Return-Path: Received: from [65.54.168.122] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 568804 for flyrotary@lancaironline.net; Wed, 15 Dec 2004 13:42:32 -0500 Received-SPF: pass receiver=logan.com; client-ip=65.54.168.122; envelope-from=lors01@msn.com Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 15 Dec 2004 10:42:02 -0800 Message-ID: Received: from 65.54.98.102 by BAY3-DAV18.phx.gbl with DAV; Wed, 15 Dec 2004 18:41:36 +0000 X-Originating-IP: [65.54.98.102] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: M/T Prop Won't Fit PSRU Date: Wed, 15 Dec 2004 13:41:38 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_022F_01C4E2AB.CD1A62C0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0009.2900 Seal-Send-Time: Wed, 15 Dec 2004 13:41:38 -0500 X-OriginalArrivalTime: 15 Dec 2004 18:42:02.0085 (UTC) FILETIME=[C433B150:01C4E2D5] This is a multi-part message in MIME format. ------=_NextPart_000_022F_01C4E2AB.CD1A62C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I see no reason why this will not work. I'd fly it any day. I fact I'm = going to fly my 20B RV-8 with 3/8" prop bolts and 5/8" drive lugs but = this will be on a wood or composite FP prop. I would NOT do this on a = 300 HP Lyc engine. Too much torsional vibration. Tracy ----- Original Message -----=20 From: Mark R Steitle=20 To: Rotary motors in aircraft=20 Sent: Wednesday, December 15, 2004 1:35 PM Subject: [FlyRotary] Re: M/T Prop Won't Fit PSRU Tracy, I had considered doing that earlier and discarded it as too simple a = solution. And since I'm not an engineer, didn't think it would be safe = to fly like that. Seriously, if that is strong enough to do the job, I = may give it a try. The M/T prop has a =BE x 3/32 counterbore on five of = the six holes. So, I can do this on five of the bolts. Sounds good. =20 =20 Mark S. =20 -------------------------------------------------------------------------= ----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of Tracy Crook Sent: Wednesday, December 15, 2004 12:26 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: M/T Prop Won't Fit PSRU =20 Just had another idea on this. =20 Drill the RD-1C drive lugs to 1/2" for the sacred MT 1/2" bolts. Make = a simple 3/4" OD / 5/8" ID bushing 3/32" thick and put it on one of the = drive lugs. =20 =20 No drilling the prop hub required. =20 Tracy=20 ----- Original Message -----=20 From: Mark R Steitle=20 To: Rotary motors in aircraft=20 Sent: Wednesday, December 15, 2004 12:37 PM Subject: [FlyRotary] M/T Prop Won't Fit PSRU=20 =20 I have been working to resolve a problem for more than a month now = and thought I would query the group for a possible solution. =20 =20 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. =20 =20 Mark S. Lancair ES - 20B (with a very pricey lawn ornament) =20 ------=_NextPart_000_022F_01C4E2AB.CD1A62C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
I see no reason why this will not work.  I'd fly it any=20 day.  I fact I'm going to fly my 20B RV-8 with 3/8" prop bolts and = 5/8"=20 drive lugs but this will be on a wood or composite FP prop.  I = would=20 NOT do this on a 300 HP Lyc engine.  Too much torsional = vibration.
 
Tracy
----- Original Message -----
From: Mark R Steitle =
To: Rotary motors in = aircraft
Sent: Wednesday, December 15, = 2004 1:35=20 PM
Subject: [FlyRotary] Re: M/T = Prop Won't=20 Fit PSRU

Tracy,

I had = considered=20 doing that earlier and discarded it as too simple a solution.  = And since=20 I=92m not an engineer, didn=92t think it would be safe to fly like = that. =20 Seriously, if that is strong enough to do the job, I may give it a = try. =20 The M/T prop has a =BE x 3/32 counterbore on five of the six = holes.  So, I=20 can do this on five of the bolts.  Sounds good. =20

 

Mark=20 S.

 

From:=20 Rotary motors in aircraft = [mailto:flyrotary@lancaironline.net] On=20 Behalf Of Tracy Crook
Sent: Wednesday, December 15, = 2004 12:26=20 PM
To: = Rotary motors in aircraft
Subject: [FlyRotary] Re: M/T = Prop Won't=20 Fit PSRU

 

Just had = another=20 idea on this.

 

Drill = the RD-1C=20 drive lugs to 1/2" for the sacred MT 1/2" bolts.  Make a simple = 3/4"=20 OD / 5/8" ID bushing 3/32" thick and put it on one of the drive=20 lugs.  

 

No = drilling the=20 prop hub required.

 

Tracy 

----- = Original=20 Message -----

From: Mark R Steitle=20

To: Rotary motors in = aircraft=20

Sent: = Wednesday,=20 December 15, 2004 12:37 PM

Subject: = [FlyRotary] M/T=20 Prop Won't Fit PSRU

 

I have = been=20 working to resolve a problem for more than a month now and thought I = would=20 query the group for a possible solution. =20

 

If = anyone else is=20 running (or planning to run) a 3-blade M/T electric prop with the = RD-2C=20 gearbox, I have discovered a mating problem in using this = prop/gearbox=20 combination for my 20B.  The problem is the RD-2C prop flange = comes=20 with 3/8 id x 5/8 od bushings.  The M/T prop has a stepped hole = that is=20 =BE=94 for the first 3/32=94 and then goes to 5/8=94. =  Tracy is = not=20 comfortable with drilling out the 5/8=94 bushings and M/T adamantly = advises=20 against using anything less than =BD=94 prop bolts with this = prop.  So, I=92m=20 at a standstill until I can get this resolved.  The only = solution I can=20 see is to press out the existing bushings and open up the holes to = accept =BE=94=20 od x =BD=94 id bushings.  But that would require disassembly of = the gearbox=20 and some precision machine work, possible but not my first = choice. =20

 

Mark=20 S.

Lancair = ES =96=20 20B

(with a = very=20 pricey lawn ornament) =20    

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