X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail28.syd.optusnet.com.au ([211.29.133.169] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTPS id 1006449 for flyrotary@lancaironline.net; Sat, 18 Jun 2005 18:41:31 -0400 Received-SPF: none receiver=logan.com; client-ip=211.29.133.169; envelope-from=lendich@optusnet.com.au Received: from george (d220-236-0-190.dsl.nsw.optusnet.com.au [220.236.0.190]) by mail28.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j5IMefT6026199 for ; Sun, 19 Jun 2005 08:40:42 +1000 Message-ID: <001b01c57457$83273a10$be00ecdc@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: re-drive question for George and Richard Date: Sun, 19 Jun 2005 08:46:05 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0018_01C574AB.5489E500" 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_0018_01C574AB.5489E500 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageThanks Richard! George, yes, the 85lb is just the block as it is running now. The FF, dry, = will be 170lb. Keep in mind it is 12A based. The 13B based will be a bit = heavier. Richard Sohn N-2071U Rusty, 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_0018_01C574AB.5489E500 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Thanks Richard!
George,
 
yes, the 85lb is just the block as it = is running=20 now. The FF, dry, will be 170lb. Keep in mind it is 12A based. The 13B = based=20 will be a bit heavier.
 
 
Richard Sohn
N-2071U
 
 

Rusty,
I compared my weights with yours, = I'm using=20 some old bathroom scales (accuracy is suspect) but we agree ( more = or less)=20 on the 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=20 to much.
Here's hoping your right, like I = said I like=20 your figures sound better than mine.
Did you see Richard's weight claim = 85 lbs, but=20 I 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=20 your figures better Rusty. Don't tell me = oil!!
George ( = down=20 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=20 lbs, and rounded that up to 230 lbs to be conservative. =20
 
Cheers,
Rusty
 
 
 

13B parts:

 

Front iron housing- 23 lbs

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

Rear iron housing- 27 lbs

Each rotor = housing- 13=20 lbs

Each rotor = with seals- 10=20 lbs 9 oz

Water pump = housing- 3 lb 2=20 oz

Water pump- 5 = lbs=20 9oz

Eccentric shaft- 14 lbs  (estimate=20 a 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. =20 The total of these items is rounded to 66 lbs.  That brings the base = engine weight=20 to 124 lbs.  Aside from the = redrive,=20 which will be the same, the rest of the weight will be literally = half of=20 the 13B installation weight for other items.  We often claim 330 lbs = FWF for a=20 13B.  If the basic = engine=20 weighs 190 lbs, then the =93other=94 stuff weighs 140 lbs.  If the redrive is 45, then the = items that=20 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=20 accessory weight.  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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