X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from qw-out-2122.google.com ([74.125.92.27] verified) by logan.com (CommuniGate Pro SMTP 5.3.3) with ESMTP id 4151015 for flyrotary@lancaironline.net; Wed, 03 Mar 2010 13:53:53 -0500 Received-SPF: pass receiver=logan.com; client-ip=74.125.92.27; envelope-from=rwstracy@gmail.com Received: by qw-out-2122.google.com with SMTP id 8so409726qwh.25 for ; Wed, 03 Mar 2010 10:53:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:received:in-reply-to :references:date:x-google-sender-auth:message-id:subject:from:to :content-type; bh=Xl+k4XCb1NUBpCqmAAcJfu9ZiVPYR8Bnk9pYaZQuVVE=; b=NZnhomXCCl5vlHM8cVlnYphBcQ9AIWXVmnBANSbDo6Uw5tALdgQcj2TcqG1NMl3bJO tS4GPO1mAkIaDU1ihRXANYsbEYERQNXJjVGocChP/0YWgNdnbZ6gd0QTsNL4I0XdBrIp EMF5r5p9aXRAWrTpPDPWIi9M8hW5orx5tu2b4= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; b=cjdzVakrH2k1oyzPI4LVwjud+ZCcuUEKXFZTQB+3YX4xepEx1xUYamO9RtpueyBzF5 jPxqFKa7cyImGm9xF65ACa3jfIrkJFjLYfb7QhMOfT0cl1P7SWZvmyvpJc0fbRuYYFJp yT+5oOIQWtkFiNF5BvNBxrlBa2VSLXEQoQctk= MIME-Version: 1.0 Sender: rwstracy@gmail.com Received: by 10.224.91.144 with SMTP id n16mr4660634qam.316.1267642370509; Wed, 03 Mar 2010 10:52:50 -0800 (PST) In-Reply-To: References: Date: Wed, 3 Mar 2010 10:52:45 -0800 X-Google-Sender-Auth: 30d02679b4821c44 Message-ID: <1b4b137c1003031052q5833fc81m1abd9e7af1c43792@mail.gmail.com> Subject: Re: [FlyRotary] Re: single rotor From: Tracy Crook To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=00c09f99e37a377d7b0480e9fd28 --00c09f99e37a377d7b0480e9fd28 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable "it takes 1.6 times as much horsepower to develop 1.18 times as much static thrust! " I didn't study the site but just this statement is ludicrous. It takes NO horsepower to generate static thrust. A freek'n spring will make static thrust. For our purposes, static thrust is not a useful term and sometimes a dangerous one. Steve (?) Parkman died many years ago mainly because he set his engine and prop up for best static thrust on his airplane prior to his first flight. Tracy Crook On Wed, Mar 3, 2010 at 9:18 AM, Bill Bradburry wr= ote: > Looking at the two sizes of the engine, it takes 1.6 times as much > horsepower to develop 1.18 times as much static thrust! Somehow this doe= s > not compute for me=85.I always doubt the performance figures in a sales > presentation and when they don=92t make sense to me=85..??? > > > > Bill B (hoping this generates an educational experience for me :>) ) > > > ------------------------------ > > *From:* Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] *O= n > Behalf Of *Mike Wills > *Sent:* Tuesday, March 02, 2010 11:10 PM > *To:* Rotary motors in aircraft > *Subject:* [FlyRotary] single rotor > > A friend of mine flies a powered paraglider (PPG). He attended a flyin la= st > month and saw this: > > > > http://www.flycyclone.com/range/category/294cc_Everest/ > > > > It's a single rotor liquid cooled rotary and available in several differe= nt > displacements. Do a little web surfing and you'll find some pretty cool > videos of guys flying PPGs powered by this. > > > > Mike Wills > --00c09f99e37a377d7b0480e9fd28 Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable
"it takes 1.6 times as much horsepower to develop 1.18 times as m= uch static thrust!=A0"
=A0
I didn't study the site but just this statement is ludicrous.=A0 I= t takes NO horsepower to generate static thrust.=A0 A freek'n spring wi= ll make static thrust.=A0 For our purposes, static thrust is not a useful t= erm and sometimes a dangerous one.=A0 Steve (?)=A0Parkman=A0 died many year= s ago mainly because he=A0set his=A0engine and prop up for best=A0static th= rust on his=A0airplane pri= or to his first flight.
=A0
Tracy Crook

On Wed, Mar 3, 2010 at 9:18 AM, Bill Bradburry <= span dir=3D"ltr"><bbradburry= @bellsouth.net> wrote:

Looking at the two sizes of the engine, it takes 1.6 = times as much horsepower to develop 1.18 times as much static thrust!=A0 So= mehow this does not compute for me=85.I always doubt the performance figure= s in a sales presentation and when they don=92t make sense to me=85..???

=A0

Bill B (hoping this generates an educational experien= ce for me=A0 :>)=A0 )

=A0

From: Rotary motors in aircraft [ma= ilto:flyro= tary@lancaironline.net] On Behalf = Of Mike Wills
Sent: Tuesday, March 02, 20= 10 11:10 PM
To: Rotary m= otors in aircraft
Subject: [FlyRotary] single rotor

A friend of mine flies a powered paragl= ider (PPG). He attended a flyin last month and saw this:

<= /div>

=A0

=A0

It's a single rotor liquid cooled r= otary and available in several different displacements. Do a little web sur= fing and you'll find some pretty cool videos of guys flying PPGs powere= d by this.

=A0

Mike Wills


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