installing prop

[JDanno]

Is it customary to use any thread lock or maybe even anti-seize on the prop flange mounting bolts? My first install so I have no experience with it. Thanks.

[Pat Stewart]

No thread lock required. Just make sure you torque correctly and safety wire each bolt.

Pat

[Mike S]

I just did this last week, be advised it may be helpful to pre thread the safety wire into the nut, before you get to final torque------I even had to back off a couple of nuts, insert the wire, and re torque them, just no other way to get the wire in place.

By the way, I borrowed a Snap On torque wrench from a buddy, has interchangable heads, worked perfectly for the prop nuts.





Glad I could borrow these, pretty pricey ------- but SWEET

Good luck.

[9GT]

Originally Posted by Mike S

I just did this last week, be advised it may be helpful to pre thread the safety wire into the nut, before you get to final torque------I even had to back off a couple of nuts, insert the wire, and re torque them, just no other way to get the wire in place.

Good luck.

That's a great tip I wish I knew two years ago! Thanks.

[flyboy1963]

okay, that's a nice snap-On alright...I've never seen one.
So I'd guess the other 99% of the population uses a socket and standard torque wrench, so pre-threading the wire isn't an option, right?
Since the bolts are safety'd in pairs, I'm not sure I see why they become hard to wire?....but I've not had to replace the prop yet, but I will this year when I install a crank trigger for EI.
You mechanic types can give some pointers here for all us newbies!

thx

[kevinh]

Originally Posted by flyboy1963

So I'd guess the other 99% of the population uses a socket and standard torque wrench, so pre-threading the wire isn't an option, right?
Since the bolts are safety'd in pairs, I'm not sure I see why they become hard to wire?....
thx

This is mostly a CS prop thing. For a non CS prop you can use regular sockets and get the wire on easily. The Hartzell hub makes it hard to get the wire in from some positions (you also have to use an adapter or mod a crescent wrench)

[Walt]

Per Hartzell:

Torque the 1/2 inch propeller mounting nuts (dry) in
accordance with Table 3-1, Figure 3-1 and Figure 3-2.
Safety wire the studs in pairs (if required by the aircraft
maintenance manual) at the rear of the propeller mounting
flange.

Being that the RV doesn't have a MM, safety wiring is optional.

[Mike S]

My M.P. propeller manual says to safety wire in pairs.

Also says to use .032"-----

I ended up using .040" because I could make it fit, and that is what I understand is the norm for props.

And, yes, as mentioned above, this is a C/S issue about the clearance for installing the safety wire.

[yakdriver]

Since the bolts are safety'd in pairs, I'm not sure I see why they become hard to wire?....but I've not had to replace the prop yet, but I will this year when I install a crank trigger for EI.
You mechanic types can give some pointers here for all us newbies!

thx[/quote]

You have no idea what a pia this is. Let us know how many punctures you have in your fingers when you do yours. Don

[elippse]

I use four Belleville washers on each prop bolt, two one way and two the other, to secure my FP prop so no safety wire is required. What's best about this is that these washers will take up any swelling-shrinking of a wood-core prop so there is no need to keep checking torque regularly. Even safety wire won't help if your wood-core FP prop shrinks and loses its clamping force. The back of the blade will char, slop around, and break off the bolts. They would probably work well on a CS prop also as they will maintain the bolt torque. Vance Jaqua did a nice write-up on them that is floating around.