[f-AA] Prop Bolts

[Plain Carl]

Think the AN365's are approved by lots of IA's, but not being one myself and having opinions, I do not use them myself. Other than the safety issue, the main item with me is to get the proper torque values for the bolts.  This is critical on wood props.  Too much and you crush the prop out of service range and too little the prop may literally char against the back and crush plate.  Wood props should be retorqued seasonally regardless of time in service.  A little tlc with the torque wrench may save you a $1K prop replacement at annual.
   
  PC

John Baker <john at hangar9aeroworks.com> wrote:
        v\:* {behavior:url(#default#VML);}  o\:* {behavior:url(#default#VML);}  w\:* {behavior:url(#default#VML);}  .shape {behavior:url(#default#VML);}                DD,
   
  Typically, the installation with the tapered shaft flange will use standard AN6 bolts with a drilled shank. Length of the bolt will depend on the propeller used.  I believe my setup with a W72CK42 prop and Chief spinner used AN6-55 drilled bolts.  AN310-6 castle nuts, AN960-616 flat washers and AN380-3-3 cotter pins are standard.  I have heard, second hand, of the use of AN365 lock nuts being approved and/or used, but do not think their use is universally accepted. Carl White may have some additional input on this. With a Sensenich wood prop, you will need the Sensenich A-437 bushings and a crush plate.
   
  John Baker
  www.hangar9aeroworks.com
   
   
      
---------------------------------
  
  From: aeronca-bounces at westmont.edu [mailto:aeronca-bounces at westmont.edu] On Behalf Of EAA48 at aol.com
Sent: Sunday, December 03, 2006 11:14 PM
To: aeronca at westmont.edu
Subject: [f-AA] Prop Bolts

   
    Hey Clan:

What type of prop bolts are used on an A-65-8 with the tapered shaft prop flange?  Need the AN or NAS numbers and how you safety the prop.  The last IA allowed nyloc nuts to secure the propellor; however, my new IA and I an not certain if this is approved.  

     

    Any help would be greatly appreciated so I can get the Champ ready for the Sparta Illinois Winter Fly-In on Dec 16.  Last year there were 2 airplanes at the fly-in, a record.  Of course they were frozen in until Spring.

     

    Thanks for the help.

     

    dd


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