Return-Path: Received: from wb1-a.mail.utexas.edu ([128.83.126.134] verified) by logan.com (CommuniGate Pro SMTP 4.2.1) with ESMTP-TLS id 402450 for flyrotary@lancaironline.net; Wed, 08 Sep 2004 13:24:32 -0400 Received-SPF: none receiver=logan.com; client-ip=128.83.126.134; envelope-from=msteitle@mail.utexas.edu Received: (qmail 73979 invoked from network); 8 Sep 2004 17:24:04 -0000 Received: from dhcp-191-101.per.utexas.edu (HELO hrs-mark.mail.utexas.edu) (146.6.191.101) by wb1.mail.utexas.edu with SMTP; 8 Sep 2004 17:24:04 -0000 Message-Id: <5.1.1.5.2.20040908122231.01b8cc00@localhost> X-Sender: msteitle@mail.utexas.edu@localhost X-Mailer: QUALCOMM Windows Eudora Version 5.1.1 Date: Wed, 08 Sep 2004 12:23:57 -0500 To: "Rotary motors in aircraft" From: Mark Steitle Subject: Re: [FlyRotary] Fw: Metal Lock Nuts on Redrive?? In-Reply-To: Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="=====================_71741984==.ALT" --=====================_71741984==.ALT Content-Type: text/plain; charset="us-ascii"; format=flowed Well then, the nylon nuts stay. MS At 11:57 AM 9/8/2004 -0400, you wrote: >Below is Tracy's response to my question about using metal lock nuts on >the smaller bolts holding the redrive to the mounting plate. As Rusty >suggested, makes it difficult to accurately know much "Clamping" torque vs >"turning" torque you have applied. Tracy's specifically mentions prop >bolts (I think he may have meant the gearbox bolts), but it would follow >that he did mean prop bolts, then all the more reason not to use the metal >lock nuts on the smaller gearbox mounting bolts. > >So I will stick with Tracy's recommendation on the small gearbox bolts. > >No, power had not returned at the time he sent the e mail, he indicated he >thought it would be several days before they had power restored. He was >using his laptop (and conserving its battery). Otherwise, they made it >through the storm in good shape. > > >Ed > >Ed Anderson >RV-6A N494BW Rotary Powered >Matthews, NC >----- Original Message ----- >From: Tracy Crook >To: Ed Anderson >Sent: Thursday, September 09, 2004 11:20 AM >Subject: Re: Metal Lock Nuts on Redrive?? > >Ed, >Only thing I had against the metal locknuts was that they have such high >friction that they made it difficult to accurately torque the prop bolts. > >Tracy > >----- Original Message ----- >From: Ed Anderson >Sent: Tuesday, September 07, 2004 11:33 AM >To: Tracy Crook >Subject: Metal Lock Nuts on Redrive?? > >Tracy, > > As you are aware a common school of thought is not to use nylon > locknuts forward of the FW due to elevated temperatures. Certainly some > places exposed to high heat would indicate the use of metal locknuts, but > many other places will undoubtedly never see 250F (which appears to the > operational limit of the nylon/plastic locknuts). > >The question I have is do you see any reason not to use them instead of >the Nylon locknuts that hold the Redrive casting to the mounting plate. I >realize that you consider the nylon type more than adequate but was >curious as to whether you had a reason that you would recommend not using >the metal lock nuts. > >Thanks > >Ed > >Ed Anderson >RV-6A N494BW Rotary Powered >Matthews, NC --=====================_71741984==.ALT Content-Type: text/html; charset="us-ascii" Well then, the nylon nuts stay.

MS

At 11:57 AM 9/8/2004 -0400, you wrote:

Below is Tracy's response to my question about using metal lock nuts on the smaller bolts holding the redrive to the mounting plate. As Rusty suggested, makes it difficult to accurately know much "Clamping" torque vs "turning" torque you have applied. Tracy's specifically mentions prop bolts (I think he may have meant the gearbox bolts), but it would follow that he did mean prop bolts, then all the more reason not to use the metal lock nuts on the smaller gearbox mounting bolts.

So I will stick with Tracy's recommendation on the small gearbox bolts.

No, power had not returned at the time he sent the e mail, he indicated he thought it would be several days before they had power restored. He was using his laptop (and conserving its battery). Otherwise, they made it through the storm in good shape.

Ed

Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
From: Tracy Crook
To: Ed Anderson
Sent: Thursday, September 09, 2004 11:20 AM
Subject: Re: Metal Lock Nuts on Redrive??

Ed,
Only thing I had against the metal locknuts was that they have such high friction that they made it difficult to accurately torque the prop bolts.

Tracy

----- Original Message -----
From: Ed Anderson
Sent: Tuesday, September 07, 2004 11:33 AM
To: Tracy Crook
Subject: Metal Lock Nuts on Redrive??

Tracy,

As you are aware a common school of thought is not to use nylon locknuts forward of the FW due to elevated temperatures. Certainly some places exposed to high heat would indicate the use of metal locknuts, but many other places will undoubtedly never see 250F (which appears to the operational limit of the nylon/plastic locknuts).

The question I have is do you see any reason not to use them instead of the Nylon locknuts that hold the Redrive casting to the mounting plate. I realize that you consider the nylon type more than adequate but was curious as to whether you had a reason that you would recommend not using the metal lock nuts.

Thanks

Ed

Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC

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