=20 Hi Dennis, I like your results but have a couple of questions.=20 Where will the =E2=80=9Cpermanent system=E2=80=9D components be installed? = Wing-root? Cabin? FFW? Combination?=20 Do you have an estimated total weight of the temporary system components?= =20 Jeff=20 From: Rotary motors in aircraft [mailto: flyrotary @ lancaironline .net] On= Behalf Of Dennis Haverlah=20 Sent: Monday, July 27, 2009 7:46 PM=20 To: Rotary motors in aircraft=20 Subject: [ FlyRotary ] Hot weather flight with Water Miisters for Oil Cooli= ng=20 Yesterday it was Hot Again in Central Texas - my EM-2 showed 103 deg F.=C2= =A0 I flew my RV-7A to see how well my temporary water spray system would w= ork.=C2=A0 I turned on the water spray just as I started my take-off.=C2=A0= Water and oil temps at take-off were in the upper 170 F area.=C2=A0 I norm= ally take-off and climb at 100 to 120 K/h to about 1000 feet before my oil = temp approaches 220 F.=C2=A0 I than throttle back to 22 - 24 inches MP and = continue my climb under reduced power.=C2=A0=C2=A0 The water usually gets t= o 200 F when the oil is at 220.=C2=A0 (My personal limits are 220 F-Oil and= 212 F -water.)=C2=A0 The test set-up provided water spray on the oil coole= r only and no water spray on the water radiator .=C2=A0 During the climb th= e water and oil temps. tracked each other within 2 deg F.!! =C2=A0 This mea= nt the oil temp was reduced by at least 20 deg. F.=C2=A0 I left the engine = at full throttle and climbed to 4000 feet while flying at 115 to 120 kts. i= ndicated.=C2=A0 As I reached 4000 ft the water and oil were at 210 - 211 F = and climbing very slowly.=20 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.=C2=A0 Time to take-off = and climb was 5:10 minutes.=C2=A0 I only used 8-9 oz. of water during the c= limb!=C2=A0=20 Attached are pictures of the water system I used for the test.=C2=A0 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.=C2=A0 (See attached pictures)=C2= =A0=C2=A0 The additional mister nozzles would give me better coverage of th= e right side of the oil cooler and also cool some of the water radiator sur= face.=20 ------=_Part_362516_1467226693.1249143488684 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <= div style=3D'font-family: Arial; font-size: 12pt; color: #000000'>Dennis;&n= bsp; Do your temps increase to the high #s with WOT in level flight also or= just climb configuration, possible airflow prob. into inlet at high angle = of attack, am curious because I have noticed inlets on other flying aircraf= t are angled/offset upper & lower with lower lip sticking out farther t= han upper lip, does not look as good but if this cures the problem? I have = made some minor changes in our cowl inlet to oil cooler because of what I n= oticed, we have not flown the aircraft yet & the cowl was not painted s= o changes can still be done with not much work,  just a note/observati= on.  Need to be flying (any second now-any second).    = David Cook  RV6A  Rotary.
----- Original Message -----
From= : "Jeff Whaley" <jwhaley@datacast.com>
To: "Rotary motors in aircr= aft" <flyrotary@lancaironline.net>
Sent: Tuesday, July 28, 2009 10= :42:56 AM GMT -05:00 US/Canada Eastern
Subject: [FlyRotary] Re: Hot weat= her flight with Water Miisters for Oil Cooling

Hi Dennis, I like your results but have a co= uple of questions.

Where will the =E2=80=9Cpermanent system=E2= =80=9D components be installed? Wing-root? Cabin? FFW? Combination?<= /P>

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

Jeff

 

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

 

Yesterday it was Hot Aga= in in Central Texas - my EM-2 showed 103 deg F.  I flew my RV-7A to se= e how well my temporary water spray system would work.  I turned on th= e water spray just as I started my take-off.  Water and oil temps at t= ake-off were in the upper 170 F area.  I normally take-off and climb a= t 100 to 120 K/h to about 1000 feet before my oil temp approaches 220 F.&nb= sp; I than throttle back to 22 - 24 inches MP and continue my climb under r= educed power.   The water usually gets to 200 F when the oil is a= t 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 sp= ray on the water radiator.  During the climb the water and oil tem= ps. 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 an= d 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 s= lowly.

Reviewing some of my other high temp. day flights it looks l= ike I reduced my oil temp. 20 + degrees with the water mist spray.  Ti= me to take-off and climb was 5:10 minutes.  I only used 8-9 oz. of wat= er during the climb! 

Attached are pictures of the water syste= m 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 tes= t.  (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.

------=_Part_362516_1467226693.1249143488684--