Return-Path: <13brv3@bellsouth.net> Received: from imf20aec.mail.bellsouth.net ([205.152.59.68] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 563624 for flyrotary@lancaironline.net; Sat, 11 Dec 2004 18:06:34 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.68; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf20aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20041211230605.TIAQ1976.imf20aec.mail.bellsouth.net@rd> for ; Sat, 11 Dec 2004 18:06:05 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Serious single rotor questions (serious??) Date: Sat, 11 Dec 2004 17:06:24 -0600 Message-ID: <000201c4dfd6$091bd1b0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0003_01C4DFA3.BE8161B0" 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 V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0003_01C4DFA3.BE8161B0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable to build a direct drive fan. I have one that I ground tested for 150 = cycles at 6800 rpm with a tired 13B. It would be a snap to do a 100 mph fan. = Mine's design point was for 250 mph with the inherent penalties as low speed. I can send you a picture if you're interested. Bernie OK, hat's off, I'm listening :-) =20 =20 I'd love to see pictures of what you're talking about. My uninformed understanding of "fans" was that they were good for cruise speed, but = not climb thrust. I just never imagined one running on a 40-100 mph plane, which is why I didn't take Thomas' post as seriously as maybe I should = have. Would it be lighter than a PSRU and prop? Would it even fit on a = SlingShot? I just have no concept of what you're proposing, but I'm now mighty interested. =20 Thanks (to Thomas too) Rusty (weighing engine parts, and planning cooler locations) =20 ------=_NextPart_000_0003_01C4DFA3.BE8161B0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message

to build a direct drive fan. I have one that I ground = tested for=20 150 cycles at 6800 rpm with a tired 13B. It would be a snap to do a 100 = mph fan.=20 Mine's design point was for 250 mph with the inherent penalties as low=20 speed.

I can send you a picture if you're=20 interested.

Bernie

OK, = hat's off, I'm=20 listening :-) 
 
I'd love = to see pictures=20 of what you're talking about.  My uninformed understanding of = "fans"=20 was that they were good for cruise speed, but not climb thrust.  I = just=20 never imagined one running on a 40-100 mph plane, which is why I didn't = take=20 Thomas' post as seriously as maybe I should have.  Would it be = lighter=20 than a PSRU and prop?  Would it even fit on a SlingShot?  I = just have=20 no concept of what you're proposing, but I'm now mighty=20 interested.
 
Thanks = (to Thomas=20 too)
Rusty = (weighing engine=20 parts, and planning cooler=20 locations)  
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