Return-Path: <13brv3@bellsouth.net> Received: from imf24aec.mail.bellsouth.net ([205.152.59.72] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 563682 for flyrotary@lancaironline.net; Sat, 11 Dec 2004 20:11:59 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.72; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf24aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20041212011130.DDBV2421.imf24aec.mail.bellsouth.net@rd> for ; Sat, 11 Dec 2004 20:11:30 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Serious single rotor questions Date: Sat, 11 Dec 2004 19:11:49 -0600 Message-ID: <000b01c4dfe7$8e7aabe0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000C_01C4DFB5.43E03BE0" 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_000C_01C4DFB5.43E03BE0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable I did some measuring, and weighing of parts today, and I'm getting more = and more excited about this. Here's my measurements, and logic. When = Bernie saves me a bunch of weight with the fan, I'll be in great shape :-) =20 Rusty (thinking I have a 912S for sale) =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. As a rough = estimate, let's say the other necessary accessories for a total installed weight = will be half as much for a single rotor. We often claim 330 lbs FWF for a = 13B. If the basic engine weighs 190 lbs, then the "other" stuff weighs 140 = lbs. If I add half of this (70 lbs), to the estimated weight of the single = rotor engine, that brings the total to 194 lbs. This is not too far from the = full installed weight of a 912S, which is probably around the 175 lb mark. = So far, it's sounding promising, even with no extraordinary weight saving measures. Affordable aluminum end housing would sure be nice though. =20 ------=_NextPart_000_000C_01C4DFB5.43E03BE0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message
I did some measuring, and weighing of parts = today, and=20 I'm getting more and more excited about this.  Here's my = measurements, and=20 logic.  When Bernie saves me a bunch of weight with the fan, I'll = be in=20 great shape :-)
 
Rusty (thinking I have a 912S for=20 sale)
 

 

 

13B parts:

 

Front iron housing- 23 lbs

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

Rear iron housing- 27 lbs

Each rotor housing- 13=20 lbs

Each rotor with seals- 10 lbs 9=20 oz

Water pump housing- 3 lb 2=20 oz

Water pump- 5 lbs=20 9oz

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

 

A bare 13B = engine is=20 known to weigh 190 lbs.  = The items=20 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.  As a = rough=20 estimate, let’s say the other necessary accessories for a total = installed weight=20 will be half as much for a single rotor. =20 We often claim 330 lbs FWF for a 13B.  If the basic engine weighs 190 = lbs, then=20 the “other” stuff weighs 140 lbs. =20 If  I add half of = this (70=20 lbs), to the estimated weight of the single rotor engine, that brings = the total=20 to 194 lbs.  This is not = too far=20 from the full installed weight of a 912S, which is probably around the = 175 lb=20 mark.  So far, it’s = sounding=20 promising, even with no extraordinary weight saving measures.  Affordable aluminum end housing would = sure be=20 nice though.  =20

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