X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [66.219.56.245] (HELO mail.qnsi.net) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3871622 for flyrotary@lancaironline.net; Thu, 01 Oct 2009 17:40:50 -0400 Received-SPF: none receiver=logan.com; client-ip=66.219.56.245; envelope-from=bhughes@qnsi.net Return-Receipt-To: "Bobby J. Hughes" MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01CA42E8.9ED7FC22" Subject: RE: [FlyRotary] Re: Activity Disposition-Notification-To: "Bobby J. Hughes" Content-class: urn:content-classes:message Date: Thu, 1 Oct 2009 16:43:38 -0600 X-MimeOLE: Produced By Microsoft Exchange V6.5 Message-ID: <74120FDE88CAFE4DBDA8814BCE20A3F315EC5D@qnsi-mail.qnsi.net> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Re: Activity Thread-Index: AcpC4hKOKo9U5+TgRu6VGL2mtLnLkwAAEUEg References: From: "Bobby J. Hughes" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01CA42E8.9ED7FC22 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable George, =20 Have not changed the heat exchangers. Just the plumbing and shortened the hose loop by about 18 inches. The increase from 21 to 26% is the opening size to core face ratio. I have about 272 sq in of core face and the opens are now 72 sq in. If this test doesn't work I will be adding a small oil to air exchanger in parallel with the oil \ water exchanger with dedicated inlet and reducing my Rad inlets back to 21% / 58 sq in. Actual core size is about 775 not 800 cu in as I stated earlier. =20 Glad I have the molds for all this stuff. =20 =20 Bobby (still wondering about Tracy's cooling solution) =20 ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of George Lendich Sent: Thursday, October 01, 2009 2:53 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Activity Bobby, I've seen between 3 to 3.5 cu" per HP, I guess that depends of how well the cooling is set-up, 800 cu" of Radiator should do fine for 250hp. If your previous exchanger was 650 cu" for 250 hp it was undersized. I guessdamated that size form the info you previously provided. =20 George (down under) George, =20 I have 800 cu in of water to air exchangers. No oil to air exchanger. At 6800 rpm \ 38" MP I'm producing close to 250 hp. But 15 hp is used to drive the SC. So about 3.2 cu in per HP. The new openings are about 72 sq in. The goal is to lower the water temps from 200F to 185F with an OAT of 100F. Oil is running 20F hotter than water. With the 21% ratio I was only able to maintain 185 HP and keep the oil temps below 220F \ OAT 95F. It all an experiment.=20 =20 Bobby ________________________________ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of George Lendich Sent: Wednesday, September 30, 2009 7:31 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Activity =09 =09 Bobby, What is your expected HP. How does 26% of core face equate to 3 cu" for every HP i.e. 200 hp =3D 600 cu" George (down under) With any luck I will be back in the air this weekend. I made several changes including opening my inlets from 21% to 26% of my core face. Of course it's no longer 105F so will have to extrapolate the data. Other changes include relocating the battery back to the stock location, removing 13lbs of tail ballets, new exhaust manifold and belly mount muffler, CO Detector, exhaust heat for cabin, O2 system, autopilot, 230 psi water spray for radiator and manifold injection (yet to be tested), re-plumb the oil to water exchanger and a fresh pilot bi-annual today.=20 =20 Bobby ________________________________ Anyone out there ??.....................<:) =20 ------_=_NextPart_001_01CA42E8.9ED7FC22 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable
George,
 
Have not changed the heat exchangers. Just the = plumbing and=20 shortened the hose loop by about 18 inches. The increase from 21 to = 26% is=20 the opening size to core face ratio. I have about 272 sq in of core = face=20 and the opens are now 72 sq in. If this test doesn't work I will be = adding a=20 small oil to air exchanger in parallel with the oil \ water exchanger = with=20 dedicated inlet and reducing my Rad inlets back to 21% / 58 sq=20 in.  Actual core size is about 775 not 800 cu in as I stated=20 earlier.
 
Glad I have the molds for all this stuff. =20
 
Bobby
(still wondering about = Tracy's=20 cooling solution) 
From: Rotary motors in aircraft=20 [mailto:flyrotary@lancaironline.net] On Behalf Of George=20 Lendich
Sent: Thursday, October 01, 2009 2:53 PM
To: = Rotary=20 motors in aircraft
Subject: [FlyRotary] Re: = Activity

 Bobby,
I've seen between 3 to 3.5 cu" per = HP, I guess=20 that depends of how well the cooling is set-up, 800 cu" of Radiator = should do=20 fine for 250hp.
If your previous exchanger was 650 cu" = for 250 hp=20 it was undersized. I guessdamated that size form the info you previously = provided.
 
George (down under)
George,
 
I have 800 cu in of water to air exchangers. No = oil to air=20 exchanger. At 6800 rpm \ 38" MP I'm producing close to 250 hp. But 15 = hp is=20 used to drive the SC. So about 3.2 cu in per HP. The new openings are = about 72=20 sq in. The goal is to lower the water temps from 200F to 185F with an = OAT of=20 100F. Oil is running 20F hotter than water. With the 21% ratio I was = only able=20 to maintain 185 HP and keep the oil temps below 220F \ OAT 95F. It all = an=20 experiment.
 
Bobby

From: Rotary motors in aircraft=20 [mailto:flyrotary@lancaironline.net] On Behalf Of George=20 Lendich
Sent: Wednesday, September 30, 2009 7:31 = PM
To:=20 Rotary motors in aircraft
Subject: [FlyRotary] Re:=20 Activity

 Bobby,
What is your expected = HP.
How does 26% of core face equate to 3 = cu" for=20 every HP
 i.e. 200 hp =3D 600 = cu"
George (down under)
With any luck I will be back in the air this = weekend. I=20 made several changes including opening my inlets from 21% to 26% of = my core=20 face. Of course it's no longer 105F so will have to extrapolate the = data.=20 Other changes include relocating the battery back to the stock = location,=20 removing 13lbs of tail ballets, new exhaust manifold and belly mount = muffler, CO Detector, exhaust heat for cabin, O2 system, autopilot, = 230 psi=20 water spray for radiator and manifold injection (yet to be tested), = re-plumb=20 the oil to water exchanger and a fresh pilot bi-annual=20 today. 
 
Bobby


Anyone out there ??.....................<:)
 
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