X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from poplet2.per.eftel.com ([203.24.100.45] verified) by logan.com (CommuniGate Pro SMTP 5.2.15) with ESMTP id 3791182 for flyrotary@lancaironline.net; Sat, 01 Aug 2009 03:01:50 -0400 Received-SPF: none receiver=logan.com; client-ip=203.24.100.45; envelope-from=lendich@aanet.com.au Received: from sv1-1.aanet.com.au (sv1-1.per.aanet.com.au [203.24.100.68]) by poplet2.per.eftel.com (Postfix) with ESMTP id 56245173919 for ; Sat, 1 Aug 2009 15:00:58 +0800 (WST) Received: from ownerf1fc517b8 (203.171.92.134.static.rev.aanet.com.au [203.171.92.134]) by sv1-1.aanet.com.au (Postfix) with SMTP id 56713BEC05F for ; Sat, 1 Aug 2009 15:00:55 +0800 (WST) Message-ID: From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: EC2 and Ed's EFISM - a great combination Date: Sat, 1 Aug 2009 17:00:57 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0007_01CA12C9.A34CDB50" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Antivirus: avast! (VPS 090731-0, 07/31/2009), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0007_01CA12C9.A34CDB50 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ed,=20 I stand corrected. I merely wanted to point out (to the initiated) the fact that RWS was an = advancement in and improvement on the Ross. All your points are well made. George ( down under) Actually, George, The RWS drive was not just a redevelopment of the = Ross drive. =20 =20 Tracy basically started from scratch and engineered a redrive that was = designed to meet certain objectives while achieving a reasonable cost. = There is no other redrive I am familiar with that has anywhere near the = number of flying hours that the RWS redrive has with none of the = problems associated with the Ross. =20 While there is a superficial similarly to the Ross (Prop on one end = and rotary on the other, planetary gears in the middle {:>)) in = appearance, the internals are considerably ahead of anything Ross had. = Pressure lubrication of the prop shaft for one thing, an integral thrust = bearing for another, a removable propeller shaft for yet another, full = oil pressure lubrication. The Ross drive required a restrictor in the = oil line to (can you believe this) reduce oil pressure - otherwise the = thing leaked like crazy - even with the restrictor, the rear seal = frequently was a leaky mess. But, reducing the oil pressure was one = reason the Ross had marginal lubrication in my opinion. Even then, the = oil distribution inside the Ross was also not well designed.=20 =20 Don't get me wrong, I was glad to get a Ross - because it was the only = thing around at the time. Had old man, Lou Ross, lived longer he may = have eventually fixed a lot of these issues, but unfortunately he did = not and I won't go into the situation with his son, Chris. But, we are = fortunate that Tracy took on this challenge and did it right. =20 =20 One thing I really appreciate about the RWS design is that it has a = considerably different internal set up with easily replaceable parts - = which was not the case with the Ross. If you wanted to completely = disassembly a Ross unit you most likely had to take it to a machine = shop. =20 Just wanted to make it clear that in my opinion the RWS should not be = associated with the Ross unit which many have found shortcomings in. =20 Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://www.dmack.net/mazda/index.html http://www.flyrotary.com/ http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.rotaryaviation.com/Rotorhead%20Truth.htm -------------------------------------------------------------------------= ----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of George Lendich Sent: Friday, July 31, 2009 5:20 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: EC2 and Ed's EFISM - a great combination =20 =20 Steve, The Ross drive was redeveloped by Tracy Crook of Real World = Solutions (RWS). Tracy now uses the 6 planet planetary (Ford Unit) and = is about the best you will get weight wise and value for money. =20 There are other similar units - all have slightly different = construction, however Tracy's is well proven. I will probably make my = own, but only because of the tyranny of distance and associated costs. George (down under). =20 Steve, I went with the RD-1B PSRU from RWS. =20 T Mann __________ Information from ESET NOD32 Antivirus, version of virus = signature database 3267 (20080714) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com ------=_NextPart_000_0007_01CA12C9.A34CDB50 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Ed,
I stand corrected.
I merely wanted to point out (to the = initiated) the=20 fact that RWS was an advancement in and improvement on the = Ross.
All your points are well = made.
George ( down under)

Actually, = George, The=20 RWS drive was not just a redevelopment of the Ross drive.=20  

 

Tracy basically = started=20 from scratch and engineered a redrive that was designed to meet = certain=20 objectives while achieving a reasonable cost.   There is no = other=20 redrive I am familiar with that has anywhere near the number of flying = hours=20 that the RWS redrive has with none of the problems associated with the = Ross.

 

While there = is a=20 superficial similarly to the Ross (Prop on one end and rotary on the = other,=20 planetary gears in the middle {:>)) in appearance, the internals = are=20 considerably ahead of anything Ross had.  Pressure lubrication of = the=20 prop shaft for one thing, an integral thrust bearing for another, a = removable=20 propeller shaft for yet another, full oil pressure lubrication.  = The Ross=20 drive required a restrictor in the oil line to (can you believe this) = reduce=20 oil pressure =96 otherwise the thing leaked like crazy =96 even with = the=20 restrictor, the rear seal frequently was a leaky mess.  But, = reducing the=20 oil pressure was one reason the Ross had marginal lubrication in my = opinion.=20 Even then, the oil distribution inside the Ross was also not well = designed.=20

 

Don=92t get = me wrong, I=20 was glad to get a Ross =96 because it was the only thing around at the = time.  Had old man, Lou Ross, lived longer he may have eventually = fixed a=20 lot of these issues, but unfortunately he did not and I won=92t go = into the=20 situation with his son, Chris.  But, we are fortunate that = Tracy took = on this=20 challenge and did it right.  

 

One thing I = really=20 appreciate about the RWS design is that it has a considerably = different=20 internal set up with easily replaceable parts =96 which was not the = case with=20 the Ross.  If you wanted to completely disassembly a Ross unit = you most=20 likely had to take it to a machine shop.

 

Just wanted = to make=20 it clear that in my opinion the RWS should not be associated with the = Ross=20 unit which many have found shortcomings = in.

 

Ed=20 Anderson

Rv-6A = N494BW Rotary=20 Powered

Matthews,=20 NC

eanderson@carolina.rr.com

http://www.andersonee.com

http://www.dmack.net/mazda/index.html

http://www.flyrotary.com/

http://members.cox.net/rogersda/rotary/configs.htm#N494BW

http://www.r= otaryaviation.com/Rotorhead%20Truth.htm

From:=20 Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net] On=20 Behalf Of George Lendich
Sent: Friday, July 31, 2009 = 5:20=20 PM
To: = Rotary motors in aircraft
Subject: [FlyRotary] Re: EC2 = and Ed's=20 EFISM - a great combination

 

 

Steve,

The Ross drive was = redeveloped=20 by Tracy Crook of Real World Solutions (RWS). Tracy now uses the 6 planet = planetary (Ford=20 Unit) and is about the best you will get  weight wise and value = for=20 money.

 

There are other = similar units=20 - all have slightly different construction, however Tracy's is = well=20 proven. I will probably make my own, but only because of the tyranny = of=20 distance and associated costs.

George (down=20 under).

 

Steve,

I = went with=20 the RD-1B PSRU from RWS.

 

T=20 Mann



__________ Information from ESET = NOD32=20 Antivirus, version of virus signature database 3267 (20080714)=20 __________

The message was checked by ESET NOD32 = Antivirus.

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