X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from sccmmhc91.asp.att.net ([204.127.203.211] verified) by logan.com (CommuniGate Pro SMTP 5.1.9) with ESMTP id 2093702 for flyrotary@lancaironline.net; Sat, 09 Jun 2007 16:06:26 -0400 Received-SPF: none receiver=logan.com; client-ip=204.127.203.211; envelope-from=btilley@mchsi.com Received: from [192.168.1.101] (12-218-75-32.client.mchsi.com[12.218.75.32]) by sccmmhc91.asp.att.net (sccmmhc91) with SMTP id <20070609200545m9100d23ine>; Sat, 9 Jun 2007 20:05:50 +0000 Mime-Version: 1.0 (Apple Message framework v752.3) In-Reply-To: References: Content-Type: multipart/alternative; boundary=Apple-Mail-1--898594872 Message-Id: From: Bob Tilley Subject: Re: [FlyRotary] Re: Single rotor video Date: Sat, 9 Jun 2007 16:05:51 -0400 To: "Rotary motors in aircraft" X-Mailer: Apple Mail (2.752.3) --Apple-Mail-1--898594872 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Hey Lynn, I think we need to set up a secret SELL THE GYRO society! Just to keep all our friends from hurting themselves. Bob On Jun 9, 2007, at 11:09 AM, Lehanover@aol.com wrote: > This could just be silly, but how about reducing the torque the > engine can produce at lower revs, by backing off the timing and > over-leaning the injection system. Once through the problem RPM, > then back to ideal power settings. Sell the gyro. We raced on 20 > degrees > BTDC both leading and trailing for years. Idle settings as low as > 13 degrees leading and 5 ATDC trailing have been used. > > The idea of running with no pitch was to eliminate blade stiffness > as a part of the problem. > > A friend had one of those props on his ultra-light and it touched > the chassis on run up, where the wood prop of the same diameter did > not. > > He cut off two inches and all was well. But they are very flexible. > > Lynn E. Hanover > > > > > > > > > > > > > Sell the Gyro > > --Apple-Mail-1--898594872 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=ISO-8859-1 Hey Lynn,

I think we need to set up a = secret SELL THE GYRO society!=A0 Just to keep all our friends from = hurting themselves.

Bob


On Jun 9, = 2007, at 11:09 AM, Lehanover@aol.com = wrote:
This could just be = silly, but how about reducing the torque the engine can produce at lower = revs, by backing off the timing and over-leaning the injection system. = Once through the problem RPM, then back to ideal power settings. Sell = the gyro. We raced on 20 degrees
BTDC both leading and = trailing for years. Idle settings as low as 13 degrees leading and 5 = ATDC trailing have been used.
=A0
The idea of = running with no pitch was to eliminate blade stiffness as a part of the = problem.
=A0
A friend had one of those props on = his ultra-light and it touched the chassis on run up, where the wood = prop of the same diameter did not.
=A0
=A0He cut = off two inches and all was well. But they are very flexible. =A0
=
=A0
Lynn E. Hanover
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=A0
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=A0
=A0
=A0
=A0
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=A0
=A0
=A0
=A0
=
=A0
Sell the Gyro=A0=A0



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