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Prop hub

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jeynon2

Joined: 25 Oct 2007
Posts: 24
Location: Southern Illinois

Posted: Wed Jul 23, 2008 5:59 am Post subject: Prop hub

Can anyone tell me what is the proper torque to use for the bolts, and what type of thread compound should be used when installing the prop hub extension? I vaguely remember seeing this information somewhere, but can't seem to find it.



Thanks.



John Eynon

Lightning kit #53

walt.mefford(at)garmin.co
Guest

Posted: Wed Jul 23, 2008 6:11 am Post subject: Prop hub

This might help some.

http://www.sensenichprop.com/sen_html/comp-ac-cf-rev-1.pdf



Walt M.

N881WP

#55



--

ryan(at)greenlandings.com
Guest

Posted: Wed Jul 23, 2008 6:19 am Post subject: Prop hub

I believe nick will respond also but the torque should be 30 foot pounds. You should do this in steps to make sure the extension is seated evenly. The loctite that should be used is 206 but ,nick should verify this



Ryan Gross

Green Landings

---

pequeajim

Joined: 03 Sep 2006
Posts: 708
Location: New Holland, PA

Posted: Wed Jul 23, 2008 6:22 am Post subject: Prop hub

John:

  

 Check out section 9.1 of the jabiru engine manual.  It says in part A6 "A6 Mount Propeller Mount Flange to crankshaft Torque to 30ft.lbs/ Lockwire".

  

 Jim!



 

 On 7/23/08, Mefford, Walt <walt.mefford(at)garmin.com (walt.mefford(at)garmin.com)> wrote: [quote]--> Lightning-List message posted by: "Mefford, Walt" <walt.mefford(at)Garmin.com>



 This might help some.

http://www.sensenichprop.com/sen_html/comp-ac-cf-rev-1.pdf



Walt M.

N881WP

#55



--

pete(at)flylightning.net
Guest

Posted: Wed Jul 23, 2008 6:41 am Post subject: Prop hub

See attached instructions from Jabiru USA Sport Aircraft, LLC



Pete Krotje

--

info(at)flylightning.net
Guest

Posted: Wed Jul 23, 2008 6:42 am Post subject: Prop hub

Prop hub should be installed to 30 ft lbs and use locate 620 retaining

compound it is green ...do not use other permatexs or similar brands loctite

620 is required.



Nick Otterback

Arion Aircraft, LLC



--

pequeajim

Joined: 03 Sep 2006
Posts: 708
Location: New Holland, PA

Posted: Wed Jul 23, 2008 6:54 am Post subject: Prop hub

Thanks Pete!



 On 7/23/08, flylightning <info(at)flylightning.net (info(at)flylightning.net)> wrote: [quote]--> Lightning-List message posted by: "flylightning" <info(at)flylightning.net (info(at)flylightning.net)>

 

Prop hub should be installed to 30 ft lbs and use locate 620 retaining

compound it is green ...do not use other permatexs or similar brands loctite

620 is required.



Nick Otterback

Arion Aircraft, LLC

 

--

ryan(at)greenlandings.com
Guest

Posted: Wed Jul 23, 2008 7:09 am Post subject: Prop hub

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">   Thanks ,nick and pete for straightening out my numbers

Sent from my BlackBerry® smartphone with SprintSpeed

From:  "Jim Langley" <pequeajim(at)gmail.com>

Date: Wed, 23 Jul 2008 10:51:48 -0400

To: <lightning-list(at)matronics.com>

Subject: Re: Lightning-List: Prop hub

Thanks Pete!



On 7/23/08, flylightning <info(at)flylightning.net (info(at)flylightning.net)> wrote:[quote]--> Lightning-List message posted by: "flylightning" <info(at)flylightning.net (info(at)flylightning.net)>



Prop hub should be installed to 30 ft lbs and use locate 620 retaining

compound it is green ...do not use other permatexs or similar brands loctite

620 is required.



Nick Otterback

Arion Aircraft, LLC



--

jeynon2

Joined: 25 Oct 2007
Posts: 24
Location: Southern Illinois

Posted: Wed Jul 23, 2008 7:22 am Post subject: Re: Prop hub

Thanks to all for the lightning quick responses.  The attachment Pete sent is better than I was hoping for.



