Return-Path: Received: from [129.116.87.171] (HELO MAIL01.austin.utexas.edu) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 568799 for flyrotary@lancaironline.net; Wed, 15 Dec 2004 13:35:35 -0500 Received-SPF: none receiver=logan.com; client-ip=129.116.87.171; envelope-from=mark.steitle@austin.utexas.edu X-MimeOLE: Produced By Microsoft Exchange V6.5.7226.0 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C4E2D4.CB6D5B2E" Subject: RE: [FlyRotary] Re: M/T Prop Won't Fit PSRU Date: Wed, 15 Dec 2004 12:35:04 -0600 Message-ID: <87DBA06C9A5CB84B80439BA09D86E69E6CBE2A@MAIL01.austin.utexas.edu> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [FlyRotary] Re: M/T Prop Won't Fit PSRU Thread-Index: AcTi076u+GcGN2voSRe1LohSIfBloAAACmzg From: "Mark R Steitle" To: "Rotary motors in aircraft" This is a multi-part message in MIME format. ------_=_NextPart_001_01C4E2D4.CB6D5B2E Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 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_001_01C4E2D4.CB6D5B2E Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Tracy,

I had considered doing that earlier = and discarded it as too simple a solution.=A0 And since I’m not an = engineer, didn’t think it would be safe to fly like that.=A0 Seriously, if = that is strong enough to do the job, I may give it a try.=A0 The M/T prop has a = =BE x 3/32 counterbore on five of the six holes.=A0 So, I can do this on five of = the bolts.=A0 Sounds good.=A0

 

Mark = S.

 

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

 

Just had = another idea on this.

 

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.  

 

No drilling = the prop hub required.

 

Tracy 

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

From: Mark R Steitle =

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

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

 

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. 

 

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

(with a very pricey lawn = ornament)     

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