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Safety wire on Hartzell

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khorton01(at)rogers.com
Guest

Posted: Mon Jul 02, 2007 9:48 am Post subject: Safety wire on Hartzell

I started to put safety wire on the bolts attaching my Hartzell HC2YK  

prop to the crank, and I've got a question.  If I safety pairs of  

bolts, with the wire oriented to tighten both bolts, the safety wire  

will run over the edge of the hub where it protrudes between the prop  

bolts.  That doesn't seem like a good situation, as the steel safety  

wire could wear on the aluminum hub.  What to do?  Put some sort of  

protection over the twisted safety wire before I slip it into the  

second bolt?  If so, what should I use?  Or, am I worrying about  

something that is not a problem?



Kevin Horton         RV-8 (finishing kit)

Ottawa, Canada

http://www.kilohotel.com/rv8

kahuna

Joined: 02 Feb 2007
Posts: 93

Posted: Mon Jul 02, 2007 10:26 am Post subject: Safety wire on Hartzell

"Or, am I worrying about  

 something that is not a problem?"

 

 Yes. Its that. Since the wire never moves, it cant wear and get into the hub.

 The practice of safety wiring as you described has been done for eons.

 Best,

 Mike

 

 

 [img]cid:1__=08BBF99FDFF683258f9e8a93df938(at)us.ibm.com[/img]Kevin Horton <khorton01(at)rogers.com>

 

 

       Kevin Horton <khorton01(at)rogers.com> 

 Sent by: owner-rv-list-server(at)matronics.com 

07/02/2007 01:46 PM  Please respond to

 rv-list(at)matronics.com

  
 
 
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 To

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 rv-list(at)matronics.com  [img]cid:3__=08BBF99FDFF683258f9e8a93df938(at)us.ibm.com[/img]

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[img]cid:3__=08BBF99FDFF683258f9e8a93df938(at)us.ibm.com[/img]

   [img]cid:3__=08BBF99FDFF683258f9e8a93df938(at)us.ibm.com[/img]

 Subject

[img]cid:3__=08BBF99FDFF683258f9e8a93df938(at)us.ibm.com[/img]

 Safety wire on Hartzell    [img]cid:3__=08BBF99FDFF683258f9e8a93df938(at)us.ibm.com[/img][img]cid:3__=08BBF99FDFF683258f9e8a93df938(at)us.ibm.com[/img]    

 --> RV-List message posted by: Kevin Horton <khorton01(at)rogers.com>

 

 I started to put safety wire on the bolts attaching my Hartzell HC2YK  

 prop to the crank, and I've got a question.  If I safety pairs of  

 bolts, with the wire oriented to tighten both bolts, the safety wire  

 will run over the edge of the hub where it protrudes between the prop  

 bolts.  That doesn't seem like a good situation, as the steel safety  

 wire could wear on the aluminum hub.  What to do?  Put some sort of  

 protection over the twisted safety wire before I slip it into the  

 second bolt?  If so, what should I use?  Or, am I worrying about  

 something that is not a problem?

 

 Kevin Horton         RV-8 (finishing kit)

 Ottawa, Canada

 http://www.kilohotel.com/rv8

 

 

 =====================================

  tor?RV-List">http://www.matronics.com/Navigator?RV-List

 =====================================

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 tp://forums.matronics.com

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wgill10(at)comcast.net
Guest

Posted: Mon Jul 02, 2007 10:26 am Post subject: Safety wire on Hartzell

Kevin,



That's the way it's done and I have never observed any wear from such.

Its tricky safety wiring these bolts...I had to loosen a couple to get

the safety wire routed through the bolt hole and then re-torque followed

by safety wiring the bolt(s).



Bill

--

rhdudley1(at)bellsouth.ne
Guest

Posted: Mon Jul 02, 2007 10:31 am Post subject: Safety wire on Hartzell

Hi Kevin,

Attached is a figure copied out of AC 43.13-1B. The pair in the lower 

left looks like your description of the propeller bolts. Doe that  help 

any?

Regards,

Richard Dudley



Kevin Horton wrote:



 	  Quote: 	
		   



 I started to put safety wire on the bolts attaching my Hartzell HC2YK  

 prop to the crank, and I've got a question.  If I safety pairs of  

 bolts, with the wire oriented to tighten both bolts, the safety wire  

 will run over the edge of the hub where it protrudes between the prop  

 bolts.  That doesn't seem like a good situation, as the steel safety  

 wire could wear on the aluminum hub.  What to do?  Put some sort of  

 protection over the twisted safety wire before I slip it into the  

 second bolt?  If so, what should I use?  Or, am I worrying about  

 something that is not a problem?



 Kevin Horton         RV-8 (finishing kit)

 Ottawa, Canada

 http://www.kilohotel.com/rv8

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dcw(at)mnwing.org
Guest

Posted: Mon Jul 02, 2007 10:33 am Post subject: Safety wire on Hartzell

HI Kevin:



Maybe some will differ, but I have never seen this as a problem.  I pulled 

the prop of my first RV-4 after 600 hours of use and there was so wear at 

all.  Safetying the c/s prop is a time consuming affair since it is rather 

close quarters, but patience will prevail.