John Eynon

Lightning kit #53

pequeajim

Joined: 03 Sep 2006
Posts: 708
Location: New Holland, PA

Posted: Wed Jul 23, 2008 7:33 am Post subject: Prop hub

Ryan:

  

 You're getting pretty good typing on that Blackberry!



 

 On 7/23/08, ryan(at)greenlandings.com (ryan(at)greenlandings.com) <ryan(at)greenlandings.com (ryan(at)greenlandings.com)> wrote: [quote]Thanks ,nick and pete for straightening out my numbers  

[b]

ryan(at)greenlandings.com
Guest

Posted: Wed Jul 23, 2008 7:57 am Post subject: Prop hub

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">   Yeah, now we will see how well it works in the airplane on the way to oshkosh

Sent from my BlackBerry® smartphone with SprintSpeed

From:  "Jim Langley" <pequeajim(at)gmail.com>

Date: Wed, 23 Jul 2008 11:30:27 -0400

To: <lightning-list(at)matronics.com>

Subject: Re: Lightning-List: Prop hub

Ryan:

 

You're getting pretty good typing on that Blackberry!



 

On 7/23/08, ryan(at)greenlandings.com (ryan(at)greenlandings.com) <ryan(at)greenlandings.com (ryan(at)greenlandings.com)> wrote: 	  Quote: 	
		  Thanks ,nick and pete for straightening out my numbers 

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pennington(at)q.com
Guest

Posted: Wed Jul 23, 2008 10:43 am Post subject: Prop hub

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]-->  Hello Nick

 I know you have been busy, but I was wondering if you have have flown the  new wing tips enough to determine whether they are slower at fast cruise?

  

 Thanks for your time.

  

 Gary Pennington

  

  

 ---

pennington(at)q.com
Guest

Posted: Wed Jul 23, 2008 10:55 am Post subject: Prop hub

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]-->  Hello Pete

  

 I just printed the attachment you sent on the propeller flange. Very good  info. Would it be a good idea to replace the cap screws rather than reuse?

  

 Thanks

 Gary Pennington

 [quote]   ---

selwyn

Joined: 12 Mar 2008
Posts: 102
Location: Australia

Posted: Wed Jul 23, 2008 6:37 pm Post subject: Re: Prop hub

It is important to remember that Locktite 620 is serious stuff and if you apply it to all the cap screws  at the start of the process you need to move quickly or else you end up torqueing the last few studs up against the locktite rather than tightening the fitting down.  Not a good result!

pete(at)flylightning.net
Guest

Posted: Thu Jul 24, 2008 4:52 am Post subject: Prop hub

At 70 degrees F you have one hour before Loctite 620 begins to develop its

strength.   At 95 degrees F you have 15 minutes.



See technical data at http://207.250.200.229:8080/1/doc?id 6273 



Pete Krotje

Jabiru USA Sport Aircraft, LLC



--

Kayberg(at)aol.com
Guest

Posted: Thu Jul 24, 2008 5:49 am Post subject: Prop hub

In a message dated 7/23/2008 10:41:51 A.M. Eastern Daylight Time,  pete(at)flylightning.net writes:

  	  Quote: 	
		  See    attached instructions from Jabiru USA Sport Aircraft, LLC



Pete    Krotje

-----Original Message 	


 

 Pete, I dont mean to put too fine a point on it, but one part of the  procedure varies from what I have been taught as a plumber!

  

 Putting thread dope of any kind is supposed to go on the male threads not  the female.  I think the idea is to insure a complete coverage on the  threads, which you cannot do on the female part.

  

 So putting a few drops in the crankshaft bolt hole is a different  technique from what the Baltimore Gas and Electric company requires of gas  fitters!!  

  

 I think I am looking for assurance that the "few drops" technique has some  greater virtue.

  

 It just makes more sense to me to coat each bolt threads just before  installing rather than the "few drops".

  

 Is there something I dont know?

  

 Doug Koenigsberg

  

  

  

  



Get fantasy football with free live scoring. Sign up for FanHouse Fantasy Football today.

