X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 1 [X] Return-Path: Received: from elasmtp-kukur.atl.sa.earthlink.net ([209.86.89.65] verified) by logan.com (CommuniGate Pro SMTP 5.1.3) with ESMTP id 1655798 for flyrotary@lancaironline.net; Fri, 08 Dec 2006 16:00:41 -0500 Received-SPF: none receiver=logan.com; client-ip=209.86.89.65; envelope-from=jerryhey@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=YTGaUaneq3plQub0GaAZGXOXLCWNpQ5mueixLNx5svKf09TJbkVrOuLHTq7zymNR; h=Received:Mime-Version:In-Reply-To:References:Content-Type:Message-Id:From:Subject:Date:To:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [76.2.80.86] (helo=[192.168.0.101]) by elasmtp-kukur.atl.sa.earthlink.net with asmtp (Exim 4.34) id 1GsmpS-00040I-GB for flyrotary@lancaironline.net; Fri, 08 Dec 2006 16:00:22 -0500 Mime-Version: 1.0 (Apple Message framework v752.3) In-Reply-To: References: Content-Type: multipart/alternative; boundary=Apple-Mail-1-473313856 Message-Id: <6D332E0F-7BD6-4196-89EB-B0F07A75F044@earthlink.net> From: Jerry Hey Subject: Re: [FlyRotary] direct drive Date: Fri, 8 Dec 2006 15:59:51 -0500 To: "Rotary motors in aircraft" X-Mailer: Apple Mail (2.752.3) X-ELNK-Trace: 8104856d7830ec6b1aa676d7e74259b7b3291a7d08dfec7956e9c1ed01d104fc1567c17e2ccb8b11350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 76.2.80.86 --Apple-Mail-1-473313856 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Thanks, I will tell him it will have to be a single rotor or a Continental. Jerry On Dec 8, 2006, at 2:09 PM, Perry Mick wrote: > No, I installed a 2.17 RD-1B in Dec. 2004. Now it's a 62" prop/6400 > engine rpm, used to be 38" fan/5400 RPM. > > I presume a Buttercup is a tractor design? I can't see direct-drive > working in a rotary except in a ducted fan, because the engine just > doesn't develop enough power at 3000 RPM. Maybe with PPorts and > supercharger, and aluminum side housings to reduce weight? > > >Perry are you still using direct drive? What max RPM are you or > >were you using, what prop, etc. A friend who is building a > >Buttercup (Steve Whitman design) that only needs 100/125 hp. 13B > >with redrive is too heavy but without a drive it is a > >possibility. Jerry --Apple-Mail-1-473313856 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=ISO-8859-1 Thanks,=A0 I will tell him it = will have to be a single rotor or a Continental.=A0 = =A0Jerry

On Dec 8, 2006, at 2:09 PM, Perry Mick = wrote:

No, I installed a 2.17 = RD-1B in Dec. 2004. Now it's a 62" prop/6400 engine rpm, used to be 38" = fan/5400 RPM.
=A0
I presume a = Buttercup is a tractor design? I can't see direct-drive working in a = rotary except in a ducted fan, because the engine just doesn't develop = enough power at 3000 RPM. Maybe with PPorts and supercharger, and = aluminum side housings to reduce weight?
=A0
>Perry are you still using direct drive? What max RPM are you or = >were you using, what prop, etc. A friend who is building a = >Buttercup (Steve Whitman design) that only needs 100/125 hp. 13B = >with redrive is too heavy but without a drive it is a = >possibility. = Jerry

= --Apple-Mail-1-473313856--