X-Virus-Scanned: clean according to Sophos on Logan.com From: "Les C" Received: from [40.92.3.24] (HELO NAM02-BL2-obe.outbound.protection.outlook.com) by logan.com (CommuniGate Pro SMTP 6.2c1) with ESMTPS id 9609148 for flyrotary@lancaironline.net; Sat, 25 Mar 2017 16:01:15 -0400 Received-SPF: pass receiver=logan.com; client-ip=40.92.3.24; envelope-from=lesphoto@hotmail.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=hotmail.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=jxq4GEmEMvcL2KfCv6gkh1Q+iNjXXy+o6a1jI29PEb4=; b=ZmCJPkfTy11tN+xdTUh+wtYQKS4XcfR/T0vQDv8AeE+DvGOkywh8IIW18l9kSwsNMrZmok3Y5cybnqZy5w8Q/r8EfSppM0t+1nm63NsMAIkw+nElCE++AxqYoMyJCsumesnOP2hE3NgqPwSGS+5lfqG29h9grOBlmvd911M6MbDyy4j76uU8tOWXghNFsH0oq3JCpQTgH/tVVnRld8595oMASGbPnILCuJ9VUxL85Fp+XfwrYS8ePIY75ITVmow+5fTmfKIMk9ASWryqMggQodowrVm5z5WZl6EiuSJ/tIEZ83h65g0ZgC6KqR5DDcuNrliAPsdO39Nq5BuPbnXWug== Received: from BL2NAM02FT037.eop-nam02.prod.protection.outlook.com (10.152.76.60) by BL2NAM02HT239.eop-nam02.prod.protection.outlook.com (10.152.76.136) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.977.7; Sat, 25 Mar 2017 20:00:56 +0000 Received: from BN6PR16MB1682.namprd16.prod.outlook.com (10.152.76.58) by BL2NAM02FT037.mail.protection.outlook.com (10.152.77.11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.977.7 via Frontend Transport; Sat, 25 Mar 2017 20:00:56 +0000 Received: from BN6PR16MB1682.namprd16.prod.outlook.com ([10.172.28.7]) by BN6PR16MB1682.namprd16.prod.outlook.com ([10.172.28.7]) with mapi id 15.01.0961.026; Sat, 25 Mar 2017 20:00:56 +0000 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Fuel Pump current and pressures Thread-Topic: [FlyRotary] Re: Fuel Pump current and pressures Thread-Index: AQHSpJ+J3feW90ArikyFNCxrD5jLnqGl+8Wy Date: Sat, 25 Mar 2017 20:00:55 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: lancaironline.net; dkim=none (message not signed) header.d=none;lancaironline.net; dmarc=none action=none header.from=hotmail.com; x-incomingtopheadermarker: OriginalChecksum:FE4668EBF75674F0E706A705258389706675D8D0E771D7CA1B753E1EFD2DE68D;UpperCasedChecksum:AC2C40B378AD51FF2F0ED6A65091092FB73E03A4C0A997F052B52E25C239A17C;SizeAsReceived:8007;Count:42 x-ms-exchange-messagesentrepresentingtype: 1 x-tmn: [ZuJevMhkPMEoxhGaWDVUc4MfMWL/tuzj] x-microsoft-exchange-diagnostics: 1;BL2NAM02HT239;5:ihzr78YUbtpZwaVqHxO53wy3Jxp+g7bPmabgVvvWybDXPhobN03bbKtUmB+8ZBfa7gj5ZRTaKrEuaMuE8R7K/yNxzKg3jSQV/3C1XqqMJbW/TC511vlek4/DvBHNyWhrGHo6ewWvO5LWfokX0GGseg==;24:SaP7YVWcQMAQz2j1RtMTRDEhpE8hRctUKVzRGxDXsq0qkyXr8YvsyAJhu+fT1xGa9yBmH6+Nf2nu20RRckIwVKpT0atj+cSyS70vYRZe/iU=;7:kDPe0bxQC3McB+hCL7K0tYqxmTXGSeFHHOg8m1xaR+o+Aasz4rwcbAE4pNsSTY3m8wa5dQ/67MyRIbhmeb3CMnwoxpFHhYN4B6d2TBWbDWjbxgkzClWMnULmGM0K9TxA6bsmcacTFTBBqFZitRKsqxah9VunWtM3NQcHxXzWbyMuPPQ0rrLStbVO53DYsAZ2A+34wVxuGkOIpeuvcMAcc792RWo3lf6WiJDf+5y1fdjOymUN6stRyOboocso0n9wv231sqUKjeQaHa28EdArWfijK45BXWi+BLAnkilzRny4fckvUjUYRrizfo1pGu0K x-incomingheadercount: 42 x-eopattributedmessage: 0 x-forefront-antispam-report: EFV:NLI;SFV:NSPM;SFS:(7070007)(98901004);DIR:OUT;SFP:1901;SCL:1;SRVR:BL2NAM02HT239;H:BN6PR16MB1682.namprd16.prod.outlook.com;FPR:;SPF:None;LANG:en; x-ms-office365-filtering-correlation-id: 6e59b0d8-a171-452c-63ae-08d473b9a62f x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(22001)(201702061074)(5061506573)(5061507331)(1603103135)(2017031320274)(2017031322274)(1603101448)(1601125374)(1701031045);SRVR:BL2NAM02HT239; x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(444000031);SRVR:BL2NAM02HT239;BCL:0;PCL:0;RULEID:;SRVR:BL2NAM02HT239; x-forefront-prvs: 025796F161 spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: multipart/alternative; boundary="_000_BN6PR16MB168208E0B1163B3CFA85F7A3D9310BN6PR16MB1682namp_" MIME-Version: 1.0 X-OriginatorOrg: hotmail.com X-MS-Exchange-CrossTenant-originalarrivaltime: 25 Mar 2017 20:00:55.6912 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Internet X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL2NAM02HT239 --_000_BN6PR16MB168208E0B1163B3CFA85F7A3D9310BN6PR16MB1682namp_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Unsubscribe Get Outlook for Android ________________________________ From: Rotary motors in aircraft on behalf of = Stephen Izett Sent: Friday, March 24, 2017 9:06:32 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Fuel Pump current and pressures Good idea Charlie. That would clear it up as far as the manifold flow characteristics. Just a pain in the but to get to. Thanks Steve On 24 Mar 2017, at 8:56 pm, Charlie England > wrote: Have you tried swapping the position of the pumps & making the same measure= ments? It's hard to imagine it making that much difference, but the bottom = pump does have a tight right turn and then a sharp edged 'T' turn to the le= ft. I couldn't guess how much, but that would account for at least some pre= ssure increase. Charlie On Fri, Mar 24, 2017 at 4:14 AM, steve Izett > wrote: Hi Guys Hi Peoples Here is a photo of our parallel pumps plumbed with 3/8 aluminium lines feed= from a 28 gallon header tank above to the right. Fuel then passes through the firewall and race filter before feeding the ra= il and returning via the pressure regulator (4cyl toyota reg) back through the firewall to the header tank, again in 3/8. I did further measurements today. 1. Bottom Pump only ~8A and 48psi - Turning both pumps on this pump draws 9= .9A and produces a rail pressure of 65psi 2. Bottom Pump only ~9.9A and 44psi - Turning both pumps on this pump draws= 14.8A and produces the same rail pressure of 65psi So bottom pump goes from 8.0 -> 9.9A (1.9A increase) under higher head pres= sure Top pump goes from 9.9A -> 14.8A (5.1A increase) under same head!! Clearly Pressure Reg bypass capacity is inadequate for both pumps, perhaps = with even one pump running. (I don=92t have data of fuel pressure under load to see if it drops as powe= r is applied) I think I modelled the pump layout/manifold after seeing someone else=92s a= nd not sure if it causes any problems? The pumps came from eBay stating that they were genuine Walbro and now I=92= m wondering. Cheers Steve Izett Glasair Super II RG Renesis 4 port RD1C EC3 EM3 --_000_BN6PR16MB168208E0B1163B3CFA85F7A3D9310BN6PR16MB1682namp_ Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable

