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01-17-2007, 05:47 PM
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Join Date: Dec 2004
Location: Mill Creek, WA
Posts: 617
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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!!!
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Randy Lervold
RV-12iS, empennage/tailcone complete, wings currently, fuse in box
RV-3B, first flight 2007 - sold
RV-8, first flight 2001 - sold
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01-17-2007, 10:24 PM
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Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
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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
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Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
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01-17-2007, 10:41 PM
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Join Date: Aug 2005
Location: Pasadena CA
Posts: 2,484
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.040 for all props... sorry 
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Stephen Samuelian, CFII, A&P IA, CTO
RV4 wing in Jig @ KPOC
RV7 emp built
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01-18-2007, 07:31 AM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,667
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For what's worth...
Quote:
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Originally Posted by randylervold
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!!!
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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
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Walt Aronow, DFW, TX (52F)
EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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02-08-2007, 08:21 PM
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VAF moderator
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Join Date: Dec 2005
Location: In Walter Mitty's dreams
Posts: 947
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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
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Brian Wallis
(Exempt AND VAF dues paid 02 FEB 16)
Callsign: VOODOO sold RV3 to pay for ratings !!!
AP/IA COM/Multi/IFR/350 type
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02-08-2007, 09:15 PM
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Join Date: Mar 2005
Location: Mansfield TX
Posts: 339
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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.
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