Return-Path: Received: from frontend1.cwpanama.net ([201.225.225.167] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 563450 for flyrotary@lancaironline.net; Sat, 11 Dec 2004 14:39:59 -0500 Received-SPF: none receiver=logan.com; client-ip=201.225.225.167; envelope-from=rijakits@cwpanama.net Received: from [201.224.93.110] (HELO usuarioq3efog0) by frontend1.cwpanama.net (CommuniGate Pro SMTP 4.2.1) with SMTP id 32860623 for flyrotary@lancaironline.net; Sat, 11 Dec 2004 14:39:27 -0500 Message-ID: <006501c4dfb9$14059330$6e5de0c9@usuarioq3efog0> From: "rijakits" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Serious single rotor questions Date: Sat, 11 Dec 2004 14:39:05 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0061_01C4DF8F.2A26CDC0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2741.2600 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2742.200 This is a multi-part message in MIME format. ------=_NextPart_000_0061_01C4DF8F.2A26CDC0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit MessageRussel, just pushing at the "masochist" in you: Why don't you investigate the possibilities of running an unducted fan, no PSRU needed. :)) Diving for cover - Thomas J. ----- Original Message ----- From: Russell Duffy To: Rotary motors in aircraft Sent: Saturday, December 11, 2004 2:10 PM Subject: [FlyRotary] Serious single rotor questions Greetings, As I've mentioned, I recently purchased a Kolb with a 912ULS engine. Since I've mentioned the rotary engine possibility on the Kolb list, I've had 3 people ask if I would sell the 912ULS. Now that I find out how much the engine is worth, I'm seriously thinking about selling it, and going ahead with the single rotor engine. Questions: - Where can I get a single rotor eccentric shaft? I'm thinking that the only ones running now were cut down from 13B shafts, which I understand is a mighty tough job. - Folks have done plugs-up engines, but has anyone ever done a plugs-down engine? Do you see any reason why it wouldn't work as well as plugs-up? Having the intake and exhaust on top would be the best arrangement, but it won't be possible to do this unless I can get a planetary drive unit to keep the prop in the center of the engine. - What is available for light weight PSRU's? I know that Richard is using a Hirth gearbox, which is a good idea. There must be some belt drive units available as well. The biggest problem is that most of these units that would fit, are made for a 13B, so they're much heavier than they need to be for a single rotor. I'd like to stay with a high gear ratio, since I'd plan to run the engine at higher rpms. - Lot's more questions if I decide to do this. Thanks, Rusty (could I possibly be this much of a masochist) ------=_NextPart_000_0061_01C4DF8F.2A26CDC0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Russel,
 
just pushing at the "masochist" in you: Why = don't you=20 investigate the possibilities of running an unducted fan, no PSRU = needed.=20 :))
 
Diving for cover - Thomas J.
----- Original Message -----
From:=20 Russell=20 Duffy
Sent: Saturday, December 11, = 2004 2:10=20 PM
Subject: [FlyRotary] Serious = single rotor=20 questions

Greetings,
 
As I've = mentioned, I=20 recently purchased a Kolb with a 912ULS engine.  Since I've = mentioned the=20 rotary engine possibility on the Kolb list, I've had 3 people ask if I = would=20 sell the 912ULS.   Now that I find out how much the engine = is worth,=20 I'm seriously thinking about selling it, and going ahead with the = single rotor=20 engine. 
 
Questions:
 
- Where can I = get a=20 single rotor eccentric shaft?  I'm thinking that the only ones = running=20 now were cut down from 13B shafts, which I understand is a mighty = tough=20 job. 
 
- Folks have = done=20 plugs-up engines, but has anyone ever done a plugs-down engine?  = Do you=20 see any reason why it wouldn't work as well as=20 plugs-up?  Having the intake and exhaust on top would be the = best=20 arrangement, but it won't be possible to do this unless I can get a = planetary=20 drive unit to keep the prop in the center of the=20 engine.  
 
- What is = available for=20 light weight PSRU's?  I know that Richard is using a Hirth = gearbox, which=20 is a good idea.  There must be some belt drive units available as = well.  The biggest problem is that most of these units that would = fit,=20 are made for a 13B, so they're much heavier than they need to be for a = single=20 rotor.   I'd like to stay with a high gear ratio, since I'd = plan to=20 run the engine at higher rpms.
 
- Lot's more = questions if=20 I decide to do this.
 
Thanks,=20
Rusty (could = I possibly=20 be this much of a = masochist)
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