X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: <13brv3@bellsouth.net> Received: from imf22aec.mail.bellsouth.net ([205.152.59.70] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 1005837 for flyrotary@lancaironline.net; Fri, 17 Jun 2005 23:10:21 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.70; envelope-from=13brv3@bellsouth.net Received: from ibm67aec.bellsouth.net ([65.6.194.9]) by imf22aec.mail.bellsouth.net with ESMTP id <20050618030936.FBDQ16779.imf22aec.mail.bellsouth.net@ibm67aec.bellsouth.net> for ; Fri, 17 Jun 2005 23:09:36 -0400 Received: from rd ([65.6.194.9]) by ibm67aec.bellsouth.net with ESMTP id <20050618030936.ZNKD11273.ibm67aec.bellsouth.net@rd> for ; Fri, 17 Jun 2005 23:09:36 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: re-drive question for George and Richard Date: Fri, 17 Jun 2005 22:09:35 -0500 Message-ID: <000001c573b3$2825e700$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C57389.3F4FDF00" 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 V6.00.2900.2527 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C57389.3F4FDF00 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable I would like to know where I went wrong or what I forgot to omit as I = like your figures better Rusty. Don't tell me oil!! George ( down under)=20 =20 Well, mine's still just an estimate too, but not for much longer :-)=20 =20 Below is how I estimated it in my log. These are 2nd gen weights BTW, = not REW, which are a bit lighter I think. As you can see, I calculated = 216.5 lbs, and rounded that up to 230 lbs to be conservative. =20 =20 Cheers, Rusty=20 =20 =20 =20 13B parts: =20 Front iron housing- 23 lbs Center iron housing- 28 lbs (with dipstick and filler tube) Rear iron housing- 27 lbs Each rotor housing- 13 lbs Each rotor with seals- 10 lbs 9 oz Water pump housing- 3 lb 2 oz Water pump- 5 lbs 9oz Eccentric shaft- 14 lbs (estimate a single rotor would be 5.5 lbs less) =20 A bare 13B engine is known to weigh 190 lbs. The items in red above = would be removed from this base weight. The total of these items is rounded = to 66 lbs. That brings the base engine weight to 124 lbs. Aside from the redrive, which will be the same, the rest of the weight will be = literally half of the 13B installation weight for other items. We often claim 330 = lbs FWF for a 13B. If the basic engine weighs 190 lbs, then the "other" = stuff weighs 140 lbs. If the redrive is 45, then the items that can be cut in half weighs 95 lbs. So, the single rotor engine is 124, plus 45 for = the redrive, and 47.5 for half of the accessory weight. This is a total of 216.5 lbs. If Racing Beat ever finishes their aluminum housings, this = would be around 190 lbs. =20 ------=_NextPart_000_0001_01C57389.3F4FDF00 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
I would=20 like to know where I went wrong or what I forgot to omit as I like your = figures=20 better Rusty. Don't tell me oil!!
George ( down = under) 
 
Well, mine's still just = an estimate=20 too, but not for much longer :-) 
 
Below is how I=20 estimated it in my log.  These are 2nd gen weights BTW, not = REW, which=20 are a bit lighter I think.  As you can see, I calculated 216.5 lbs, = and=20 rounded that up to 230 lbs to be conservative. =20
 
Cheers,
Rusty
 
 
 

13B=20 parts:

 

Front iron housing- 23 lbs

Center iron housing- 28 lbs (with dipstick and = filler=20 tube)

Rear=20 iron housing- 27 lbs

Each rotor housing- 13 = lbs

Each rotor with seals- 10 lbs 9=20 oz

Water pump housing- 3 lb 2=20 oz

Water pump- 5 lbs = 9oz

Eccentric shaft- 14 lbs  (estimate a=20 single rotor would be 5.5 lbs less)

 

A=20 bare 13B engine is known to weigh 190 lbs. =20 The items in red above would be removed from this base = weight.  The total of these items is = rounded to=20 66 lbs.  That brings the = base engine=20 weight to 124 lbs.  Aside from = the redrive,=20 which will be the same, the rest of the weight will be literally half of = the 13B=20 installation weight for other items.  We often claim 330 lbs FWF for = a=20 13B.  If the basic engine = weighs 190=20 lbs, then the “other” stuff weighs 140 lbs.  If the redrive is 45, then the items = that can=20 be cut in half weighs 95 lbs.   So, the single rotor = engine is=20 124, plus 45 for the redrive, and 47.5 for half of the accessory = weight. =20 This is a total of 216.5 lbs.  If Racing Beat ever finishes = their=20 aluminum housings, this would be around 190 lbs. =20   
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