X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-qy0-f183.google.com ([209.85.221.183] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3844335 for flyrotary@lancaironline.net; Thu, 10 Sep 2009 09:32:36 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.221.183; envelope-from=rwstracy@gmail.com Received: by qyk13 with SMTP id 13so82978qyk.3 for ; Thu, 10 Sep 2009 06:32:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:received:in-reply-to :references:date:x-google-sender-auth:message-id:subject:from:to :content-type; bh=5468cDtiW3ux4gcv5ynOVGwMcrC2DJznPxJxR7+3e1M=; b=bv+7HqSAC9Iyvm9XtaDjV5vNSBohvKVeIp2rwVfjC4KQN5DXW/mz0BGqXvBKIEN94f mOdHfHdy2xT/RAIyP9yoo+VJ3en8DVg1PEvU0Dj58qlUhI/wTh9jTK14iD1N1jR8c0A7 PeNlUdUYrmPXgbrB96dHIeB6prpe+epB2UruU= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; b=lKYhSz/cMxsPSvjwVA2+BUZsxXfogR8yM1AGDs+tOcsa/MzpIo6sdJp2w07c0ckih+ h5V65feCZNkaxmVKoSh7FW/6a3G/ZjvgMWTr55lkVCn07qDo9DQXyVpvdulQJZOc77RS 16/XzpFCIUAkXNgNzke41DGDiP+3p8tA/iZjM= MIME-Version: 1.0 Sender: rwstracy@gmail.com Received: by 10.224.117.8 with SMTP id o8mr1302583qaq.227.1252589517286; Thu, 10 Sep 2009 06:31:57 -0700 (PDT) In-Reply-To: References: Date: Thu, 10 Sep 2009 09:31:57 -0400 X-Google-Sender-Auth: 94685d3783c5f213 Message-ID: <1b4b137c0909100631p40c49a8ife378cb7628b2431@mail.gmail.com> Subject: Re: [FlyRotary] cooling plumbing design [right?, right?, right? :-) ] From: Tracy Crook To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=000feaeec6533ac0a704733939d1 --000feaeec6533ac0a704733939d1 Content-Type: text/plain; charset=ISO-8859-1 As Ayn Rand said, "There are no contradictions. If you see one, examine your premise." Why would you want a large flow through the expansion tank? Tracy On Thu, Sep 10, 2009 at 2:02 AM, kevin lane wrote: > I was embarrassed to ask about this originally, but it seems I am not > alone with questions. having viewed several flying cooling system flow > designs at the rotary round-up, perhaps it isn't that critical. > one aspect I trying to understand is the expansion tank. there shouldn't > a big flow thru there, right? if the pressure is greatest at this far rotor > housing top port, then it must be lower in the expansion tank, and a slow > flow will take place towards the expansion tank, right? the small diameter > line will tend to push bubbles thru and they will separate in the expansion > tank. so, if they enter the tank above water level, this line will suck air > from the expansion tank as the cooling fluid cools and has a lesser volume, > right? not good. if the expansion tank feeds the cooling circulation > system by T'ing into the water pump output, then it is all on the higher > pressure side of the system, and the air in the expansion tank won't have a > tendency to be sucked into the circulation? is the design intention to keep > the expansion tank under pressure, rather than have it part of the flow > [circulation]? if the expansion tank was plumbed into the water pump > inlet port, then a second circulation route is created, which doesn't > involved the radiator [rear rotor port to tank to water pump, thru engine > block to rear port....], right? > as far as the bubble line for the radiator it seems that it would work by > allowing trapped bubbles in the higher end of the radiator to travel uphill > to the expansion tank. is the pressure at the radiator also higher, as with > the rear port? > enough questions. clear as mud, right? kevin > --000feaeec6533ac0a704733939d1 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable As Ayn Rand said, =A0 "There are no contradictions.=A0 If you see one,= examine your premise."

Why would you want a large flow through= the expansion tank?

Tracy

On Thu= , Sep 10, 2009 at 2:02 AM, kevin lane <n3773@comcast.net> wrote:
I was embarrassed to ask about this origi= nally,=20 but it seems I am not alone with questions.=A0 having viewed several flying= =20 cooling system flow designs at the rotary round-up, perhaps it isn't th= at=20 critical.
=A0 one aspect I trying to understand is = the=20 expansion tank.=A0 there shouldn't a big flow thru there, right?=A0 if = the=20 pressure is greatest at this far rotor housing top port, then it must be lo= wer=20 in the expansion tank, and a slow flow will take place towards the expansio= n=20 tank,=A0right?=A0 the small diameter line will tend to push bubbles thru=20 and they will separate in the expansion tank.=A0so, if they enter the tank= =20 above water level, this line will suck=A0air from the expansion tank as the= =20 cooling fluid cools and has a lesser volume, right?=A0not good. =A0 if the= =20 expansion tank feeds the cooling circulation system by T'ing into the w= ater pump=20 output, then it is all on the higher pressure side of the system, and the a= ir in=20 the expansion tank won't have a tendency to be sucked into the=20 circulation?=A0 is the design intention to keep the expansion tank under=20 pressure, rather than have it part of the flow [circulation]?=A0=A0=A0=20 if the expansion tank was plumbed into the water pump inlet port, then a se= cond=20 circulation route is created, which doesn't involved the radiator [rear= rotor=20 port to tank to water pump, thru engine block to rear port....],=20 right?
as far as the bubble line for the radiato= r it=20 seems that it would work by allowing trapped bubbles in the higher end of t= he=20 radiator to travel uphill to the expansion tank.=A0 is the pressure at the= =20 radiator also higher, as with the rear port?
enough questions.=A0 clear as mud,=20 right?=A0=A0 kevin

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