Return-Path: Received: from [65.54.241.200] (HELO hotmail.com) by logan.com (CommuniGate Pro SMTP 4.2.1) with ESMTP id 402379 for flyrotary@lancaironline.net; Wed, 08 Sep 2004 12:12:10 -0400 Received-SPF: none receiver=logan.com; client-ip=65.54.241.200; envelope-from=lors01@msn.com Received: from hotmail.com ([65.54.168.122]) by hotmail.com with Microsoft SMTPSVC(5.0.2195.6713); Wed, 8 Sep 2004 09:11:40 -0700 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 8 Sep 2004 09:11:40 -0700 Received: from 65.137.50.75 by bay3-dav18.bay3.hotmail.com with DAV; Wed, 08 Sep 2004 16:11:40 +0000 X-Originating-IP: [65.137.50.75] X-Originating-Email: [lors01@msn.com] X-Sender: lors01@msn.com From: "Tracy Crook" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Fw: Metal Lock Nuts on Redrive?? Date: Thu, 9 Sep 2004 12:12:41 -0400 MIME-Version: 1.0 X-Mailer: MSN Explorer 7.02.0011.2700 Content-Type: multipart/alternative; boundary="----=_NextPart_001_000B_01C49666.4E56ABB0" Message-ID: X-OriginalArrivalTime: 08 Sep 2004 16:11:40.0508 (UTC) FILETIME=[8670C9C0:01C495BE] Return-Path: lors01@msn.com ------=_NextPart_001_000B_01C49666.4E56ABB0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Yes, comment does apply to gear housing nuts as well. If it's running at= over 250 degrees you have far worse problems than the elastic stop nuts = loosing their grip. Tracy ----- Original Message ----- From: Ed Anderson Sent: Thursday, September 09, 2004 11:59 AM To: Rotary motors in aircraft Subject: [FlyRotary] Fw: Metal Lock Nuts on Redrive?? Below is Tracy's response to my question about using metal lock nuts on t= he smaller bolts holding the redrive to the mounting plate. As Rusty sug= gested, makes it difficult to accurately know much "Clamping" torque vs "= turning" torque you have applied. Tracy's specifically mentions prop bolt= s (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 lo= ck 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 h= e thought it would be several days before they had power restored. He wa= s 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 ----- =20 From: Tracy Crook =20 To: Ed Anderson =20 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 lockn= uts forward of the FW due to elevated temperatures. Certainly some place= s exposed to high heat would indicate the use of metal locknuts, but many= other places will undoubtedly never see 250F (which appears to the opera= tional limit of the nylon/plastic locknuts). The question I have is do you see any reason not to use them instead of t= he Nylon locknuts that hold the Redrive casting to the mounting plate. I= realize that you consider the nylon type more than adequate but was curi= ous 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 ------=_NextPart_001_000B_01C49666.4E56ABB0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Yes, comment does apply to gear housing n= uts as well.  If it's running at over 250 degrees you have far worse= problems than the elastic stop nuts loosing their grip.
 = ;
Tracy
 
----- Original= Message -----
From: Ed Anderson
Sent: Thursday, September 09, 2004 11:59 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Fw: Metal Lock Nuts on Red= rive??
 
Below is Tracy's response to my q= uestion about using metal lock nuts on the smaller bolts holding the redr= ive to the mounting plate.  As Rusty suggested, makes it difficult t= o accurately know much "Clamping" torque vs "turning" torque you have app= lied. 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, the= n all the more reason not to use the metal lock nuts on  the smaller= gearbox mounting bolts.
&nbs= p;
So I will stick with Tracy's recommendat= ion 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 day= s before they had power restored.  He was using his laptop (and cons= erving its battery).  Otherwise, they made it through the storm in g= ood shape.
 
=  
Ed
 
Ed Anderson
RV-6A N494BW Rotary PoweredMatthews, NC
----- Original Messa= ge -----
From:<= /B> Tracy Crook<= /A>
Sent:= Thursday, September 09, 2004 11:20 AM
Subject: Re: Met= al 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<= /DIV>
To: Tracy Crook
Subject: Metal Lock Nuts on Redrive??
 
Tracy,
 
    As you are aware a common school of tho= ught is not to use nylon locknuts forward of the FW due to elevated tempe= ratures.  Certainly some places exposed to high heat would indicate = the use of metal locknuts, but many other places will undoubtedly never s= ee 250F (which appears to the operational limit of the nylon/plastic lock= nuts).
 
=
The question I have is do you see any re= ason not to use them instead of the Nylon locknuts that hold the Redrive = casting to the mounting plate.  I realize that you consider the nylo= n 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
&nbs= p;
Ed
 
Ed= Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
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