X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from wx-out-0506.google.com ([66.249.82.233] verified) by logan.com (CommuniGate Pro SMTP 5.1c.4) with ESMTP id 1407482 for flyrotary@lancaironline.net; Sun, 17 Sep 2006 21:13:23 -0400 Received-SPF: pass receiver=logan.com; client-ip=66.249.82.233; envelope-from=russell.duffy@gmail.com Received: by wx-out-0506.google.com with SMTP id i29so3719740wxd for ; Sun, 17 Sep 2006 18:12:44 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:from:to:subject:date:message-id:mime-version:content-type:x-priority:x-msmail-priority:x-mailer:importance:in-reply-to:x-mimeole; b=o20/gYev7RlSHu4p8YtQNdIiMUmRQ205DhnNAdRPcFcEjUnoLrqvTRhb4l3Fz3CA+l0MsrDxc4lSDnmXkAi0vQ8P68dqOw0xP6gkkNaDHoI7RaR57nweLUact3tJRFwb5aOzGfee3WNiQLa2Mcv2hfjUbs0TORSGx+O/cfSVVdc= Received: by 10.70.117.3 with SMTP id p3mr9269380wxc; Sun, 17 Sep 2006 18:12:44 -0700 (PDT) Return-Path: Received: from rd ( [65.6.194.9]) by mx.gmail.com with ESMTP id 12sm4278437wrl.2006.09.17.18.12.43; Sun, 17 Sep 2006 18:12:43 -0700 (PDT) From: "Russell Duffy" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: ducted fan questions Date: Sun, 17 Sep 2006 20:12:42 -0500 Message-ID: <000001c6dabf$8b650520$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C6DA95.A28EFD20" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C6DA95.A28EFD20 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Rusty, I arrived at the same conclusion regarding the propulsion of a gyro copter about 20 years ago. The results of my efforts were a single = seat gyro with a KAWA 440 engine driving a ducted fan(not a shrouded = propeller). =20 Now that's just way too cool Richard :-) =20 =20 Was the fan running directly off the engine, with no redrive? Did you = feel that the performance was better than it would have been with a = traditional redrive and prop? If I get serious about trying this, I'll certainly = take you up on your offer to share info. =20 =20 Since I haven't been able to come up with the perfect "next project" for = the single rotor, I'm thinking about buying one of those cheap (less than = $200) Harbor Freight trailers, and setting it up as a mobile engine stand. = That will let me work on it at home, then hook it to the truck to take it to = the airport to run. Until I come up with a redrive, or ducted fan that = works, there's really no point in putting it on an aircraft of any type, since = the mounting will likely change with any change to the drive. I've also = got an Ellison EFS-4 to test in comparison to the EC-2. =20 =20 I think my wife is hoping I'll get my kicks tinkering with the engine, = and won't actually build another aircraft. Silly woman :-)=20 =20 Cheers, Rusty =20 ------=_NextPart_000_0001_01C6DA95.A28EFD20 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Hi Rusty, I arrived at the = same=20 conclusion regarding the propulsion of a gyro copter about 20 years ago. = The=20 results of my efforts were a single seat gyro with a KAWA 440 engine = driving a=20 ducted fan(not a shrouded propeller).  
 
Now that's just way too cool Richard=20 :-)  
 
Was the fan running directly off the = engine, with no=20 redrive?  Did you feel that the performance was better than it = would have=20 been with a traditional redrive and prop?  If I get = serious about=20 trying this, I'll certainly take you up on your offer to share=20 info.   
 
Since I haven't been able to come up with the = perfect "next=20 project" for the single rotor, I'm thinking about buying one of those = cheap=20 (less than $200) Harbor Freight trailers, and setting it up as a mobile = engine=20 stand.  That will let me work on it at home, then hook it to the = truck to=20 take it to the airport to run.  Until I come up with a = redrive,=20 or ducted fan that works, there's really no point in putting it on an = aircraft=20 of any type, since the mounting will likely change with any change to = the=20 drive.   I've also got an Ellison EFS-4 to test in=20 comparison to the EC-2.  
 
I think my wife is hoping I'll get my=20 kicks tinkering with the engine, and won't actually build = another=20 aircraft.  Silly woman :-) 
 
Cheers,
Rusty
 
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