Return-Path: Received: from fed1rmmtao12.cox.net ([68.230.241.27] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 568746 for flyrotary@lancaironline.net; Wed, 15 Dec 2004 13:10:32 -0500 Received-SPF: none receiver=logan.com; client-ip=68.230.241.27; envelope-from=ALVentures@cox.net Received: from BigAl ([68.7.14.39]) by fed1rmmtao12.cox.net (InterMail vM.6.01.04.00 201-2131-117-20041022) with ESMTP id <20041215181001.HXVE21905.fed1rmmtao12.cox.net@BigAl> for ; Wed, 15 Dec 2004 13:10:01 -0500 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] M/T Prop Won't Fit PSRU Date: Wed, 15 Dec 2004 10:10:19 -0800 Message-ID: <000001c4e2d1$56596d40$6400a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C4E28E.48362D40" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_0001_01C4E28E.48362D40 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable If anyone else is running (or planning to run) a 3-blade M/T electric = prop with the RD-2C gearbox, I have discovered a mating problem in using this prop/gearbox combination for my 20B. The problem is the RD-2C prop = flange comes with 3/8 id x 5/8 od bushings. The M/T prop has a stepped hole = that is =BE=94 for the first 3/32=94 and then goes to 5/8=94. Tracy is not = comfortable with drilling out the 5/8=94 bushings and M/T adamantly advises against = using anything less than =BD=94 prop bolts with this prop. So, I=92m at a = standstill until I can get this resolved. The only solution I can see is to press = out the existing bushings and open up the holes to accept =BE=94 od x =BD=94 = id bushings. But that would require disassembly of the gearbox and some precision machine work, possible but not my first choice. =20 =20 Mark S. Lancair ES =96 20B =20 Mark; =20 Can you stand a prop extension? Get one the matches the RD-2C flange on = one end, and the MT on the other. I have a 6=94 saber extension with a 7=94 = prop flange having =BE=94 bushings and 7/16=94 bolts. =20 Al ------=_NextPart_000_0001_01C4E28E.48362D40 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

If anyone else is running = (or planning to run) a 3-blade M/T electric prop with the RD-2C gearbox, I = have discovered a mating problem in using this prop/gearbox combination for = my 20B. The problem is the RD-2C prop flange comes with 3/8 id x 5/8 = od bushings. The M/T prop has a stepped hole that is =BE” for = the first 3/32” and then goes to 5/8”. Tracy is not comfortable with drilling out the 5/8” bushings and M/T adamantly = advises against using anything less than =BD” prop bolts with this = prop. So, I’m at a standstill until I can get this resolved. The only solution I can see is to press out the existing bushings and open up the = holes to accept =BE” od x =BD” id bushings. But that would = require disassembly of the gearbox and some precision machine work, possible but = not my first choice.

Mark S.

Lancair ES – = 20B

Mark;

Can you stand a prop = extension?=A0 Get one the matches the RD-2C flange on one end, and the MT on the other. =A0I = have a 6” saber extension with a 7” prop flange having =BE” bushings = and 7/16” bolts.

Al

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