X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.121] verified) by logan.com (CommuniGate Pro SMTP 5.2.8) with ESMTP id 3184986 for flyrotary@lancaironline.net; Wed, 24 Sep 2008 09:11:13 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.121; envelope-from=eanderson@carolina.rr.com Received: from computername ([75.191.186.236]) by cdptpa-omta05.mail.rr.com with ESMTP id <20080924131037.ZSRG979.cdptpa-omta05.mail.rr.com@computername> for ; Wed, 24 Sep 2008 13:10:37 +0000 From: "Ed Anderson" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Vacuum Pulses Date: Wed, 24 Sep 2008 09:10:36 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0015_01C91E25.688946A0" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 Thread-Index: Ackd6FfVunSSLdEzQ3id6TrZjM0SqgAXR1tw In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Message-Id: <20080924131037.ZSRG979.cdptpa-omta05.mail.rr.com@computername> This is a multi-part message in MIME format. ------=_NextPart_000_0015_01C91E25.688946A0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Congratulations, Bill. Looks like your manifold reference fuel pressure regulator is working properly. Getting 5900 rpm on a 76x76 prop is doing very good indeed! I get 6000-6200 with a 74x88 prop which I had cut back from a 76" dia prop. With it a 76" I would normally get around 5900 rpm. So your engine is producing good power - particularly for a first start up. Tracy Crook and I both found that (at least the older 13Bs) that they continued to improve with run time - up to around 200-250 hours. I know it would seem that is a long break-in period, but we both found the same thing - slow increase in engine power. Not huge, but noticeable, compression seemed to be the reason, it appear to slowly get better. I did notice that there did not seem to be much difference in engine coolant temp going into and out of the engine, but then not knowing the engine run rpm for that graph its hard to say - looked like about a 5F increase. Are you using a stock water pump/pulley or something different? Looks very promising!!!!! Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.dmack.net/mazda/index.html _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Bill Schertz Sent: Tuesday, September 23, 2008 9:52 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Vacuum Pulses I am new at this engine running thing, having just done the third start/run . I have some instrumentation, and am enclosing a plot of Manifold pressure and Fuel pressure vs. time for the latest run. After letting it warm up at ~14 in MP , I started increasing the power, and you can see that the fuel pressure increases with the MP. Made one brief excursion to ~5900 rpm, swinging a 76x76 prop. All tests so far are with the cowl off, but the ducts are in place. More tests tomorrow. Longer run, move to higher rpm, test cooling system more Bill Schertz KIS Cruiser #4045 N343BS ----- Original Message ----- From: Al Gietzen To: Rotary motors in aircraft Sent: Tuesday, September 23, 2008 8:51 PM Subject: [FlyRotary] Re: Vacuum Pulses Al, after giving some thought about the directions that came with the Mallory pressure regulator, it states that if you are not using a turbo or some other boost device, to just leave the vacuum port open on the regulator, which may be my best option, as don't think I have any need to leave it hooked up. No sudden acceleration of engine anticipated. I plan on doing the orifices for the EC2 though. JohnD Yes, I agree. I started out with a unit that was not pressure referenced; for the same reason - NA. But it turned out that Tracy's EC2 was setup with the assumption of MAP referenced pressure, and I had trouble getting it tuned. So I replaced the regulator. This was in the early days of the EC2; maybe that more recent versions will tune fine without MAP reference. Al __________ Information from ESET NOD32 Antivirus, version of virus signature database 3267 (20080714) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ------=_NextPart_000_0015_01C91E25.688946A0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Congratulations, Bill.  Looks = like your manifold reference fuel pressure regulator is working = properly.

 

Getting 5900 rpm on a 76x76 prop is = doing very good indeed!   I get 6000-6200 with a 74x88 prop which I = had cut back from a 76” dia prop.  With it a 76” I would = normally get around 5900 rpm.  So your engine is producing good power - = particularly for a first start up.

 

Tracy Crook and I both found that = (at least the older 13Bs) that they continued to improve with run time - up = to around 200-250 hours.  I know it would seem that is a long break-in period, but we both found the same thing – slow increase in engine power.  Not huge, but noticeable, compression seemed to be the = reason, it appear to slowly get better.

 

I did notice that there did not = seem to be much difference in engine coolant temp going into and out of the engine, = but then not knowing the engine run rpm for that graph its hard to say = – looked like about a 5F increase.  Are you using a stock water = pump/pulley or something different?

 

Looks very = promising!!!!!

 

Ed

 

 

 

 

 

Ed Anderson

Rv-6A N494BW Rotary = Powered

Matthews, NC

eanderson@carolin= a.rr.com

http://www.andersonee.com

http://members.cox.net/rogersda/rotary/configs.htm#N494BW

http://www.dmack.net/mazda/index.html<= font size=3D2 face=3DArial>

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Bill Schertz
Sent: Tuesday, September = 23, 2008 9:52 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = Vacuum Pulses

 

I am new at this engine running thing, having just = done the third start/run . I have some instrumentation, and am enclosing a plot = of Manifold pressure and Fuel pressure vs. time for the latest run. After = letting it warm up at ~14 in MP , I started increasing the power, and you can = see that the fuel pressure increases with the MP.  Made one brief excursion = to ~5900 rpm, swinging a 76x76 prop.

 

All tests so far are with the cowl off, but the ducts = are in place.

 

More tests tomorrow. Longer run, move to higher rpm, = test cooling system more

Bill Schertz
KIS Cruiser #4045
N343BS

----- Original Message ----- =

From: Al = Gietzen

Sent: = Tuesday, September 23, 2008 8:51 PM

Subject: = [FlyRotary] Re: Vacuum Pulses

 

Al, after giving some = thought about the directions that came with the Mallory pressure regulator, it states = that if you are not using a turbo or some other boost device, to just leave the = vacuum port open on the regulator, which may be my best option, as  don't = think I have any need to leave it hooked up.  No sudden acceleration of = engine anticipated.  I plan on doing the orifices for the EC2 = though.  JohnD

 

Yes, I agree.  I started out = with a unit that was not pressure referenced; for the same reason – = NA.  But it turned out that Tracy’s EC2 was setup with the assumption of MAP referenced pressure, and I had = trouble getting it tuned.  So I replaced the regulator.  This was in = the early days of the EC2; maybe that more recent versions will tune fine = without MAP reference.

 

Al



__________ Information from ESET NOD32 Antivirus, version of virus = signature database 3267 (20080714) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com

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