Return-Path: Received: from server12.safepages.com ([216.127.146.26] verified) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP id 2583470 for flyrotary@lancaironline.net; Wed, 17 Sep 2003 19:20:21 -0400 Received: by server12.safepages.com (Postfix, from userid 1012) id CBF3111B3DA; Wed, 17 Sep 2003 23:17:35 +0000 (GMT) Received: from 2b0w201 (1Cust14.tnt24.atl4.da.uu.net [65.227.68.14]) by server12.safepages.com (Postfix) with ESMTP id EBDFD11B28D for ; Wed, 17 Sep 2003 23:17:31 +0000 (GMT) From: "Tommy James" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Re: RD-1C Good news, Bad news Date: Wed, 17 Sep 2003 19:20:17 -0400 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0080_01C37D50.BA42C6E0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6600 Importance: Normal In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0080_01C37D50.BA42C6E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit MessageWith what I know now, I would not fly with any other product than one from RWS. Tommy James<>< -----Original Message----- From: Tracy Crook [mailto:lors01@msn.com] Sent: Tuesday, September 16, 2003 4:43 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: RD-1C Good news, Bad news To those anxiously awaiting their RD-1C gear drives, here is the good news / bad news story. Just got the results on some troubling spline fit anomalies with the RD-1C propeller shaft. The problem was that a Genuine Ford planet carrier would fit nicely on the shaft but an aftermarket part simply would not slide onto the shaft. To the naked eye they looked the same and the major & minor diameters measured identical. At first I though the aftermarket part was just made wrong and I would simply have to use only Ford parts. On close inspection (backlit spline fit with a 10x eye loop), it looked like the spline teeth only had a point contact at the tips of the planet carrier spline teeth (this was on the Ford spline). This would result in very fast spline wear, increased lash and possible failure. The attached picture tells the story. After getting the data from Ford on the planet carrier spline it was clear that the pressure angle on the prop shaft spline did not match the carrier. Result: $7200.00 in scraped shafts. The only good news is that new shafts are in process. Still not sure who absorbs the cost but either way, someone gets the shaft. (please forgive tasteless pun) Actually, the supplier has agreed that if the problem turns out to be what I just described, they will accept responsibility. Isn't product development fun? I'll post an update to shipping schedule when we have it nailed down. Tracy Crook tcrook@rotaryaviation.com www.rotaryaviation.com ------=_NextPart_000_0080_01C37D50.BA42C6E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
With = what I know=20 now, I would not fly with any other product than one from=20 RWS.
Tommy = James<><
-----Original Message-----
From: Tracy Crook=20 [mailto:lors01@msn.com]
Sent: Tuesday, September 16, 2003 = 4:43=20 PM
To: Rotary motors in aircraft
Subject: = [FlyRotary] Re:=20 RD-1C Good news, Bad news

To those anxiously awaiting their = RD-1C gear=20 drives, here is the good news / bad news story.
 
Just got the results on some = troubling spline=20 fit anomalies with the RD-1C propeller shaft.  The = problem was=20 that a Genuine Ford planet carrier would fit nicely on the shaft but = an=20 aftermarket part simply would not slide onto the shaft.  To the = naked eye=20 they looked the same and the major & minor diameters measured=20 identical. 
 
At first I though the aftermarket = part was just=20 made wrong and I would simply have to use only Ford parts.  On = close=20 inspection (backlit spline fit with a 10x eye loop), it looked like = the spline=20 teeth only had a point contact at the tips of the planet carrier = spline teeth=20 (this was on the Ford spline).  This would result in very fast = spline=20 wear, increased lash and possible failure.  The attached picture = tells=20 the story.
 
After getting the data from Ford on = the planet=20 carrier spline it was clear that the pressure angle on the prop shaft = spline=20 did not match the carrier.  Result:  $7200.00 in scraped=20 shafts.  The only good news is that new shafts are in=20 process.   Still not sure who absorbs the cost but either = way,=20 someone gets the shaft. (please forgive tasteless pun)  Actually, = the=20 supplier has agreed that if the problem turns out to be what I just = described,=20 they will accept responsibility.
 
Isn't product development fun?  = I'll post an=20 update to shipping schedule when we have it nailed down.
 
Tracy Crook
tcrook@rotaryaviation.comwww.rotaryaviation.com<= /DIV>
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