X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from access.aic-fl.com ([204.49.76.2] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 1006018 for flyrotary@lancaironline.net; Sat, 18 Jun 2005 09:00:22 -0400 Received-SPF: none receiver=logan.com; client-ip=204.49.76.2; envelope-from=unicorn@gdsys.net Received: from b9k4u9 (unverified [204.49.76.173]) by access.aic-fl.com (Rockliffe SMTPRA 4.5.6) with SMTP id for ; Sat, 18 Jun 2005 07:53:54 -0500 Message-ID: <002f01c57416$13d13f30$ad4c31cc@b9k4u9> From: "Richard Sohn" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: re-drive question for George and Richard Date: Sat, 18 Jun 2005 07:57:36 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002A_01C573DB.642E86D0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_002A_01C573DB.642E86D0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageGeorge, 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 ----- Original Message -----=20 From: George Lendich=20 To: Rotary motors in aircraft=20 Sent: Friday, June 17, 2005 11:23 PM Subject: [FlyRotary] Re: re-drive question for George and Richard 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 :-) = 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_002A_01C573DB.642E86D0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
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
 
 
----- Original Message -----
From:=20 George=20 Lendich
Sent: Friday, June 17, 2005 = 11:23=20 PM
Subject: [FlyRotary] Re: = re-drive=20 question for George and Richard

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=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 = 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 lbs=20 (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 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. =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 the=20 13B 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=20 can be cut in half weighs 95 lbs.   So, the single rotor=20 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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