What size safety wire?
 

I know .040" safety wire is recommended/required for the 3/4" head bolts that secure an O-360 prop, but is .032" wire good for the 5/8" head bolts that secure an O-320 prop? Sheesh, that .040 is a bugger to work with when fishing up through a hole that faces the hub!!!

Yes ... 0.040
 

Randy.... Sensenich recommends 0.040 safety wire for all three bolt sizes they deal with - 3/8 - 7/16 - 1/2

http://www.sensenich.com/misc/mpinstal.htm

gil in Tucson

.040 for all props... sorry :(

For what's worth...
 

Safety wire is also used as an "indicator" so if you use .032 and check it each time you have the cowl off I don't really see the problem. Personally I've never heard of properly torqued prop bolts loosening up anyway! (this excludes wood props)
Walt
25yr A&P

wire tool
 

Go to the Yard (aircraft tools) and get the part number 13709. It is a screwdriver handle and shank with an end that looks like a radio antenna with two holes drilled in it.. you feed the safety wire through the holes and twist the wire with it... SO MUCH EASIER... www.yardstore.com

http://www.yardstore.com/index.cfm?A...ry&Category=12

You will be so happy....
Brian

Depends upon your prop manufacturer. If you read the WhirlWind
installation manual it will tell you to safety with .032. Initially I wired with
.040 but most recently I re-safetied with .032 and it's much easier, much
easier. These are captive nut/bolts. They may get loose but they are not
going to come off by themselves.