X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fmailhost03.isp.att.net ([204.127.217.103] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTP id 5024490 for flyrotary@lancaironline.net; Sat, 18 Jun 2011 09:19:06 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.217.103; envelope-from=bbradburry@bellsouth.net Received: from desktop (adsl-98-85-106-31.mco.bellsouth.net[98.85.106.31]) by isp.att.net (frfwmhc03) with SMTP id <20110618131830H03002s7r4e>; Sat, 18 Jun 2011 13:18:31 +0000 X-Originating-IP: [98.85.106.31] From: "Bill Bradburry" To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Re: Blower does work Date: Sat, 18 Jun 2011 09:18:32 -0400 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0023_01CC2D98.B24B25D0" X-Mailer: Microsoft Office Outlook 11 Thread-Index: Acwta+j0IZrYampATvKJ7PwpLfwBxAATTfZA X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 This is a multi-part message in MIME format. ------=_NextPart_000_0023_01CC2D98.B24B25D0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hmmm! Unless your blower is a restriction, the MAP will go to ambient pressure (100 Kp?) if you go to WOT. If you fix that prop so that it is moving air, you need to look at some of the pictures of Tracy when he is running his engine! Even his ears are pinned back! :>) Think dog hanging our of a car window at 100 MPH. Sorry Tracy!! :>) You will need to tie that laptop down or it will be in the next county! Bill B _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ernest Christley Sent: Friday, June 17, 2011 11:57 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Blower does work On 06/17/2011 07:10 PM, Bill Bradburry wrote: 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. Bill B First, the prop definitely was not pulling with any significance. The most it could do was scare my wife, and blow over a fan that I had sitting on top of a 5-gallon bucket. I'll fix that this weekend. Second, if the prop limits rpm, the MAP will not continue to increase. The blower is tied to the prop with a 3.18 gear ratio. Since it won't turn any faster, it won't be able to raise the MAP any further. ------=_NextPart_000_0023_01CC2D98.B24B25D0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hmmm!  Unless your blower is a restriction, the MAP will go to ambient pressure (100 Kp?) if you go to = WOT.

 

If you fix that prop so that it is = moving air, you need to look at some of the pictures of Tracy when he is running his = engine!  Even his ears are pinned back!  :>)   Think dog hanging our = of a car window at 100 MPH.  Sorry Tracy!!  :>)

You will need to tie that laptop = down or it will be in the next county!

 

Bill B

 

From: Rotary motors in = aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Ernest Christley
Sent: Friday, June 17, = 2011 11:57 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: = Blower does work

 

On 06/17/2011 07:10 PM, Bill Bradburry wrote:

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.

 

Bill = B

 

First, the prop definitely was not pulling with any significance.  The = most it could do was scare my wife, and blow over a fan that I had sitting on = top of a 5-gallon bucket.  I'll fix that this weekend.

Second, if the prop limits rpm, the MAP will not continue to = increase.  The blower is tied to the prop with a 3.18 gear ratio.  Since it = won't turn any faster, it won't be able to raise the MAP any = further.

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