Return-Path: Received: from fed1mtao03.cox.net ([68.6.19.242] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 3119272 for flyrotary@lancaironline.net; Wed, 24 Mar 2004 20:07:56 -0500 Received: from smtp.west.cox.net ([172.18.180.52]) by fed1mtao03.cox.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with SMTP id <20040325010755.OWAG2428.fed1mtao03.cox.net@smtp.west.cox.net> for ; Wed, 24 Mar 2004 20:07:55 -0500 From: To: "Rotary motors in aircraft" Subject: Re: NA questions Date: Wed, 24 Mar 2004 20:07:57 -0500 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----=____1080176877917_U6e7Tz,Cmp" Message-Id: <20040325010755.OWAG2428.fed1mtao03.cox.net@smtp.west.cox.net> This is a multi-part message in MIME format. ------=____1080176877917_U6e7Tz,Cmp Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Greg, I thing you are a little confused about the meaning of the term NA. It means normally aspirated, as opposed to turbocharged (or supercharged, or "blown"). Most flying rotarys are using fuel injection (as opposed to carburation). Why one instead of the other? Lets put it this way - almost every car made in the world today uses fuel injection. Most (designed in the 1940's) aircraft use carburators. Carburators are more simple and can be easier to install. That is about the only reason to use them anymore, now that we have good computer systems for use in aircraft. Keep following the list, all these Q's will be answer ed over time. JMHO Dave Leonard > > Th anks Tommy, > > Those sound like great numbers. Could you tell m e what the PSRU ratio is? > Also, what your air/fuel ratio was? E d's spre adsheet indic ates that at > 5,500' at 5,000 rpm, a NA 13B fuel burn would be about 10.8 gph. Is your > power plant a NA 13B or is it fuel injected? > > Along these l ines, is an yone using fuel injection on their rotary? If so > why, if not wh y not? Simila r question for electronic ignition. These seem > like no brainer typ e installatio ns, but I notice that there are significant > numbers of NA 13B's f lying, so obvious ly I am missing something. > > Appreciate the report and look forw ard to more information . > > Warm Regards , > > Gre g > ------=____1080176877917_U6e7Tz,Cmp Content-Type: text/html; name="reply" Content-Disposition: inline; filename="reply"

Hi Guys,

Today, While cruising at 5500' and 5000rpm, the EGT was reading around 1675. Then about two hours into the flight, there was a slight loss of power to around 4800rpm, but the EGT shot up to 1800 where I have the limit light set. I had the mixture set with 0-1 bar showing in the mixture meter. To lower the EGT, I made the mixture richer to 5-6 bars. and the temp came down but stayed around 1750 for the rest of the day. Any guesses?

Thanks in advance!

Tommy James<><

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