Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Thu, 27 Mar 2003 18:50:59 -0500 Message-ID: X-Original-Return-Path: Received: from out011.verizon.net ([206.46.170.135] verified) by logan.com (CommuniGate Pro SMTP 4.1b1) with ESMTP id 2088395 for flyrotary@lancaironline.net; Thu, 27 Mar 2003 11:55:14 -0500 Received: from [65.239.57.105] ([65.239.43.9]) by out011.verizon.net (InterMail vM.5.01.05.27 201-253-122-126-127-20021220) with ESMTP id <20030327165510.VCCI6162.out011.verizon.net@[65.239.57.105]> for ; Thu, 27 Mar 2003 10:55:10 -0600 Mime-Version: 1.0 X-Sender: res0c5l1@mail.verizon.net X-Original-Message-Id: In-Reply-To: References: X-Original-Date: Thu, 27 Mar 2003 08:52:59 -0800 X-Original-To: "Rotary motors in aircraft" From: Ken Welter Subject: Re: [FlyRotary] Ross thrust bearing mod Content-Type: multipart/alternative; boundary="============_-1163338433==_ma============" --============_-1163338433==_ma============ Content-Type: text/plain; charset="us-ascii" ; format="flowed" You need to double or triple stack the thrust bearing to reduce the rpm as running at the limit and by stacking two bearings will cut the rpm in half. Without doing this the bearing will go out in short order. Ken Welter >Hi, fellow rotary enthusiasts. Attached are two photos of the >thrust bearing mod performed on my 2.17:1 Ross PSRU. The fix was >done by Dave Mix. He can be reached at >harborview@rivnet.net As you know, >each Ross unit is slightly different (machining tolerances, etc). >Dave will measure your unit and recommend the best fix considering >the shaft, end play, etc. Given the amount of shaft/play on my >unit, this was the best method of installing the thrust bearing. >Some units will have enough room for two thrust bearings. I was very >pleased with the quality of his work and the fast turn-around time. >When I find a good vendor, I like to pass it on. The cost for this >mod was $225.00 plus shipping. I consider this to be a small price >to pay for peace of mind and reliability. Hope this is of interest >to other Ross owners. Paul Conner, 13B powered SQ2000 under >construction. > >Attachment converted: Macintosh HD:IMAGE006.jpg 2 (JPEG/prvw) (0006405C) >Attachment converted: Macintosh HD:IMAGE007.jpg 1 (JPEG/prvw) (0006405D) >>> Homepage: http://www.flyrotary.com/ --============_-1163338433==_ma============ Content-Type: text/html; charset="us-ascii" Re: [FlyRotary] Ross thrust bearing mod
  You need to double or triple stack the thrust bearing to reduce the rpm as running at the limit and by stacking two bearings will cut the rpm in half.
 Without doing this the bearing will go out in short order.
 Ken Welter




Hi, fellow rotary enthusiasts.  Attached are two photos of the thrust bearing mod performed on my 2.17:1 Ross PSRU. The fix was done by Dave Mix.  He can be reached at harborview@rivnet.net   As you know, each Ross unit is slightly different (machining tolerances, etc). Dave will measure your unit and recommend the best fix considering the shaft, end play, etc.  Given the amount of shaft/play on my unit, this was the best method of installing the thrust bearing. Some units will have enough room for two thrust bearings. I was very pleased with the quality of his work and the fast turn-around time.  When I find a good vendor, I like to pass it on. The cost for this mod was $225.00 plus shipping.  I consider this to be a small price to pay for peace of mind and reliability.  Hope this is of interest to other Ross owners.  Paul Conner, 13B powered SQ2000 under construction.

Attachment converted: Macintosh HD:IMAGE006.jpg 2 (JPEG/prvw) (0006405C)
Attachment converted: Macintosh HD:IMAGE007.jpg 1 (JPEG/prvw) (0006405D)
>>  Homepage:  http://www.flyrotary.com/

--============_-1163338433==_ma============--