X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from access.aic-fl.com ([204.49.76.2] verified) by logan.com (CommuniGate Pro SMTP 4.3.2) with ESMTP id 961458 for flyrotary@lancaironline.net; Mon, 23 May 2005 22:52:21 -0400 Received-SPF: none receiver=logan.com; client-ip=204.49.76.2; envelope-from=unicorn@gdsys.net Received: from b9k4u9 (unverified [204.49.76.191]) by access.aic-fl.com (Rockliffe SMTPRA 4.5.6) with SMTP id for ; Mon, 23 May 2005 21:51:02 -0500 Message-ID: <001a01c5601c$ae7178b0$bf4c31cc@b9k4u9> From: "Richard Sohn" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Injector Valves (was Re: Technical Advisor) Date: Mon, 23 May 2005 21:54:29 -0700 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Ian, the OMP varies the amount of oil going into the valve. The valve is actually a mini intake manifold in parallel to the main intake manifold. When the rotor sucks the mixture in through the manifold, some of it is going through the little vacuum hose and the little hole in the rotor housing picking up what oil the OMP got into the valve. This oil is misted into the combustion chamber. If you have no valve, the droplets of oil will only produce an oil sweat at the exit in the rotor housing and not doing anything. Sorry! I hope I was able to clarify this. Richard Sohn N-2071U ----- Original Message ----- From: "Ian Dewhirst" To: "Rotary motors in aircraft" Sent: Monday, May 23, 2005 7:05 PM Subject: [FlyRotary] Injector Valves (was Re: Technical Advisor) > Hi Richard, > > Do the injector valves vary the amount of oil injected based on load? I > have dissassembled a pump from a 13BT and it looks to be a positive > displacement type with no apparent pressure relief function. I do not > have any "injector valves", just plain old banjo bolts that thread into > the housings, a jet sits in the bottom of the hole below the banjo bolt. > What am I missing? > > Thanks -- Ian > > ------------------------------------------------------ > > Georges, > > the 12A pump is way to small for the 13B. According to the spec. the 12A > pump is pumping 2.0 - 2.5 cc in 6 minutes on its two lines with the > engine running at 2000RPM. > The 13B NT does 4.5-5.5 cc on two lines in 5 minutes engine running at > 2000RPM. The Turbo setting does 5.2 - 6.6 under the same condition. > One more thing, if you use the OMP. You must retain the injector valves > sitting on the rotor housing and the intake manifold. Their vacuum line is > hooked up to the intake plenum. These valves do the oil injection, the OMP > only supplies the oil! > I hope this answers the question. > > Richard Sohn > N-2071U > > >>> Homepage: http://www.flyrotary.com/ >>> Archive: http://lancaironline.net/lists/flyrotary/List.html