  [quote][b]

pete(at)flylightning.net
Guest

Posted: Thu Jul 24, 2008 7:03 am Post subject: Prop hub

Doug,  

   

I agree with you and we put the Loctite on the bolt.  However, in Australia where everything is upside down and backwards (and the toilets swirl the wrong way) it is the accepted procedure.  Probably if you went to work for Bundaberg Gas & Electric you would have to re learn your technique!  

   

Pete  

         

  

From: owner-lightning-list-server(at)matronics.com [mailto:owner-lightning-list-server(at)matronics.com] On Behalf Of Kayberg(at)aol.com

 Sent: Thursday, July 24, 2008 8:46 AM

 To: lightning-list(at)matronics.com

 Subject: Re: Prop hub  

  

       

In a message dated 7/23/2008 10:41:51 A.M. Eastern Daylight Time, pete(at)flylightning.net writes:  

   	  Quote: 	
		    

See attached instructions from Jabiru USA Sport Aircraft, LLC

 

 Pete Krotje

 

 

 -----Original Message  	
  

    

Pete, I dont mean to put too fine a point on it, but one part of the procedure varies from what I have been taught as a plumber!  

    

   

    

Putting thread dope of any kind is supposed to go on the male threads not the female.  I think the idea is to insure a complete coverage on the threads, which you cannot do on the female part.  

    

   

    

So putting a few drops in the crankshaft bolt hole is a different technique from what the Baltimore Gas and Electric company requires of gas fitters!!    

    

   

    

I think I am looking for assurance that the "few drops" technique has some greater virtue.  

    

   

    

It just makes more sense to me to coat each bolt threads just before installing rather than the "few drops".  

    

   

    

Is there something I dont know?  

    

   

    

Doug Koenigsberg  

    

   

    

   

    

   

    

   

  



 

         

  

Get fantasy football with free live scoring. Sign up for FanHouse Fantasy Football today.  

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Kayberg(at)aol.com
Guest

Posted: Thu Jul 24, 2008 2:29 pm Post subject: Prop hub

In a message dated 7/24/2008 11:04:43 A.M. Eastern Daylight Time,  pete(at)flylightning.net writes:

  	  Quote: 	
		     

Doug,   

    

I agree with you and    we put the Loctite on the bolt.  However, in Australia    where everything is upside down and backwards (and the toilets swirl the wrong     way) it is the accepted procedure.  Probably if you went to work for    Bundaberg Gas & Electric you would have to re learn your    technique!   

    

Pete   

 	


 

  

 I have heard that the toilets swirl the wrong way.

  

 However, as long as the brown trout swim downstream, all is well.

  

 I think we will also put Locktite on the bolt threads. Or recommend that  our builders do.

  

 Doug 



Get fantasy football with free live scoring. Sign up for FanHouse Fantasy Football today.

  [quote][b]

selwyn

Joined: 12 Mar 2008
Posts: 102
Location: Australia

Posted: Thu Jul 24, 2008 5:41 pm Post subject: Re: Prop hub

 	  pete(at)flylightning.net wrote: 	
		  At 70 degrees F you have one hour before Loctite 620 begins to develop its

strength.   At 95 degrees F you have 15 minutes.



See technical data at http://207.250.200.229:8080/1/doc?id 6273 



Pete Krotje

Jabiru USA Sport Aircraft, LLC



-- 	




This link did not work for me.  I found the TDS at http://tds.loctite.com/tds5/docs/620EN.pdf



It says basically the same thing.  However it also says that these times are drastically reduced by 7471 primer which I believe used to be mentioned in earlier versions of the Jabiru documentation.  The current one (earlier in this thread) just mentions generic Loctite thread cleaner so be careful what you use.



My limited experience of 620 on Jabiru prop flange and cylinder through bolts, with and without 7471, is that it does not give anything like an hour working time at 10 - 15 C.   Personally I aim to get things torqued up in five to ten minutes of applying 620.  You just need to do things smartly but carefully, without rushing as, above all, it needs to be done right.



Also remember that I am no more expert than anyone else and probably less than many here.  These are my observations but everyone needs to decide their own methods for themselves.



My baby arrives Monday.  Whoooo  Hoooo



Cheers,  Selwyn

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