X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 15 Dec 2005 00:57:53 -0500 Message-ID: X-Original-Return-Path: Received: from imo-m18.mx.aol.com ([64.12.138.208] verified) by logan.com (CommuniGate Pro SMTP 5.0.4) with ESMTP id 882571 for lml@lancaironline.net; Wed, 14 Dec 2005 18:43:11 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.138.208; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m18.mx.aol.com (mail_out_v38_r6.3.) id q.25c.3987a57 (4410) for ; Wed, 14 Dec 2005 18:42:21 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: <25c.3987a57.30d207dd@aol.com> X-Original-Date: Wed, 14 Dec 2005 18:42:21 EST Subject: Re: [LML] Re: Air filters X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1134603741" X-Mailer: 9.0 Security Edition for Windows sub 5300 X-Spam-Flag: NO -------------------------------1134603741 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 12/14/2005 11:39:07 A.M. Central Standard Time, REHBINC@aol.com writes: Try this, Your engine is an air pump. For a 4 cylinder aircraft engine each revolution has 1 cylinder drawing in air, 1 compressing air, 1 firing and 1 exhausting combustion products. Thus, 1 revolution consumes 1/4 x 360 cubic inches or 90 ci or .625 cubic feet. At 2700 rpm and WOT, that's 2700 x .675 cf or 1688 cfm. Lbs/Hr depends on air density. Scott, Further to my last post and in answer to my own question, you appear to have divided cubic inches by 144 to get cubic feet. Should have divided by 12 cubed or 1728. I did the same thing, which results in 12 times too much carburator. I think we've been out of school too long. Rob, Hmmmm..... cube means 3 dimensional......... Oh well, that's why you guys are out there..... What a way to end the year. On 1/1/06, at 12:02 am I will have made no mistakes in the new year (Unless ???????) You are right. 90 ci / 1728 = .0521 cubic feet. 2700 x .0521 = 141 cfm. But, you missed an additional error in that .625 somehow became transmogrified to .675 later in the miscalculation. I am going to face the corner now. Maybe I need more meds. Scott -------------------------------1134603741 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 12/14/2005 11:39:07 A.M. Central Standard Time,=20 REHBINC@aol.com writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>

Try this,

Your engine is an air pump. For a= 4=20 cylinder aircraft engine each revolution has 1 cylinder drawing in air,=20= 1=20 compressing air, 1 firing and 1 exhausting combustion products.&nbs= p;=20 Thus, 1 revolution consumes 1/4 x 360 cubic inches or 90 ci or .625 cubi= c=20 feet. At 2700 rpm and WOT, that's 2700 x .675 cf or 1688 cfm. Lbs/= Hr=20 depends on air density.

Scott,

Further to my last post and in answer to my own question, you appear=20= to=20 have divided cubic inches by 144 to get cubic feet. Should have divided by= 12=20 cubed or 1728. I did the same thing, which results in 12 times too much=20 carburator.

I think we've been out of school too long.

<= /DIV>

Rob,

Hmmmm..... cube means 3 dimensional......... Oh well, that's why=20= you=20 guys are out there..... What a way to end the year. On 1/1/06, at 12:0= 2=20 am I will have made no mistakes in the new year (Unless ???????)

You are right. 90 ci / 1728 =3D .0521 cubic feet. 2700 x .0= 521 =3D=20 141 cfm.

But, you missed an additional error in that .625 somehow became=20 transmogrified to .675 later in the miscalculation.

I am going to face the corner now. Maybe I need more meds.

Scott

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