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 5.4.0) with ESMTP id 5024048 for flyrotary@lancaironline.net; Fri, 17 Jun 2011 19:18:30 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.121; envelope-from=eanderson@carolina.rr.com Return-Path: X-Authority-Analysis: v=1.1 cv=pLPlkKcK38cN4Cv4YkVeTGGRYpmKez/IrX640LVKWnc= c=1 sm=0 a=U39sxd_f5pcA:10 a=rPkcCx1H5rrOSfN0dPC7kw==:17 a=Ia-xEzejAAAA:8 a=ayC55rCoAAAA:8 a=qE3gaD3DdqOTBkf0OFgA:9 a=wPNLvfGTeEIA:10 a=EzXvWhQp4_cA:10 a=pedpZTtsAAAA:8 a=U6CG08jtumK39A7RvxQA:9 a=C-qnYBlTGP9v0Cje5o0A:7 a=eJojReuL3h0A:10 a=rPkcCx1H5rrOSfN0dPC7kw==:117 X-Cloudmark-Score: 0 X-Originating-IP: 174.110.167.5 Received: from [174.110.167.5] ([174.110.167.5:61715] helo=EdPC) by cdptpa-oedge04.mail.rr.com (envelope-from ) (ecelerity 2.2.3.46 r()) with ESMTP id A2/F8-20202-3A0EBFD4; Fri, 17 Jun 2011 23:17:56 +0000 Message-ID: From: "Ed Anderson" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: Blower does work Date: Fri, 17 Jun 2011 19:17:01 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000D_01CC2D23.227092D0" X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 This is a multi-part message in MIME format. ------=_NextPart_000_000D_01CC2D23.227092D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Actually, Ernest had the opposite situation. Too little prop load meant = he could spin it at any "almost" rpm without opening the throttle very = much -ergo low manifold pressure, low power.=20 My impression was that his rpm could have gone much higher - if he had = not had an rpm limiter in his system. When I remove my prop, my engine will spin over 5000 rpm at the normal = idle setting - no load =3D no power required =3D low manifold pressure = required. I am still very eager to see what type of data, Ernest can provide once = the engine is properly loaded when he adjusts the pitch of his prop = blades. Ed From: Bill Bradburry=20 Sent: Friday, June 17, 2011 7:10 PM To: Rotary motors in aircraft=20 Subject: [FlyRotary] Re: Blower does work If the prop load was maxed out, the rpm would not increase, but the MAP = could go up. It sounds, tho, like this might not have been the case = since Earnest felt the prop was not pulling. =20 Bill B =20 -------------------------------------------------------------------------= ------- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On = Behalf Of Tracy Sent: Friday, June 17, 2011 7:01 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Blower does work =20 Why wouldn't you expect the map to go up when you have a blower = pressurizing it? Well, if the MAP was actually higher, the engine would be making more = power. It wasn't because the rpm in both cases was the same. That's = why I'm confused by the graph if it really is MAP ( Manifold Absolute = Pressure) you are measuring. =20 Tracy Sent from my iPad On Jun 17, 2011, at 2:30 PM, Ernest Christley = wrote: Why wouldn't you expect the map to go up when you have a blower = pressurizing it? ------=_NextPart_000_000D_01CC2D23.227092D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Actually, Ernest had the opposite = situation.  Too=20 little prop load meant he could spin it at any "almost" rpm without = opening the=20 throttle very much -ergo low manifold pressure, low = power. 
 
 My impression was that his rpm could have = gone much=20 higher - if he had not had an rpm limiter in his system.
 
When I remove my prop, my engine will spin over = 5000 rpm=20 at the normal idle setting - no load =3D no power required =3D low = manifold pressure=20 required.
 
I am still very eager to see what type of data, = Ernest can=20 provide once the engine is properly loaded when he adjusts the pitch of = his prop=20 blades.
 
Ed

Sent: Friday, June 17, 2011 7:10 PM
Subject: [FlyRotary] Re: Blower does work

If the prop = load was=20 maxed out, the rpm would not increase, but the MAP could go up.  It = sounds,=20 tho, like this might not have been the case since Earnest felt the prop = was not=20 pulling.

 

Bill=20 B

 

From:=20 Rotary motors in aircraft=20 [mailto:flyrotary@lancaironline.net] On=20 Behalf Of Tracy
Sent: Friday, June 17, 2011 7:01=20 PM
To: = Rotary motors in aircraft
Subject: [FlyRotary] Re: Blower = does=20 work

 


Why=20 wouldn't you expect the map to go up when you have a blower pressurizing = it?





Well, if the = MAP was=20 actually higher, the engine would be making more power.  It wasn't = because=20 the rpm in both cases was the same.   That's why I'm confused by = the graph=20 if it really is MAP ( Manifold Absolute Pressure) you are measuring.=20   



Tracy

Sent from my=20 iPad


On Jun 17, = 2011, at=20 2:30 PM, Ernest Christley <echristley@nc.rr.com>=20 wrote:


Why wouldn't you expect the map to go up = when you=20 have a blower pressurizing=20 it?

------=_NextPart_000_000D_01CC2D23.227092D0--