X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [216.211.128.10] (HELO mail-in03.adhost.com) by logan.com (CommuniGate Pro SMTP 5.1c.4) with ESMTP id 1401215 for flyrotary@lancaironline.net; Wed, 13 Sep 2006 11:10:18 -0400 Received-SPF: none receiver=logan.com; client-ip=216.211.128.10; envelope-from=joeh@pilgrimtech.com Received: from Pilgrim10 (c-67-183-14-47.hsd1.wa.comcast.net [67.183.14.47]) by mail-in03.adhost.com (Postfix) with ESMTP id B44A32A8831 for ; Wed, 13 Sep 2006 08:09:36 -0700 (PDT) (envelope-from joeh@pilgrimtech.com) From: "Joe Hull" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] XR-40 Date: Wed, 13 Sep 2006 08:09:21 -0700 Message-ID: <003501c6d746$99e2ad90$bb02a8c0@redmond.corp.microsoft.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0036_01C6D70B.ED83D590" X-Mailer: Microsoft Office Outlook 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2962 Thread-Index: AcbXQ9mXBN7HRFDySdmtGENeVq9InQAAil9w In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0036_01C6D70B.ED83D590 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit It looks interesting. Are they sure about that 55 lb weight?? They're getting pretty close to a 1:1 ratio weight to HP. (Wish I could get that with mine! :-) ) One thing for sure, they are doing it right: Sell a FWF package (except I didn't see anything about an engine mount). Joe Hull Cozy Mk-IV N31CZ (65 hrs - Rotary 13B NA) Redmond (Seattle), Washington _____ From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Russell Duffy Sent: Wednesday, September 13, 2006 7:49 AM To: Rotary motors in aircraft Subject: [FlyRotary] XR-40 Greetings, Has anyone looked at the XR-40 engine that the Phantom guys are testing? http://www.rotary-xr40.com/ As I understand it, these are go kart engines that normally run up to 10,000 rpm, and make about 52 HP. For aircraft use, they are derating them to 40 HP at 7600 rpm. I'm not in the market for this, but I noticed in the FAQ that they don't have a pressure feed oil system. Instead, they use roller bearings, and 50:1 pre-mix. That would sure save some weight, and complexity. Has that ever been done on other rotary engines? Cheers, Rusty ------=_NextPart_000_0036_01C6D70B.ED83D590 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message

It looks interesting. Are they sure = about that 55 lb weight?? They’re getting pretty close to a 1:1 ratio = weight to HP. (Wish I could get that with mine! J )

 

One thing for sure, they are doing = it right: Sell a FWF package (except I didn’t see anything about an = engine mount).

 

Joe = Hull

Cozy Mk-IV N31CZ (65 hrs - Rotary = 13B NA)

Redmond (Seattle), Washington

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Russell Duffy
Sent: Wednesday, = September 13, 2006 7:49 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] = XR-40

 

Greetings,

 

Has anyone looked at the XR-40 engine that the = Phantom guys are testing?  http://www.rotary-xr40.com/ = ;  As I understand it, these are go kart engines that normally run up to = 10,000 rpm, and make about 52 HP.  For aircraft use, they are derating = them to 40 HP at 7600 rpm. 

 

I'm not in the market for this, but I noticed in the = FAQ that they don't have a pressure feed oil system.  Instead, they use = roller bearings, and 50:1 pre-mix.  That would sure save some weight, and complexity.  Has that ever been done on other rotary = engines?

 

Cheers,

Rusty

 

 

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