Doug Weiler

RV-4, N722DW, 400 hours





---

n616tb(at)btsapps.com
Guest

Posted: Mon Jul 02, 2007 10:39 am Post subject: Safety wire on Hartzell

Interestingly my DAR told me those holes were not for safety wire and it was

not needed.  I did not do it at his urging but always feel it should be

done.  It was never a problem on my previous airplane with the same prop to

just do it the way you described and no protection on the wire is needed.



Tim



[quote] --

mrobert569(at)hotmail.com
Guest

Posted: Mon Jul 02, 2007 10:40 am Post subject: Safety wire on Hartzell

Kevin,

  

 I use a small piece of vinayl (sp?) tubing over the wire to protect the hub from being scratched. 



 Mike Robertson



   

 > To: rv-list(at)matronics.com

 	  Quote: 	
		   From: khorton01(at)rogers.com

 Subject: Safety wire on Hartzell

 Date: Mon, 2 Jul 2007 13:46:19 -0400

 

 --> RV-List message posted by: Kevin Horton <khorton01(at)rogers.com>

 

 I started to put safety wire on the bolts attaching my Hartzell HC2YK 

 prop to the crank, and I've got a question. If I safety pairs of 

 bolts, with the wire oriented to tighten both bolts, the safety wire 

 will run over the edge of the hub where it protrudes between the prop 

 bolts. That doesn't seem like a good situation, as the steel safety 

 wire could wear on the aluminum hub. What to do? Put some sort of 

 protection over the twisted safety wire before I slip it into the 

 second bolt? If so, what should I use? Or, am I worrying about 

 something that is not a problem?

 

 Kevin Horton RV-8 (finishing kit)

 Ottawa, Canada

 http://www.kilohotel.com/rv8

 

 

 =============

 

 

 


	


Hotmail to go? Get your Hotmail, news, sports and much more!   Check out the New MSN Mobile  [quote][b]

khorton01(at)rogers.com
Guest

Posted: Mon Jul 02, 2007 12:11 pm Post subject: Safety wire on Hartzell

Thanks to everyone for the advice.  I'll press on.



Tim - DARs are not always right.  My Hartzell manual specifically  

says to safety wire the prop bolts, and there is a figure with an  

arrow pointing at the holes in those roll pins at the place to put  

safety wire.



Kevin



On 2 Jul 2007, at 14:35, Tim Bryan wrote:



[quote] 



 Interestingly my DAR told me those holes were not for safety wire  

 and it was

 not needed.  I did not do it at his urging but always feel it  

 should be

 done.  It was never a problem on my previous airplane with the same  

 prop to

 just do it the way you described and no protection on the wire is  

 needed.



 Tim



> --

n616tb(at)btsapps.com
Guest

Posted: Mon Jul 02, 2007 12:18 pm Post subject: Safety wire on Hartzell

I hadn't see that, but Agree completely

Tim

Do Not Archive



[quote] --

Dale Ensing

Joined: 11 Jan 2006
Posts: 571
Location: Aero Plantation Weddington NC

Posted: Mon Jul 02, 2007 1:09 pm Post subject: Safety wire on Hartzell

And done with .040 SS safety wire.



.  My Hartzell manual specifically  

 	  Quote: 	
		   says to safety wire the prop bolts, and there is a figure with an  

 arrow pointing at the holes in those roll pins at the place to put  

 safety wire.

 

 Kevin

 

>

_________________
Dale Ensing
RV-6A
Aero Plantation
Weddington NC

khorton01(at)rogers.com
Guest

Posted: Tue Jul 03, 2007 2:28 am Post subject: Safety wire on Hartzell

Actually, the consumables section in the chapter on installing and  

removing the prop in the Hartzell manual specifies 0.032 SS safety  

wire.  This is consistent with the guidance in AC43.13-1B.



Kevin Horton



On 2 Jul 2007, at 17:06, Dale Ensing wrote:



 	  Quote: 	
		   



 And done with .040 SS safety wire.



 .  My Hartzell manual specifically

> says to safety wire the prop bolts, and there is a figure with an   

> arrow pointing at the holes in those roll pins at the place to  

> put  safety wire.

> Kevin

>>

Dale Ensing

Joined: 11 Jan 2006
Posts: 571
Location: Aero Plantation Weddington NC

Posted: Tue Jul 03, 2007 3:03 am Post subject: Safety wire on Hartzell

That is interesting Kevin. The manual that came with my Hartzell says 0.040 

SS safety wire. The .040 is a real pain to work with...especially on the 

prop bolts.

Dale Ensing



---

_________________
Dale Ensing
RV-6A
Aero Plantation
Weddington NC

Jerry Cochran

Joined: 10 Jan 2006
Posts: 111
Location: Wilsonville, OR

Posted: Tue Jul 03, 2007 7:27 am Post subject: Safety wire on Hartzell

Sez right in the Hartzell manual to safety with .032 wire. I personally  observed a certain FAA person fail a prop that only used .025 wire during an  airworthiness inspection.

  

 Do not archive.

  

 Jerry Cochran

  	  Quote: 	
		  From:    "Tim Bryan" <n616tb(at)btsapps.com>

Subject: RE: Safety wire on    Hartzell

Interestingly my DAR told me those holes were not for    safety wire and it was

not needed.  I did not do it at his urging but    always feel it should be

done.  It was never a problem on my previous    airplane with the same prop to

just do it the way you described and no    protection on the wire is needed.



Tim 	


 

  



See what's free at AOL.com. 

  [quote][b]

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