X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Mon, 23 Nov 2009 12:08:03 -0500 Message-ID: X-Original-Return-Path: Received: from smtp126.sbc.mail.sp1.yahoo.com ([69.147.65.185] verified) by logan.com (CommuniGate Pro SMTP 5.3c2) with SMTP id 3984284 for lml@lancaironline.net; Fri, 20 Nov 2009 21:21:12 -0500 Received-SPF: none receiver=logan.com; client-ip=69.147.65.185; envelope-from=buckyw@sbcglobal.net Received: (qmail 93432 invoked from network); 21 Nov 2009 02:20:38 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=sbcglobal.net; h=Received:X-Yahoo-SMTP:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE; b=lEVgFMJjD32odPRFEAmF063QlWWOu6nMsuuK8z2lwdKSz7Oze9Mqx9DusfentSxVnSTCTfQ/kVtT+aFPlYCnLDqkOJl6ZaAUu8gPAOQXAtTQxFp9cLU7kEllMyXUx3soyAuucRkxYeTgkSSjg0qrDwiAGVvVj4Px4CEaza6h6nA= ; Received: from 75-101-67-27.dsld.ltol.com (buckyw@75.101.67.27 with login) by smtp126.sbc.mail.sp1.yahoo.com with SMTP; 20 Nov 2009 18:20:38 -0800 PST X-Yahoo-SMTP: uvoLWi.swBDSuYf9uSKCRPCxaXLrNSbNhOdE3HTIIg4R X-YMail-OSG: WoCNdesVM1m8D8JmblIAbKmKCuxFAmP7dF7gLx9YNoa8KzdYqxBDYDKtVN0cQzuLpo.2VQTuhY9me6JW7tF47XcJhciiYC1pa9CpbcZz9fpgAX97BktuvrVDYv4Nw1Xpw1XW9OORfryxBkJJcFYjxAsTnLKnHRX8NIfQwGdXtPToeeXE_2Dt6xTepSRgj9kwczRwbjN4Tpkig6VYQSCfM_yXPEhuPB7F88Y02V2G_6V0bmHH7OPGoJ07JDzot2UzVpFhXr6w4x1dRTknQ0Wx0xD1o.xngWo- X-Yahoo-Newman-Property: ymail-3 X-Original-Message-ID: <123081449C744A6688FD42C5FCECAB98@NETBOOK> From: "LaVoy Whittier" X-Original-To: "Lancair Mailing List" References: Subject: Re: [LML] Re: Fw: Spinner Backing Plate X-Original-Date: Fri, 20 Nov 2009 18:21:03 -0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0009_01CA6A0E.37BBC760" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5843 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_0009_01CA6A0E.37BBC760 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Grayhawk, It is a CS prop and I do have a forward bulkhead installed. Others have = responded who have carbon backing plates. They all seem positive that = the carbon is the way to go. Lancair has a couple of weeks for backorders, so I am not the Lone = Ranger. Thanks for your input, Bucky ----- Original Message -----=20 From: Sky2high@aol.com=20 To: lml@nlpi079.prodigy.net=20 Sent: Friday, November 20, 2009 5:01 PM Subject: [LML] Re: Fw: Spinner Backing Plate Bucky, You failed to mention whether it is for a fixed pitch prop (bolted to = the crank flange or hub extension) or CS prop (bolted to the hub with = standoffs). In any event, a spinner without a forward bulkhead = (especially an unbalanced glass one) puts incredible work-hardening = stress on the back plate. Unfortunately, fixed pitch props have = nothing to support a forward bulkhead while the CD piston cup allows one = to construct such a support.=20 If you wish to create a carbon back plate, use the current one as a = male plug to create a female mold. Then it is just a matter of laying = in the carbon cloth and carefully vacuum bagging the setup. Remember to = make it strong enough to withstand the flexing. Another thing that can be done is to build a carbon flange inside the = aft part of the spinner to match the back plate and attach the spinner = with machine screws through the back of the back plate and thru the = flange to nut plates.=20 Have fun, Grayhawk =20 In a message dated 11/19/2009 3:03:21 P.M. Central Standard Time, = buckyw@sbcglobal.net writes: I have a prop. spinner backing plate with 500 + hrs. I found cracks = around the mounting holes ( at the prop hub ). I did not install the = doubler kit sold by Lancair. I know this is an ongoing problem for = many other builders as the plates crack with or without the kit and = sometimes with less hours. My question is this-- has anyone made one out of carbon fiber for = the 320/360 series with a constant speed prop? I know Brent Reagan made = one for his LNC4, but we all know Brent can make anything. I would appreciate any input positive or negative, about = fabricating one out of carbon fiber for the 320/360 series. Thanks, Bucky Whittier ------=_NextPart_000_0009_01CA6A0E.37BBC760 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Grayhawk,
It is a CS prop and I do have a forward bulkhead installed. Others = have=20 responded who have carbon backing plates. They all seem positive = that the=20 carbon is the way to go.
Lancair has a couple of weeks for backorders, so I am not the Lone=20 Ranger.
Thanks for your input,
Bucky
----- Original Message -----
From:=20 Sky2high@aol.com=20
Sent: Friday, November 20, 2009 = 5:01=20 PM
Subject: [LML] Re: Fw: Spinner = Backing=20 Plate

Bucky,
 
You failed to mention whether it is for a fixed pitch prop = (bolted to=20 the crank flange or hub extension) or CS prop (bolted to the hub = with=20 standoffs).  In any event, a spinner without a forward = bulkhead=20 (especially an unbalanced glass one) puts incredible work-hardening = stress on=20 the back plate.   Unfortunately, fixed pitch props have = nothing=20 to support a forward bulkhead while the CD piston cup allows one = to=20 construct such a support. 
 
If you wish to create a carbon back plate, use the current one as = a male=20 plug to create a female mold.  Then it is just a matter of laying = in the=20 carbon cloth and carefully vacuum bagging the setup.  = Remember to=20 make it strong enough to withstand the flexing.
 
Another thing that can be done is to build a carbon = flange inside=20 the aft part of the spinner to match the back plate and attach the = spinner=20 with machine screws through the back of the back plate and thru the = flange to=20 nut plates. 
 
Have fun,
 
Grayhawk  
 
In a message dated 11/19/2009 3:03:21 P.M. Central Standard Time, = buckyw@sbcglobal.net writes:
 

I have a prop. spinner backing = plate with 500 +=20 hrs. I found cracks around the mounting holes ( at the prop hub=20 ).   I did not install the doubler kit sold by=20 Lancair.   I know this is an ongoing problem for many = other=20 builders as the plates crack with or without the kit and = sometimes with=20 less hours.
My question is this-- has = anyone made one=20 out of carbon fiber for the 320/360 series with a constant = speed prop?=20 I know Brent Reagan made one for his LNC4, but we all know Brent can = make=20 anything.
I would appreciate=20 any input  positive or negative, about fabricating = one out of=20 carbon fiber for the 320/360 series.
Thanks,
Bucky=20 = Whittier
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