X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-02.southeast.rr.com ([24.25.9.101] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2184656 for flyrotary@lancaironline.net; Wed, 18 Jul 2007 06:51:05 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.101; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-103-061.carolina.res.rr.com [24.74.103.61]) by ms-smtp-02.southeast.rr.com (8.13.6/8.13.6) with SMTP id l6IAo5QJ012874 for ; Wed, 18 Jul 2007 06:50:05 -0400 (EDT) Message-ID: <000f01c7c929$be5d0dc0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] RPM's and intake leaks Date: Wed, 18 Jul 2007 06:52:32 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000C_01C7C908.37019380" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_000C_01C7C908.37019380 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Glad to hear you got the idle speed down, Chris. Air leaks are the most = common cause. You may be asking a bit much for the engine with the = light mass of the prop to idle nicely at 400 rpm. I would suggest that = 800 rpm is really excellent. My normal idle speed is 1600 rpm FWIW Ed ----- Original Message -----=20 From: Christopher Barber=20 To: Rotary motors in aircraft=20 Sent: Tuesday, July 17, 2007 10:49 PM Subject: [FlyRotary] RPM's and intake leaks 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_000C_01C7C908.37019380 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Glad to hear you got the idle speed down, = Chris.  Air=20 leaks are the most common cause.  You may be asking a bit much for = the=20 engine with the light mass of the prop to idle nicely at = 400 rpm.  I=20 would suggest that  800 rpm is really excellent.  My normal = idle speed=20 is 1600 rpm FWIW
 
Ed
----- Original Message -----
From:=20 Christopher Barber =
Sent: Tuesday, July 17, 2007 = 10:49=20 PM
Subject: [FlyRotary] RPM's and = intake=20 leaks

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=20 plane stuff) and took off the revisited every orifice, recapped and = sealed=20 every potential for leaks.  I found two that were probable the=20 cuprits.  I also ground down some old screw points on the top of = the=20 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=20 caught AND it was running COMPLETLY differently.  I was able to = have it=20 run all the way down to 400 RPM.....however it runs like.....uh, = poorly this=20 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=20 worse, so I didn't want to run it too much 'till we figure the leak = out. =20 I wanted to start it for an EAA sister chapter (EAA 712) meeting at my = hangar=20 tonight. So I cleaned the hangar a bit.  When the EAA chapter = arrived and=20 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=20 it flooded the 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=20 well as get this thing running more smothly again.  Just one more = step.

 

All the best,

 

Chris

 

Cross posted in Flyrotary

 

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