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From: Rotary motors in airc= raft <flyrotary@lancaironline.net> on behalf of Stephen Izett <fly= rotary@lancaironline.net>
Sent: Friday, March 24, 2017 9:06:32 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Fuel Pump current and pressures
 
Good idea Charlie. 
That would clear it up as far as the manifold flow characte= ristics.
Just a pain in the but to get to.
Thanks
Steve



On 24 Mar 2017, at 8:56 pm, Charlie England <flyrotary@lancaironline.net<= /a>> wrote:

Have you tried swapping the position of the pum= ps & making the same measurements? It's hard to imagine it making that = much difference, but the bottom pump does have a tight right turn and then = a sharp edged 'T' turn to the left. I couldn't guess how much, but that would account for at least some pressure increase= . 

Charlie

On Fri, Mar 24, 2017 at 4:14 AM, steve Izett <flyrotary@lancaironline.net> wrote:
Hi Guys
Hi Peoples

Here is a photo of our parallel pumps plumbed with 3/8 alum= inium lines feed from a 28 gallon header tank above to the right.
Fuel then passes through the firewall and race filter befor= e feeding the rail and returning via the pressure regulator (4cyl toyota re= g) 
back through the firewall to the header tank, again in 3/8.=

I did further measurements today. 

1. Bottom Pump only ~8A and 48psi - Turning both pumps= on this pump draws 9.9A and produces a rail pressure of 65psi
2. Bottom Pump only ~9.9A and 44psi - Turning both pum= ps on this pump draws 14.8A and produces the same rail pressure of 65psi

So bottom pump goes from 8.0 -> 9.9A (1.9A increase) und= er higher head pressure
Top pump goes from 9.9A -> 14.8A (5.1A increase) under s= ame head!!

Clearly Pressure Reg bypass capacity is inadequate for both= pumps, perhaps with even one pump running. 
(I don=92t have data of fuel pressure under load to see if = it drops as power is applied)
I think I modelled the pump layout/manifold after seeing so= meone else=92s and not sure if it causes any problems?
The pumps came from eBay stating that they were genuine Wal= bro and now I=92m wondering.

Cheers

Steve Izett
Glasair Super II RG Renesis 4 port RD1C EC3 EM3 





<F= uel Pres Pumps.JPG>


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