X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120] verified) by logan.com (CommuniGate Pro SMTP 5.2.15) with ESMTP id 3790936 for flyrotary@lancaironline.net; Fri, 31 Jul 2009 18:33:58 -0400 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=eanderson@carolina.rr.com Received: from computername ([75.191.186.236]) by cdptpa-omta02.mail.rr.com with ESMTP id <20090731223322484.UKCF557@cdptpa-omta02.mail.rr.com> for ; Fri, 31 Jul 2009 22:33:22 +0000 From: "Ed Anderson" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: EC2 and Ed's EFISM - a great combination Date: Fri, 31 Jul 2009 18:46:54 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0018_01CA120F.464707B0" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 In-Reply-To: Thread-Index: AcoSJNJP0hUXEPBqS4SmWIcx+6/kbwACcSJw X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Message-Id: <20090731223322484.UKCF557@cdptpa-omta02.mail.rr.com> This is a multi-part message in MIME format. ------=_NextPart_000_0018_01CA120F.464707B0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Actually, George, The RWS drive was not just a redevelopment of the Ross drive. 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. 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. 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. 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. 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. 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 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. 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). Steve, I went with the RD-1B PSRU from RWS. 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_0018_01CA120F.464707B0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

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

 

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.

 

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.

 

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.  

 

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.

 

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.

 

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

 

 

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.

 

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).

 

Steve,<= /o:p>

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

 <= /o:p>

T = Mann



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

The message was checked by ESET NOD32 Antivirus.

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