Return-Path: Received: from smtp810.mail.sc5.yahoo.com ([66.163.170.80] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with SMTP id 3063282 for flyrotary@lancaironline.net; Thu, 04 Mar 2004 13:19:10 -0500 Received: from unknown (HELO Davidscmptr) (dcarter11@sbcglobal.net@64.219.115.116 with login) by smtp810.mail.sc5.yahoo.com with SMTP; 4 Mar 2004 18:19:09 -0000 Message-ID: <03d701c40215$2162ac20$6401a8c0@Davidscmptr> Reply-To: "David Carter" From: "David Carter" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Ideal Cooling System Plumbing -- PLUS 'bestcoolant leak indicator' Date: Thu, 4 Mar 2004 12:18:44 -0600 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 > David, the water pump in the car is not a positive displacement pump. The > moment the impeller is exposed to air it will stop sucking. You are assuming > that the pump will suck all the liquid gradually from the radiator until > dry. > This can happen if the radiator was on top of the engine, or the pump was > the self priming type, which is not the case. > Regards; > Bulent True. I personally am not concerned about when the pump stops pumping in a leak situation - I hope to have indication of leak and be on ground before that unhappy event ever happens! David