X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail23.syd.optusnet.com.au ([211.29.133.164] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTPS id 1005916 for flyrotary@lancaironline.net; Sat, 18 Jun 2005 02:19:02 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.133.164; envelope-from=lendich@optusnet.com.au Received: from george (d220-236-0-190.dsl.nsw.optusnet.com.au [220.236.0.190]) by mail23.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j5I6ICuO008253 for ; Sat, 18 Jun 2005 16:18:13 +1000 Message-ID: <003201c573ce$421e33e0$be00ecdc@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: re-drive question for George and Richard Date: Sat, 18 Jun 2005 16:23:35 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002F_01C57422.13793DB0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_002F_01C57422.13793DB0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageRusty, I compared my weights with yours, I'm using some old bathroom scales = (accuracy is suspect) but we agree ( more or less) on the engine weight = savings. I didn't take into consideration the savings on radiator, rad fluid, oil = or accessories as I didn't think that would amount to much. Here's hoping your right, like I said I like your figures sound better = than mine. Did you see Richard's weight claim 85 lbs, but I doubt if that's an all = up wet weight. I did notice he had a aluminium end housing ( front) and = a small PSRU. Richard you wouldn't have al all up wet weight would you - it's looking = good. I'm guessing 185lbs! George ( down under) 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 Well, mine's still just an estimate too, but not for much longer :-)=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 Cheers, Rusty=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. ------=_NextPart_000_002F_01C57422.13793DB0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Rusty,
I compared my weights with yours, I'm = using some=20 old bathroom scales (accuracy is suspect) but we agree ( more or less) = on the=20 engine weight savings.
I didn't take into consideration the = savings on=20 radiator, rad fluid, oil or accessories as I didn't think that would = amount to=20 much.
Here's hoping your right, like I said I = like your=20 figures sound better than mine.
Did you see Richard's weight claim 85 = lbs, but I=20 doubt if that's an all up wet weight. I did notice he had a aluminium = end=20 housing ( front) and a small PSRU.
Richard you wouldn't have al all up wet = weight=20 would you - it's looking good. I'm guessing 185lbs!
George ( down under)
I=20 would like to know where I went wrong or what I forgot to omit as I = like your=20 figures better Rusty. Don't tell me oil!!
George ( down = under) 
 
Well, mine's still = just an=20 estimate too, but not for much longer=20 :-) 
 
Below is how I=20 estimated it in my log.  These are 2nd gen weights BTW, not = REW,=20 which are a bit lighter I think.  As you can see, I calculated = 216.5 lbs,=20 and rounded that up to 230 lbs to be conservative. =20
 
Cheers,
Rusty
 
 
 

13B parts:

 

Front iron housing- 23 lbs

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

Rear 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.  The items in red above would = be=20 removed from this base weight.  = The total of these items is rounded to 66 lbs.  That brings the base engine = weight to=20 124 lbs.  Aside from the = redrive, which=20 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=20 190 lbs, then the =93other=94 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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