Return-Path: <13brv3@bellsouth.net> Received: from imf23aec.mail.bellsouth.net ([205.152.59.71] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 564407 for flyrotary@lancaironline.net; Sun, 12 Dec 2004 11:54:54 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.71; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf23aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20041212165440.QXUD2382.imf23aec.mail.bellsouth.net@rd> for ; Sun, 12 Dec 2004 11:54:40 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Serious single rotor questions Date: Sun, 12 Dec 2004 10:55:01 -0600 Message-ID: <000001c4e06b$520f8d90$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C4E039.07778E90" 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_0001_01C4E039.07778E90 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Richard Sohn has one running, but I didn't ask which gear he was using. I'm definitely going to have to drop in on Richard soon :-) Unless you make some of this out of aluminum, there is very little = weight savings over the two rotor.=20 I'm not sure I agree with this. I just posted a list of weights = yesterday, that showed 66 lbs of weight that would be removed from the basic = engine. I forgot to include one of the stationary gears, but since I have to add = the 2 lb EWP, we'll call it even. The external stuff (intake, exhaust, mount, PSRU, coolers, etc) will be far less, approaching half the weight of = what's needed for a typical 13B installation. By my initial calculation = (SWAG), I'll remove about 136 lbs, and bring the installed weight down to 194 = lbs. Aluminum end housings would be nice, but the slingshot can handle this = much engine weight, and it would be interesting to initially do this with all = the stock parts possible. =20 The more I think about this, the more I almost feel destined to try it. = I'm about 95% sure I'll build a single rotor, but the question now is = whether I'll put the SS back together with the 912S while I'm working on the = single. Thanks, Rusty =20 =20 ------=_NextPart_000_0001_01C4E039.07778E90 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Richard Sohn has one running, but I didn't ask which = gear he was=20 using.

I'm = definitely going to=20 have to drop in on Richard soon :-)

Unless you make some of this out of aluminum, there is very little=20 weight
savings over the two rotor. 

I'm not sure I agree with = this.  I=20 just posted a list of weights yesterday, that showed 66 lbs of weight = that would=20 be removed from the basic engine.  I forgot to include one of the=20 stationary gears, but since I have to add the 2 lb EWP, we'll call it=20 even.  The external stuff (intake, exhaust, mount, PSRU, coolers, = etc) will=20 be far less, approaching half the weight of what's needed for a typical = 13B=20 installation.  By my initial calculation (SWAG), I'll remove about = 136 lbs,=20 and bring the installed weight down to 194 lbs.  Aluminum end = housings=20 would be nice, but the slingshot can handle this much engine weight, and = it=20 would be interesting to initially do this with all the stock parts=20 possible.  

The more I think about = this, the more I=20 almost feel destined to try it.  I'm about 95% sure I'll build a = single=20 rotor, but the question now is whether I'll put the SS back together = with the=20 912S while I'm working on the single. 

Thanks,

Rusty

 

 

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