X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from QMTA02.emeryville.ca.mail.comcast.net ([76.96.30.24] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3848427 for flyrotary@lancaironline.net; Sun, 13 Sep 2009 00:09:07 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.30.24; envelope-from=hoursaway1@comcast.net Received: from OMTA21.emeryville.ca.mail.comcast.net ([76.96.30.88]) by QMTA02.emeryville.ca.mail.comcast.net with comcast id g47R1c0041u4NiLA248Zbb; Sun, 13 Sep 2009 04:08:33 +0000 Received: from sz0081.ev.mail.comcast.net ([76.96.26.137]) by OMTA21.emeryville.ca.mail.comcast.net with comcast id g48Z1c00C2xV6SL8h48Zzt; Sun, 13 Sep 2009 04:08:33 +0000 Date: Sun, 13 Sep 2009 04:08:33 +0000 (UTC) From: hoursaway1@comcast.net To: Rotary motors in aircraft Message-ID: <801032284.571521252814913445.JavaMail.root@sz0081a.emeryville.ca.mail.comcast.net> In-Reply-To: <421441775.569911252814138396.JavaMail.root@sz0081a.emeryville.ca.mail.comcast.net> Subject: Re: [FlyRotary] Re: cooling plumbing design [ right?, right? :-) ] MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_28973_556883130.1252814913444" X-Originating-IP: [76.20.141.85] X-Mailer: Zimbra 5.0.16_GA_2927.RHEL5_64 (ZimbraWebClient - IE6 (Win)/5.0.16_GA_2927.RHEL5_64) ------=_Part_28973_556883130.1252814913444 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable You need some kind of header/ expansion tank in sys . with aprox =C2=A04 to= =C2=A08 square inches of air, allows sys . to pressurise more easily & main= tains a steady pressure .=C2=A0=C2=A0 David Cook=C2=A0 RV6A=C2=A0 Rotary.= =20 ----- Original Message -----=20 From: SHIPCHIEF @ aol .com=20 To: "Rotary motors in aircraft" < flyrotary @ lancaironline .net>=20 Sent: Saturday, September 12, 2009 12:42:10 PM GMT -05:00 US/Canada Eastern= =20 Subject: [ FlyRotary ] Re: cooling plumbing design [ right?, right? :-) ]= =20 I guess that answered my question;=20 I have the 'water flowing thru the tank with radiator cap on the tank' .=20 I did it to make sure all air is continuously removed from the system. Any = bubbles would go to the top of the thermostat housing and flow to the top o= f the tank. The line from the bottom of the tank goes to the water pump suc= tion to assure that the engine stays full.=20 When filling the system for the first time, the water enters the tank thru = the cap, and flows out into the engine thru the bottom 5/16ths hose, air de= parts thru the upper hose until the system is full.=20 When the engine is started, any trapped air in the forward part of the engi= ne gets pushed thru the turbo bearing housing cooling line back to the wate= r pump suction, where it rises thru the vent hole in the pump housing to th= e top, then is pushed to the head tank. Effective, heavy.=20 I see now that I can put the fill cap on the thermostat housing, and run a = hose to the burp tank bottom. Skip the header tank and remove a few pounds = from the fire wall.=20 Put a tee in the fwd 'vent' that sends cooling water thru the turbo, and op= en it when filling the system to purge air. Connect the cooling water press= ure sensor here.=20 Small remaining bubbles would acumulate in the thermostat housing/filler ne= ck where they would stay until enough system expansion pushed them out the = cap to the burp can. Upon cooling, system vacuum pulls water from the botto= m of the burp can, until no air remains in the engine...like the car.=20 DOH ! And I spent so much time and effort on the old system. ------=_Part_28973_556883130.1252814913444 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <= div style=3D'font-family: Arial; font-size: 12pt; color: #000000'>You need = some kind of header/expansion tank in sys. with aprox 4 to 8 squa= re inches of air, allows sys. to pressurise more easily & maintains a s= teady pressure. David Cook RV6A Rotary.
----- Or= iginal Message -----
From: SHIPCHIEF@aol.com
To: "Rotary motors in ai= rcraft" <flyrotary@lancaironline.net>
Sent: Saturday, September 12= , 2009 12:42:10 PM GMT -05:00 US/Canada Eastern
Subject: [FlyRotary] Re:= cooling plumbing design [ right?, right? :-) ]

I guess that answered my ques= tion;
I have the 'water flowing thru the tank with radiator cap on the t= ank'.
I did it to make sure all air is continuously removed from the sys= tem. Any bubbles would go to the top of the thermostat housing and flow to = the top of the tank. The line from the bottom of the tank goes to the water= pump suction to assure that the engine stays full.
When filling the sy= stem for the first time, the water enters the tank thru the cap, and flows = out into the engine thru the bottom 5/16ths hose, air departs thru the uppe= r hose until the system is full.
When the engine is started, any trapped= air in the forward part of the engine gets pushed thru the turbo bearing h= ousing cooling line back to the water pump suction, where it rises thru the= vent hole in the pump housing to the top, then is pushed to the head tank.= Effective, heavy.
I see now that I can put the fill cap on the thermost= at housing, and run a hose to the burp tank bottom. Skip the header tank an= d remove a few pounds from the fire wall.
Put a tee in the fwd 'vent' t= hat sends cooling water thru the turbo, and open it when filling the system= to purge air. Connect the cooling water pressure sensor here.
Small re= maining bubbles would acumulate in the thermostat housing/filler neck where= they would stay until enough system expansion pushed them out the cap to t= he burp can. Upon cooling, system vacuum pulls water from the bottom of the= burp can, until no air remains in the engine...like the car.
DOH! And I= spent so much time and effort on the old system. ------=_Part_28973_556883130.1252814913444--