X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from hub026-NJ-5.exch026.serverdata.net ([206.225.166.168] verified) by logan.com (CommuniGate Pro SMTP 6.0.8) with ESMTPS id 6743909 for flyrotary@lancaironline.net; Fri, 21 Feb 2014 16:44:55 -0500 Received-SPF: none receiver=logan.com; client-ip=206.225.166.168; envelope-from=jwhaley@datacast.com Received: from MBX026-E1-NJ-2.exch026.domain.local ([10.240.14.52]) by HUB026-NJ-5.exch026.domain.local ([10.240.14.42]) with mapi id 14.03.0174.001; Fri, 21 Feb 2014 13:44:19 -0800 From: Jeff Whaley To: Rotary motors in aircraft Subject: Re: [Fly Rotary] Vortex Generator in air duct Thread-Topic: Re: [Fly Rotary] Vortex Generator in air duct Thread-Index: Ac8vThIwq/5bapbPRb+p8/erF8zZwA== Date: Fri, 21 Feb 2014 21:44:17 +0000 Message-ID: <234B758DE9A64449BEB6BB5D1345CA7A36158CB4@mbx026-e1-nj-2.exch026.domain.local> Accept-Language: en-CA, en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-originating-ip: [209.87.232.162] Content-Type: multipart/related; boundary="_005_234B758DE9A64449BEB6BB5D1345CA7A36158CB4mbx026e1nj2exch_"; type="multipart/alternative" MIME-Version: 1.0 --_005_234B758DE9A64449BEB6BB5D1345CA7A36158CB4mbx026e1nj2exch_ Content-Type: multipart/alternative; boundary="_000_234B758DE9A64449BEB6BB5D1345CA7A36158CB4mbx026e1nj2exch_" --_000_234B758DE9A64449BEB6BB5D1345CA7A36158CB4mbx026e1nj2exch_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable All improvements are good; however, you can expect a 1:1 degree rise in you= r operating temperatures relative to ambient air temperature. If 185F is the cruise result on a 40F day - you should expect 245F in cruis= e if the air temperature reaches 100F. In other words, you're not quite th= ere yet; winter is an excellent time to experiment with a liquid-cooled eng= ine as there is little chance of overheating. Realistically, if you want <= 200F oil temperature at 100F you need to see <140F oil temperature wit OAT = 40F. It is not easy to design for both ends of the spectrum ... Jeff From: shipchief@aol.com Subject: Vortex Generator in air duct Date: Sun, 16 Feb 2014 19:46:08 -0500 (EST) To: flyrotary@lancaironline.net [Message Header] [Undecoded Message] I was discussing the first few flights with some friends at the airplane a = few weeks ago, and mentioned the oil temp had reached 200F after climbing 3= 500 feet from take off. That was on a sub 40F day. My oil cooler lays fore and aft along the right cowl cheek, and all the air= from the right cowl inlet serves this cooler. I built a nice divergent duc= t back to it, where the air must turn down and make a 90 degree turn to pas= s thru the cooler element. then it meets a louvered cover where the air tur= ns aft 90 degrees to re-enter the free stream outside. When looking into the mouth of the duct, you can see the aft third of the c= ooler. Bob K a retired Boeing flight test engineer suggested I put a vortex gener= ator in the oil cooler duct to pull the air down along the divergent floor. So I did! I made a "Hall" type vortex generator, right out of a picture in = the Aircraft Spruce catalog, and stuck it into the center of the duct floor= , at the start of the divergent part. I bent it up out of a scrap of .025" = aluminum and stuck it in place with double sided carpet tape. On my next flight, I noticed cooler oil temps generally, and specifically, = no temps near 200F during the initial climb to 4000 feet where I have been = doing most of my early testing. Cruise temps run about 185F. We'll see what= happens as the weather gets warmer. This message, and the documents attached hereto, is intended only for the a= ddressee and may contain privileged or confidential information. Any unauth= orized disclosure is strictly prohibited. If you have received this message= in error, please notify us immediately so that we may correct our internal= records. Please then delete the original message. Thank you. --_000_234B758DE9A64449BEB6BB5D1345CA7A36158CB4mbx026e1nj2exch_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

All improvements are good; however, you can expect a= 1:1 degree rise in your operating temperatures relative to ambient air tem= perature.

