Return-Path: Received: from [216.52.245.18] (HELO ispwestemail2.mdeinc.com) by logan.com (CommuniGate Pro SMTP 4.2.4) with ESMTP id 453168 for flyrotary@lancaironline.net; Tue, 05 Oct 2004 07:32:03 -0400 Received-SPF: none receiver=logan.com; client-ip=216.52.245.18; envelope-from=wschertz@ispwest.com Received: from 7n7z201 (unverified [67.136.145.198]) by ispwestemail2.mdeinc.com (Vircom SMTPRS 3.2.315.0) with SMTP id for ; Tue, 5 Oct 2004 04:31:28 -0700 Message-ID: <000401c4aace$dbc82b50$c6918843@7n7z201> From: "William" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Low power 20B operation Date: Tue, 5 Oct 2004 06:20:14 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0230_01C4AAA3.606DDB60" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1437 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1441 This is a multi-part message in MIME format. ------=_NextPart_000_0230_01C4AAA3.606DDB60 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageJohn, Have you checked you fuel filter(s)? Composite planes often begin to = plug them after some run time with small debris that remained after you = thought the tanks were clean. Happened to a E-racer near me -- had flown = a number of times, then engine started not generating full power -- = checked the filters and they were almost plugged. Bill Schertz KIS Cruiser # 4045 ----- Original Message -----=20 From: Ed Anderson=20 To: Rotary motors in aircraft=20 Sent: Sunday, October 03, 2004 9:04 PM Subject: [FlyRotary] Re: Low power 20B operation I could be wrong, but I sort of doubt its an apex seal, John. The reason is a bad apex seal will generally make starting very = difficult (two chambers down on compression), but once started an engine = with a bad apex seal will generally produce power (just not as much as = with good seals) enough to get you up into the 4000-5000 rpm. Generally = just a normal compression gauge will tell you whether you have a bad = apex seal as you will get one face with good compression and two with = low compression. But, of course, a professional Mazda compression test = is the ultimate. You generally will also find a bit of vibration when an apex seal = goes as the power pulses are no longer in balance. It sounds to me like your are not getting enough fuel if you can not = make enough power to get beyond 2300 rpm. Even if you were not staging = and getting all four injectors, two should easily get you up into the = 4000-5000 rpm range. I presume the throttle body is opened fully when = you are at 2300 rpm - no slipping throttle cables? No pinched fuel = hoses? No collapsed air filters/hoses? Ed Anderson ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Monday, October 04, 2004 8:45 PM Subject: [FlyRotary] Re: Low power 20B operation After fixing the injector switches, EC2, PCM and triple checking all = the ignition and injector circuits I STILL have an engine that runs like = sh.t. 2300 rpm full throttle. I'm beginning to suspect an internal = problem like an apex seal or O rings. Tomorrow I'm having a professional = mazda compression test done. =20 Is it running incredibly rough? It's semi-likely that you could = have a stuck apex seal as long as the engine has sat around. I think Ed = is our resident expert on trying to free those. Even an unprofessional = compression test would tell the tale. =20 John (Please tell me it's not a blown engine)=20 Your neighbors must get tired of that black cloud over your house = all the time. I'm starting to think you and Al need to take a trip to = New Orleans and have a consult with one of the voodoo folks :-) Seriously, I'm sorry to hear of your continued problems. I can only = imagine how frustrating it must be. Hang in there. Rusty (feeling better about my engine with every message I read)=20 ------=_NextPart_000_0230_01C4AAA3.606DDB60 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
John,
Have you checked you fuel filter(s)? = Composite=20 planes often begin to plug them after some run time with small debris = that=20 remained after you thought the tanks were clean. Happened to a E-racer = near me=20 -- had flown a number of times, then engine started not generating full = power --=20 checked the filters and they were almost plugged.
 
Bill Schertz
KIS Cruiser # 4045
----- Original Message -----
From:=20 Ed=20 Anderson
Sent: Sunday, October 03, 2004 = 9:04=20 PM
Subject: [FlyRotary] Re: Low = power 20B=20 operation

I could be wrong, but I sort of doubt = its an apex=20 seal, John.
 
The reason is a bad apex = seal will=20  generally make starting very difficult (two chambers down on=20 compression), but once started an engine with a bad apex seal will = generally=20 produce power (just not as much as with good seals) enough to get you = up into=20 the 4000-5000 rpm.  Generally just a normal compression gauge = will tell=20 you whether you have a bad apex seal as you will get one face with = good=20 compression and two with low compression.  But, of course, a = professional=20 Mazda compression test is the ultimate.
 
You generally will also find a bit of = vibration  when an apex seal goes as the power pulses are no = longer in=20 balance.
 
It sounds to me like your are not = getting enough=20 fuel if you can not make enough power to get beyond 2300 = rpm. Even if you=20 were not staging and getting all four injectors, two should easily get = you up=20 into the 4000-5000 rpm range.  I presume the throttle body is = opened=20 fully when you are at 2300 rpm - no slipping throttle cables?  No = pinched=20 fuel hoses?  No collapsed air filters/hoses?
 
Ed Anderson
 
 
 
 
 
----- Original Message -----
From:=20 Russell=20 Duffy
To: Rotary motors in = aircraft=20
Sent: Monday, October 04, = 2004 8:45=20 PM
Subject: [FlyRotary] Re: Low = power 20B=20 operation

After fixing the injector switches, EC2, = PCM and=20 triple checking all the ignition and injector circuits I STILL have = an=20 engine that runs like sh.t. 2300 rpm full throttle. I'm beginning to = suspect=20 an internal problem like an apex seal or O rings. Tomorrow I'm = having a=20 professional mazda compression test done.  
 
Is it running incredibly rough?  It's = semi-likely=20 that you could have a stuck apex seal as long as the engine has sat=20 around.  I think Ed is our resident expert on trying to free=20 those.  Even an unprofessional compression test would tell = the=20 tale.   
 
John (Please tell me it's not a blown = engine) 
 
Your neighbors must get tired of that black = cloud over=20 your house all the time.  I'm starting to think you and Al need = to take a trip to New Orleans and have a consult with one = of the=20 voodoo folks :-)
 
Seriously, I'm sorry to hear of your = continued=20 problems.  I can only imagine how frustrating it must = be.  Hang in there.
 
Rusty (feeling better about my engine with = every=20 message I read) 
 
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