X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from elasmtp-masked.atl.sa.earthlink.net ([209.86.89.68] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2184052 for flyrotary@lancaironline.net; Tue, 17 Jul 2007 22:49:57 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.68; envelope-from=CBarber@TexasAttorney.net Received: from [64.91.181.4] (helo=userte4ok6qti7) by elasmtp-masked.atl.sa.earthlink.net with asmtp (Exim 4.34) id 1IAzbM-0001lT-GS for flyrotary@lancaironline.net; Tue, 17 Jul 2007 22:49:20 -0400 Message-ID: <02e301c7c8e6$4c750840$0401a8c0@userte4ok6qti7> From: "Christopher Barber" To: "Rotary motors in aircraft" Subject: RPM's and intake leaks Date: Tue, 17 Jul 2007 21:49:42 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_02E0_01C7C8BC.623F9750" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1807 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1896 X-ELNK-Trace: 04a7e290e6af3b12d3631fa4f7b525ef239a348a220c2609b309e2d81a55388ceb45b4224354545b350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 64.91.181.4 This is a multi-part message in MIME format. ------=_NextPart_000_02E0_01C7C8BC.623F9750 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Went to the hangar early this afternoon (hey, it was my day off...I = lounged around a bit this am and watched Flyboys from PPV....mediocre, = but lots of plane stuff) and took off the revisited every orifice, = recapped and sealed every potential for leaks. I found two that were = probable the cuprits. I also ground down some old screw points on the = top of the engine to allow a much more natural lay for the Mistral = runners. Got in, and started the engine. It was a bit tough, but if finally = caught AND it was running COMPLETLY differently. I was able to have it = run all the way down to 400 RPM.....however it runs like.....uh, poorly = this low. The engine was surging and running very rough even when I = increased the throttle, then I remembered that I had started to tune it = with the higher RPM's. So, I reset the ECU, actually, I figured to do = this just after it started and it actually started after only a short = rest (as of now, it really has not liked to start for a while once it is = shut down). It was runny rough, but I got it into autotune mode and things started = to smooth out. I had it running about 15 minutes at lower RPM and began = to worry about temps since it has been an issue. I took it out of = autotune mode and the H2O temp was 158 and the oil was around = 173.....MUCH BETTER. As we mentioned, we have a leak in the PSRU, which seems to be getting = worse, so I didn't want to run it too much 'till we figure the leak out. = I wanted to start it for an EAA sister chapter (EAA 712) meeting at my = hangar tonight. So I cleaned the hangar a bit. When the EAA chapter = arrived and I had an audiance the thing would not start. Of course. The = injectors firing at 3000 in Mode Zero reared its head again and I am = guessing it flooded the engine. So, even though it would not start this evening I consider it a good day = as we seemed to get the rpms down. Now to investigate the PSRU issue as = well as get this thing running more smothly again. Just one more step. All the best, Chris Cross posted in Flyrotary ------=_NextPart_000_02E0_01C7C8BC.623F9750 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Went to the hangar early this afternoon (hey, it was my day off...I = lounged=20 around a bit this am and watched Flyboys from PPV....mediocre, but lots = of plane=20 stuff) and took off the revisited every orifice, recapped and sealed = every=20 potential for leaks. I found two that were probable the = cuprits. I=20 also ground down some old screw points on the top of the engine to allow = a much=20 more natural lay for the Mistral runners.

Got in, and started the engine. It was a bit tough, but if = finally=20 caught AND it was running COMPLETLY differently. I was able to = have it run=20 all the way down to 400 RPM.....however it runs like.....uh, poorly this = low. The engine was surging and running very rough even when I = increased=20 the throttle, then I remembered that I had started to tune it with the = higher=20 RPM's. So, I reset the ECU, actually, I figured to do this just = after it=20 started and it actually started after only a short rest (as of now, it = really=20 has not liked to start for a while once it is shut down).

It was runny rough, but I got it into autotune mode and things = started to=20 smooth out. I had it running about 15 minutes at lower RPM and = began to=20 worry about temps since it has been an issue. I took it out of = autotune=20 mode and the H2O temp was 158 and the oil was around 173.....MUCH = BETTER.

As we mentioned, we have a leak in the PSRU, which seems to be = getting worse,=20 so I didn't want to run it too much 'till we figure the leak out. = I wanted=20 to start it for an EAA sister chapter (EAA 712) meeting at my hangar = tonight. So=20 I cleaned the hangar a bit. When the EAA chapter arrived and I had = an=20 audiance the thing would not start. Of course. The injectors = firing=20 at 3000 in Mode Zero reared its head again and I am guessing it flooded = the=20 engine.

So, even though it would not start this evening I consider it a good = day as=20 we seemed to get the rpms down. Now to investigate the PSRU issue = as well=20 as get this thing running more smothly again. Just one more = step.

All the best,

Chris

Cross posted in Flyrotary

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