If 185F is the cruise result on a 40F day – yo= u should expect 245F in cruise if the air temperature reaches 100F.  I= n other words, you’re not quite there yet; winter is an excellent tim= e to experiment with a liquid-cooled engine as there is little chance of overheating.  Realistically, if you want <200F= oil temperature at 100F you need to see <140F oil temperature wit OAT 4= 0F.  It is not easy to design for both ends of the spectrum …

Jeff

 

From:

shipchief@aol.com<= /p>

Subject:

Vortex Generator in air duct

Date:

Sun, 16 Feb 2014 19:46:08 -0500 (EST= )

To:

flyrotary@lancaironline.net

3D"Message

I was discussing the first fe= w flights with some friends at the airplane a few weeks ago, and mentioned = the oil temp had reached 200F after climbing 3500 feet from take off. That was on a sub 40F day.

My oil cooler lays fore and a= ft along the right cowl cheek, and all the air from the right cowl inlet se= rves this cooler. I built a nice divergent duct back to it, where the air must turn down and make a 90 degree turn to pass thru th= e cooler element. then it meets a louvered cover where the air turns a= ft 90 degrees to re-enter the free stream outside.

When looking into the mouth o= f the duct, you can see the aft third of the cooler.

 Bob K a retired Boeing = flight test engineer suggested I put a vortex generator in the oil cooler d= uct to pull the air down along the divergent floor.

So I did! I made a "= ;Hall" type vortex generator, right out of a picture in the Aircraft S= pruce catalog, and stuck it into the center of the duct floor, at the start of the divergent part. I bent it up out of a scrap of .025" aluminum = and stuck it in place with double sided carpet tape.

On my next flight, I noticed = cooler oil temps generally, and specifically, no temps near 200F during the= initial climb to 4000 feet where I have been doing most of my early testing. Cruise temps run about 185F. We'll see what happens a= s the weather gets warmer.

 

This message, and the documents attached hereto, is intended only for the a= ddressee and may contain privileged or confidential information. Any unauth= orized disclosure is strictly prohibited. If you have received this message= in error, please notify us immediately so that we may correct our internal records. Please then delete the origin= al message. Thank you. --_000_234B758DE9A64449BEB6BB5D1345CA7A36158CB4mbx026e1nj2exch_-- --_005_234B758DE9A64449BEB6BB5D1345CA7A36158CB4mbx026e1nj2exch_ Content-Type: image/gif; name="image001.gif" Content-Description: image001.gif Content-Disposition: inline; filename="image001.gif"; size=849; creation-date="Fri, 21 Feb 2014 21:44:17 GMT"; modification-date="Fri, 21 Feb 2014 21:44:17 GMT" Content-ID: Content-Transfer-Encoding: base64 R0lGODdhCgANAPcAAAAAAIAAAACAAICAAAAAgIAAgACAgMDAwMDcwKbK8AAAAAAAKgAAVQAAfwAA qgAA1AAqAAAqKgAqVQAqfwAqqgAq1ABVAABVKgBVVQBVfwBVqgBV1AB/AAB/KgB/VQB/fwB/qgB/ 1ACqAACqKgCqVQCqfwCqqgCq1ADUAADUKgDUVQDUfwDUqgDU1CoAACoAKioAVSoAfyoAqioA1Coq ACoqKioqVSoqfyoqqioq1CpVACpVKipVVSpVfypVqipV1Cp/ACp/Kip/VSp/fyp/qip/1CqqACqq KiqqVSqqfyqqqiqq1CrUACrUKirUVSrUfyrUqirU1FUAAFUAKlUAVVUAf1UAqlUA1FUqAFUqKlUq VVUqf1UqqlUq1FVVAFVVKlVVVVVVf1VVqlVV1FV/AFV/KlV/VVV/f1V/qlV/1FWqAFWqKlWqVVWq f1WqqlWq1FXUAFXUKlXUVVXUf1XUqlXU1H8AAH8AKn8AVX8Af38Aqn8A1H8qAH8qKn8qVX8qf38q qn8q1H9VAH9VKn9VVX9Vf39Vqn9V1H9/AH9/Kn9/VX9/f39/qn9/1H+qAH+qKn+qVX+qf3+qqn+q 1H/UAH/UKn/UVX/Uf3/Uqn/U1KoAAKoAKqoAVaoAf6oAqqoA1KoqAKoqKqoqVaoqf6oqqqoq1KpV AKpVKqpVVapVf6pVqqpV1Kp/AKp/Kqp/Vap/f6p/qqp/1KqqAKqqKqqqVaqqf6qqqqqq1KrUAKrU KqrUVarUf6rUqqrU1NQAANQAKtQAVdQAf9QAqtQA1NQqANQqKtQqVdQqf9QqqtQq1NRVANRVKtRV VdRVf9RVqtRV1NR/ANR/KtR/VdR/f9R/qtR/1NSqANSqKtSqVdSqf9SqqtSq1NTUANTUKtTUVdTU f9TUqtTU1AAAAAwMDBkZGSYmJjMzMz8/P0xMTFlZWWZmZnJycn9/f4yMjJmZmaWlpbKysr+/v8zM zNjY2OXl5fLy8v/78KCgpICAgP8AAAD/AP//AAAA//8A/wD//////ywAAAAACgANAAAINgDxCRw4 EAC+fwgTIjT4DwCAAwIXHlSYkKHDhxEZUpTYEONEjRstOoR4ECRFkSQ5bux4saXDgAA7 --_005_234B758DE9A64449BEB6BB5D1345CA7A36158CB4mbx026e1nj2exch_ Content-Type: image/gif; name="image002.gif" Content-Description: image002.gif Content-Disposition: inline; filename="image002.gif"; size=857; creation-date="Fri, 21 Feb 2014 21:44:17 GMT"; modification-date="Fri, 21 Feb 2014 21:44:17 GMT" Content-ID: Content-Transfer-Encoding: base64 R0lGODdhCgANAPcAAAAAAIAAAACAAICAAAAAgIAAgACAgMDAwMDcwKbK8AAAAAAAKgAAVQAAfwAA qgAA1AAqAAAqKgAqVQAqfwAqqgAq1ABVAABVKgBVVQBVfwBVqgBV1AB/AAB/KgB/VQB/fwB/qgB/ 1ACqAACqKgCqVQCqfwCqqgCq1ADUAADUKgDUVQDUfwDUqgDU1CoAACoAKioAVSoAfyoAqioA1Coq ACoqKioqVSoqfyoqqioq1CpVACpVKipVVSpVfypVqipV1Cp/ACp/Kip/VSp/fyp/qip/1CqqACqq KiqqVSqqfyqqqiqq1CrUACrUKirUVSrUfyrUqirU1FUAAFUAKlUAVVUAf1UAqlUA1FUqAFUqKlUq VVUqf1UqqlUq1FVVAFVVKlVVVVVVf1VVqlVV1FV/AFV/KlV/VVV/f1V/qlV/1FWqAFWqKlWqVVWq f1WqqlWq1FXUAFXUKlXUVVXUf1XUqlXU1H8AAH8AKn8AVX8Af38Aqn8A1H8qAH8qKn8qVX8qf38q qn8q1H9VAH9VKn9VVX9Vf39Vqn9V1H9/AH9/Kn9/VX9/f39/qn9/1H+qAH+qKn+qVX+qf3+qqn+q 1H/UAH/UKn/UVX/Uf3/Uqn/U1KoAAKoAKqoAVaoAf6oAqqoA1KoqAKoqKqoqVaoqf6oqqqoq1KpV AKpVKqpVVapVf6pVqqpV1Kp/AKp/Kqp/Vap/f6p/qqp/1KqqAKqqKqqqVaqqf6qqqqqq1KrUAKrU KqrUVarUf6rUqqrU1NQAANQAKtQAVdQAf9QAqtQA1NQqANQqKtQqVdQqf9QqqtQq1NRVANRVKtRV VdRVf9RVqtRV1NR/ANR/KtR/VdR/f9R/qtR/1NSqANSqKtSqVdSqf9SqqtSq1NTUANTUKtTUVdTU f9TUqtTU1AAAAAwMDBkZGSYmJjMzMz8/P0xMTFlZWWZmZnJycn9/f4yMjJmZmaWlpbKysr+/v8zM zNjY2OXl5fLy8v/78KCgpICAgP8AAAD/AP//AAAA//8A/wD//////ywAAAAACgANAAAIPgDxCRw4 EAC+fwcQKjxgMCHDhAD+GUQYEcDDhhIzVjwIkSJDfA8zQjxYUWRDixVHmnSI0aHCiS5ZAphJs2ZA ADs= --_005_234B758DE9A64449BEB6BB5D1345CA7A36158CB4mbx026e1nj2exch_--